Showing posts with label Andre Kuipers. Show all posts
Showing posts with label Andre Kuipers. Show all posts

Saturday, 28 September 2013

Hanging out with Astronauts: ESA/DLR's SocialSpace Cologne, 22 September 2013

(note: click the images with this post to get larger versions)

It can be safely said that unless you work in the space industry, you won't meet an astronaut very often. So you can perhaps imagine how exciting it is to the average space buff like me, to meet seven of them in one day!

Now hold that thought, and imagine how surreal the moment becomes when an astronaut (Léopold Eyharts, pictured below) is sitting at your table, in the chair right next to you, casually discussing the merits of the Soyuz versus the Space Shuttle in the same way that others compare a Volkswagen to a Prius...


Astronaut Léopold Eyharts sitting next to me at SocialSpace Cologne, discussing the merits of Soyuz versus Shuttle

That certainly is not your average Sunday afternoon....

The scene I describe happened in the afternoon of  Sunday 22 September at the SocialSpace Cologne meeting organized by the European Space Agency ESA and the German Aerospace organisation DLR.  The meeting took place at the DLR complex near Cologne, Germany.

SocialSpace is ESA's new name for a Space Tweetup, the new name reflecting that they seek an audience from a wider scope of their social media followers than just Twitter.

Until a year ago, when I attended my first, the 'tweetup' phenomena was completely unknown to me. Readers of my report on the May 2012 AndréTweetup at ESTEC will remember how I was unsure what to expect, half of me fearing that I would be confronted with 70 Sheldon Coopers plus a handful of Wolowitzes, dressed up in trekkie costumes...

(incidentally, there was a trekkie among the SocialSpace attendants this time, dressed up as Mrs Spock. Yes, Mrs Spock...: in stockings, and complete with pointy ears).

In reality, these tweetups turn out to be interesting and fun, the people involved generally quite sane and very nice, and an occasion where you make new friends. Some of these I now met again, in the context of this SocialSpace Cologne event, and I discovered that this proces of meeting attendants you know from a previous tweetup, together with the fact that you make a bunch of new like-minded acquaintances, is an important part of the social process of this kind of meetings. For example, I met Eico and Alex Neumann again (@Travelholic and @4tuneQkie on Twitter), even though they did not participate in the actual tweetup SocialSpace this time. They were however present at the informal social gathering at Brauhaus Sion the evening before the event.

SpaceKoelschX the evening before SocialSpace: 40 Space tweeps, beer and schnitzels

This unofficial pre-gathering called SpaceKoelschX consisted of some 40 people gathering for Kölsch (local beer), schnitzel, bratwurst, bratkartoffeln and a general swell time on the evening before the SocialSpace event. Most of them were SocialSpace attendants, and some of the ESA social media people were there as well. But the group also included people from previous tweetups that were not selected to attend this time, but came to Cologne on their own volition to visit the German Aerospace Day, a huge event which attracts about 100 000 visitors.

The ESA/DLR SocialSpace event itself took place the next day in a large tent on the vast DLR grounds bordering the airfield near Cologne, in the context of the already mentioned bi-annual German Aerospace Day.



two fish-eye views into the SocialSpace tent

The 60 attendants were selected from a large group of active social media followers who applied to a call spread through the ESA/DLR social media accounts (i.e., Twitter and Facebook). These lucky ones selected, including yours truely, got treated to a special program of lectures, a VIP tour through the DLR and ESA facilities, as well as a meet-and-greet with a whole bunch of astronauts.

And when I say "a whole bunch", I truely mean: a whole bunch. At a certain moment our SocialSpace tent on the DLR grounds started to teem with blue flight suits, to the point where I started to mutter: "we must find the nest and destroy the eggs!".

The image below shows you, from left to right: Reinhold Ewald, Thomas Pesquet, André Kuipers, Alexander Gerst, Frank de Winne, Léopold Eyharts and Andreas Mogensen:


Part of the tweetup SocialSpace tradition seems to be the presence of a number of mascots. I have covered Hugh the bear before in my report on a previous tweetup: present this time were a host of other mascottes, ranging from a Space Barbie to a Pink Little Dragon to Camilla the Space chicken. I must admit, this is a part of the Space tweetup SocialSpace folklore that I still have to get used to...

Me posing with Pink Little Dragon and Camilla the Space chicken

@projmgr and Space Barbie

@4tuneQkie with Camilla the Space Chicken and Pink Little Dragon during the SpaceKoelschX
ESA's Daniel Scuka (right) and another ESA employee who's name I do not know DLR's Elke Heinemann with Paxi, ESA's kids mascott. A life-sized version of Paxi visited us later.

While this all might make an impression of Space oddities, there was serious business as well. We got treated to a fine series of lectures that day by several ESA and DLR scientists, astronauts and a test pilot.

After we were picked up at Porz-Wahn station and brought to the venue by bus, the traditional handing out of badges, T-shirts and goody bags took place. After brief general introductions by the organizing team of ESA and DLR, we all shortly introduced ourselves. One of the nice things of large ESA tweetups like this is the very international vibe. The attendants to this SocialSpace came from all over Europe and even beyond, including the US and Canada.

Next we all set up shop with our laptops and other devices, from which we started to Live tweet the event. After all, it is a tweetup, n'est ce pas? We did it so well that #SocialSpace became a trending topic for a while. Two of the attendants even established a live webcast of the event.



The series of lectures started with ESA's Robert Meissner lecturing about the use of satellites for remote sensing. Apart from breathtaking satellite imagery, his lecture provided a good overview of the kind of remote sensing observations satellites can perform, and their practical application. Keeping an eye on crop production and soil and biomass degradation are important applications, for example.

Apart from modern imagery and their application, Meissner also showed us the very grainy first image of earth ever taken by a satellite, over 50 years ago. With a jump to the future, he announced that the GMES/Copernicus data, an ambitious Remote Sensing program by ESA, will be Open Access.


Sometimes satellite images contain baffling things. In the image above, Meissner shows us a giant geoglyph of the Egyptian god Horus that is visible on satellite images of an area in the interior of Australia. It was probably created as a joke by the Oz Army Corps.

The next lecture by Jens Danzeglocke connected to the previous lecture by taking a detailed look at the role European spacecraft (amongst others) play in disaster crisis management. The information exchange network the spacecraft play a role in, helps local authorities to quickly assess damage from natural disasters and coordinate disaster relief efforts based on these results. Most of these activities (about half of them) concern flood disasters, and Danzeglocke told us that radar satellites play an important role in these, as flooding disasters tend to be accompanied by cloud cover. The international Space charter the European space agencies take part in covered over 400 disasters in 110 countries since  2000.

Next another Jens, biologist Jens Hauslagen, lectured about "food in space". This was an interesting lecture about research into the useful application of waste recycling for crop growing in a closed system (e.g. a Space Station). Did you know that one human produces 10 kg of urea, 110 kg of 'organic waste' (that is: poo) and 100 kg of left-over food each year? In a closed system, these have to be recycled, and Hauslagen works on a series of very intricate ways to do this, including all kinds of filters but also small bio-organisms and even fish. Not only does this reduce waste: by recycling it enables the growth of food in long duration missions. His work has a down-to-earth application too: for example, there is a Maroccan town that recycles leftover waste from its fruit- and vegetable markets with techniques developed by Hauslagen and his team.

DLR test pilot Steffen Gemsa

The next speaker was DLR test pilot Steffen Gemsa. This is one of the pilots who took off in a research aircraft to fly into the volcanic ash cloud during the April 2010 Icelandic volcano crisis. Yes, you read that right: all over Europe aircraft were grounded, and this guy deliberately flew into the ash cloud. It's part of his job, that also includes testing aircraft under specific conditions, and conducting research flights with scientific equipment. It was an interesting lecture, as a result of which I learned the interesting bit of trivia that there are only five (5) test pilot schools worldwide.

Following Gemsa, Manuel Mezt and Holger Krag of ESA and DLR talked us up to date on all matters concerning Space Debris, ways to detect them and ways to mitigate the dangers of them. This included some results of simulations, and visualizations of all space debris in orbit around the Earth. Which is 93% of all objects currently in orbit.

Manuel Metz visualizing all object in orbit

Krag told us that every day some satellites are hit by (very) small particles of space debris smaller than 0.1 mm. The number of particles has dramatically grown over the past years due to a Chinese ASAT test in 2007 and a collision between an old Russian rocket booster and the Iridium 33 satellite in 2010. Krag made clear that if we continue this way, spaceflight will soon become impossible. Hence, measures are necessary to reduce the amount of space debris.

One way to reduce space debris is by making objects decay faster. This can be done for example by fitting spent rocket boosters and decommissioned satellites with solar sails. These sails increase drag, reducing on-orbit lifetimes.


 Krag: fitting satellites with solar sails after decommision will speed up their decay

Incidentally, Dutch astronaut (ehrm, pardon: European astronaut of Dutch origin) André Kuipers would later tell us about his experience with space debris too: during his stay on the ISS in 2012, they had to do two diversion manoeuvres plus a retreat into the Soyuz capsule because of close encounters with larger space debris.

After I asked a question in the discussion, Manuel Metz came over to me at the start of lunch, and told me he actually reads my blog. Wow!

Lunchtime also served as an hour off to freely roam the DLR grounds. Together with @Susivic I made a short visit to the airfield to see some of the aircraft there, including a Eurofighter:


Eurofighter, the jet our government did not buy

Incidentally, this was also the moment we first glimpsed André Kuipers, whom would later visit us in the tent.

When we came back from our short stroll over the DLR Open Day, DLR chairman and ESA director Jan Wörner and Thomas Reiter briefly took the stage.Whenever you see suits on stage, you know they will talk politics. Space politics in this case, with a brief discussion of future plans and goals. Reiter made the interesting statement that "I can believe we will perhaps see humans return to the surface of the moon in the next decade".

Next came a series of lectures all connected to ESA's Rosetta sampling mission to comet Churyumov-Gerasimenko. The first lecture, a grand overview of this exciting mission to land on a comet (!), was by project PI Gerhard Schwehm, who was involved when the mission was conceived in 1985 (!) and now will see it completed just before his retirement. In the original plans comet Wirtanen was the target, but when the launch suffered a  delay, comet Churyumov-Gerasimenko was selected.


 Schwehm

After Schwehm, and as an intermezzo, the astronaut and my fellow countryman André Kuipers took the stage, as a replacement for Samantha Cristoforetti who at the last minute could not make it.

I decided that the Geek code in this case as a rare exception does allow for a selfie:

Selfie with astronaut in the background

André told various anecdotes from his PromISSe mission in 2012 (the longest ESA mission onboard the ISS), including the short-circuit in the solar panels, the temporary retreat into the Soyuz because of a dangerously close encounter with a large piece of space debris, and the fact that all three of them threw up after their Soyuz capsule landed in the Kazachstan steppe. He told us astronauts need half a year to recover from a spaceflight and that the bone loss suffered during a long ISS stay might actually never fully recover. The unknown long-term effects of cosmic radiation are also a concern.

Kuipers stated he welcomes commercial spaceflight as long as it is done safely, and he said he believes the SpaceX Dragon will one day fly astronauts.

Kuipers was one of the two astronauts grappling and hooking up the first DragonX capsule to the ISS. Later that day, when the astronauts present intermingled with the SocialSpace attendants, he would tell the story of docking the Dragon in more detail:

St Kuipers, retelling how he slew the SpaceX Dragon in an epic heavenly battle

Stephan Ulamec and Koen Geurts next lectured on details of the Philae lander that is part of the Rosetta mission effort. Ulamec told us that since no-one has ever landed on a comet before and we actually know very little of the make-up of the nucleus of the comet in terms of surface condition and density, it is a very tricky thing to do. Another challenge is the long-term operation of the spacecraft without RTG's to provide energy (Rosetta/Philae has solar panels only).

The lander is actually washmachine sized and the landing will involve a bit of Space Whaling: the probe will fire two harpoons into the cometary nucleaus and rope itself in. Its first act will then be to take a 360 degree panorama to see in what position it landed. Ulamec succinctly summed up the scientific importance of the project by stating: "If you want to get to the pristine material, you will have to land there" (with "there" being the comet, which is made up of pristine materials from the formation of our solar system).

After these highly interesting lectures, it was time for our VIP tour through the EAC facilities. We were divided up in two groups, each of which  was met by an astronaut (in my group's case, Thomas Pesquet) who would act as our guide. Pesquet did not spare us the gory details: at the Neutral Buoyancy Facility, he told us astronauts frequently lose a fingernail while practising in the suit in what I am apparently not allowed to characterize as a giant swimming pool.

Columbus module mock-up in the EAC Neutral Buoyancy Facility
Apart from the Neutral Buoyancy Facility, we also got a quick glance at the only existing life-size mock-up of the ATV, which made me realize how big the ATV's actually are. Next, Pesquet took us to a place rarely visited by outsiders: ESA's  Eurocom control room, where they monitor and control all kinds of European things going on in the International Space Station:

Eurocom

 Thomas Pesquet explaining things in the Eurocom control room to us

Geek humor in Eurocom

After this first truely Close Encounter with an alien astronaut, we went back to the SocialSpace tent where we got a very cool demonstration by ESA's  Advanced Concepts Team, who work on some very geeky stuff. They demonstrated a quadcopter drone controlled by an iPad app, simulating the ISS in a game environment. The app might one day actually help finetuning techniques so drones (or spacecraft) can automatically assess distance.

the drone


Then it was time for more astronauts again. Alexander Gerst who had elsewhere just completed a press conference where he revealed the name of his upcoming ISS mission, Blue Dot, and Thomas Pesquet who earlier was our guide at  the EAC tour, took the stage.

 Thomas Pesquet (left) and Alexander Gerst (right)

They turned out to be a golden comedy duo, with very witty retorts between the two. Thomas Pesquet next asked the audience for suggestions what to do in terms of social media activities when he is in the ISS, "since about everything already has been done by now...". May I suggest a weekly comedy show from space perhaps?

Then the moment came where the tent suddenly started to teem with an overload of astronauts. Seven of them took the stage, and next intermingled with us by sitting down among us at the tables, answering questions and relating experiences. At this point, we had a significant part of the European astronaut corps hanging out with us!


 Léopold Eyharts, who went to MIR in a Soyuz in1998 and to the ISS in a Space Shuttle in 2008, sat down next to me and told us the ride up is better on the Soyuz, but the journey down is much more comfortable on a Shuttle. One of the reasons which he mentioned for that verdict was the constant swinging of the Soyuz capsule under the parachute.

Apart from listening to Léopold Eyharts, I listened to André Kuipers and later had the opportunity (thanks to Suzanne Pieterse (@Susivic), who handled the camera) to have my picture taken with him. He also signed a folder of postcards for me and my SocialSpace badge. Which made me tweet, in a Sheldon Cooper moment: "Now I have his DNA!"



André Kuipers kindly posing with me

signed badge and postcard folder


With this, the day finally ended. Or more or less: there was an informal drink afterwards, which saw more opportunity to talk to astronauts, various ESA people and other attendants.

ESA's Social Media guy, Daniel Scuka, talking to two attendants


Around 18:45 I left for the station for the ICE journey back, but not after grabbing a quick bite with Lynn van Rooijen (@lynnvr) at the trainstation. I was knackered when I arrived home, well after midnight: but it had been worth it. This was a cool day with an overload of astronauts, a highly interesting lecture program, and lots of very nice people. I would not have wanted to miss it!

I warmly want to thank the ESA/DLR organizers, and specifically Daniel Scuka, for inviting me to this wonderful day and all the good care they took of us.


(Note: photographs with this report were taken with two cameras: my Canon, and a rather old and decidedly less quality iPhone. So apologies for the bad quality of some of them)

Monday, 23 September 2013

You don't get to meet an astronaut every day

This weekend I was invited to attend ESA's and DLR's #SocialSpace tweetup in Cologne, Germany, organised in the context of the German Aerospace Day.

I will post a more elaborate photo report of this very fine and interesting meeting later this week, but for the moment I want to show you the picture below: Dutch ESA astronaut André Kuipers, who went to space in 2004 and 2012, was so kind to pose with me for a picture.

click image to enlarge

Tuesday, 12 June 2012

Visiting ESTEC for the #AndreTweetUp, an in-flight call with astronaut André Kuipers

On 29 May 2012, some 80 space and twitter enthusiasts gathered at the European Space Agency's (ESA) ESTEC center in Noordwijk, the Netherlands, for a "tweetup" called the #AndreTweetUp. This author was among them.

 AndreTweetUp attendants (photo: ESA)
click image to enlarge

A "tweetup" is a gathering of twitter users. ESA organised the event around a live in-flight call with Dutch astronaut André Kuipers who is onboard the ISS. Eighty followers of the twitter acount of  André Kuipers were invited to attend, after a selection procedure that included the formulation of a question to Kuipers.

Ten of the 80 people present, actually got to ask that question during the live in-flight call . The event  included two lectures, a guided tour through the ESTEC facilities, and ended with the live video in-flight contact.

Dutch astronaut André Kuipers onboard the ISS live from space on the screen, and Swedish astronaut Christer Fuglesang in front of the screen moderating the live in-flight call (click image to enlarge)

For this author, who was among the lucky 80 to be invited (but alas not among the even more lucky 10 who got to ask their question to Kuipers), this kind of event was new. I jumped the twitter bandwagon late, a few months ago, and untill this #AndreTweetUp occasion, I had never heard of "tweetups".

So I had no idea what to expect. I half expected a hall full of Sheldon Coopers, dressed in Star-Trek costume, mumbling "fascinating!". Or 80 Wolowitzes, trying to hit on the ESA hostesses and talking about the space toilet they designed.

The reality was more benign. Indeed, there were a few people walking around wearing an astronaut's flight jacket covered in space-related patches (mind you: one of those actually was a genuine astronaut: ESA's Christer Fuglesang). And there were a couple of tweeps that seemed to build a life around this kind of events, recognizable by their paraphernalia that included custom t-shirts  and keychains with the words "tweetup" and "space" prominent and a mascotte in the form of a space-suit clad bear called Hughie:

Hughie

But all of these people turned out to be quite nice and normal! The evening before the event, I had a great time as part of an informal evening drink with a few of them (including but not limited to  @travelholic, @4tuneQkie, @DanielScuka and @rtimmermans) in "Einstein" in Leiden:

 Me (right) talking with ESA's Daniel Scuka (@danielscuka, left) about Space and Neandertals with Alex Neumann (@4tuneQkie, seen on back) listening, at the #spaceborrel in Einstein (Leiden) the evening before the tweetup (photo by Eico Neumann/@Travelholic)

You see: this almost looks like normal people! ;-)

Of course, this wouldn't do, so during the tweetup ESA had us all dressed in nerdy t-shirts with the ESA logo and "#AndreTweetUp" on it  ;-)


To bring in the Wolowitz factor, one of the things they let some of us do, was remotely move a robot arm on a future moon-rover located in a lab in Italy. Below is me, giving the command "move arm to left" (no word yet whether they got the rover out of the ditch again).

My Wolowitz moment: remotely moving a robot-arm on an ESA moonrover in a lab in Italy

The program was varied and started with a presentation by ESA's Walker including music videos that amongst others Elton John had made especially for this ISS mission. Walker told that by teaming up with Elton John, the amount of website hits on the ESA mission page increased a factor 2000!

  Tweeps and their laptops (for twittering) in the Erasmus hall

Next we had a very fine video presentation by one of the attendants, Remco Timmermans (@rtimmermans on Twitter), who had travelled to Baikonur to see the launch Soyuz TMA-03M blasting off Kuipers to the ISS.

We were then split-up for a guided tour through the ESTEC facilities, including a peek in the clean-labs (where alas photography was not allowed) and a 3D presentation where we got a virtual tour "trough" the ISS.

And of course, a notable number of the attendants duly tweeted all their experiences as the day progressed (photo shows a few of them listening to an explanation at the Russian Foton capsule, and tweeting about it):



The hall where we tweeps were settled, had enough to see too, as it included amongst others a life-size mockup of the European ISS module Columbus, a genuine Foton capsule and  the genuine Atmospheric Reentry Demonstrator (ARD) capsule, the only European capsule having been to space and then re-enter and land safely:


 Atmospheric Reentry Demonstrator (ARD). This capsule (it is the original) went to space and came back

Life-size Columbus module mock-up (multiple image stitch)

Russian Foton capsule (original)

Overview of the Erasmus hall, with mock-up Columbus module


Next Swedish astronaut Christer Fuglesang lectured us on his experiences with travelling to the ISS onboard a Space Shuttle, and introduced the very varied research done onboard the ISS:

ESA astronaut Christer Fuglesang, went to space twice

And then it was time for the big moment: the live in-flight video call with Dutch astronaut André Kuipers who is flying onboard the ISS as part of the PromISSe mission. The contact happened at 15:55 UTC (17:55 CEST) while the ISS was over the Galapagos and S-America, by means of a TDRS relay.



Here are some of the lucky 10 that got to ask their question lining up:


Even a "celebrity", soap-actress Babette van Veen (worldfamous in the whole of the Netherlands), got to ask a question (at ~6:15 in the video at the bottom of this post):



Below is a video showing parts of the in-flight call (as the memory card in my camera had filled up, I had no space left to film the complete in-flight call. I thought 8 Gb was enough, but no...).


It was fun and interesting to be present at this happening, and I wish to express a sincere "Thank you!" to the people of ESA and ESTEC for organizing this day!

Friday, 16 March 2012

André Kuipers talking from Space

This morning near 11:14 local time (10:14 UTC), Dutch astronaut André Kuipers onboard the ISS had a radio talk with a school class in Belgium on 145.800 MHz. From Leiden, I listened in using my old scanner radio and a homebrew dipole antenna (two hardware store 50 cm metal rods connected to a coax cable). Below is a recording of part of the reception (voice is André Kuipers, in Dutch):


The school class in question was a class from primary school De Regenboog in Bree, Belgium.

It is always cool to directly hear astronauts from Space. I listened in on André Kuipers talking from space before during his 2004 mission and several times have picked up communications between ISS astronauts and Russian ground stations in the past. You don't need fancy equipment for that: a normal scanner-radio and the kind of simple homebrew antenna I use will do. I use an old second-hand Realistic Pro 2042 receiver and a dipole antenna made out of a 1 meter M5 rod from the hardware store that I sawed in to 50 cm halfs, which are connected to the coax cable. Very simple but it works! See below image (cat is vital for good reception ;-p  )





Wednesday, 4 January 2012

Cloud-hampered ISS pass of January 2nd, and deep twilight pass of January 3rd




The evening of January 2nd started clear, so I set up the video to film another pass (17:01 UTC) of the International Space Station (ISS) which currently has the Dutch astronaut André Kuipers on board.

Unfortunately, an episode with many clouds commenced just before the pass. I managed to film glimpses of the ISS through gaps in the cloud cover.

Very frustratingly, it was completely clear again 10 minutes after the pass.

On January 3rd, it was clear. ISS made a pass in very deep twilight (16:04 UTC), with the sun at an altitude of only -3.5 degrees! Nevertheless, the ISS was well visible by the naked eye, in a bright blue sky with no stars yet.

Friday, 30 December 2011

Footage of the ISS with Andre Kuipers on board passing over Leiden, 30 December



The footage above was shot by me this evening (30 December 2011, evening twilight, around 16:38 UTC = 17:38 local time). It shows the International Space Station (ISS) with Dutch astronaut Andre Kuipers on board, passing right over my observatory in Leiden, the Netherlands.

The movie was shot using a sensitive WATEC 902H camera and F1.4/12mm lens (this is not the best of lenses in terms of sharpness, but it has a relatively wide FOV of 30 degrees that suited this case. This lens provides a reasonably good approximation of the typical visual view as well in that the limiting magnitude of the movie is similar to that with the naked eye).

I had actually almost missed this pass, as I was busy with another task and lost track of time. So I had to set up my equipment rather in a hurry, with no time to start up and synchronize the GPS time inserter. As usual (and also because I do not yet ahve a "routine"with this new equipment) I initially had an "issue" in getting an image on the laptop monitor: when I finally had an image and could focus, the ISS was already in the sky, ascending at 45 degrees elevation in the west.The sky was still a bit bright from twilight, and some hazy clouds were in the sky.

The footage picks up the ISS in northern Cygnus, shows the ISS as it ascends and goes through the zenith, passing over Pegasus and into Andromeda and next descends through the triangle towards the east, disappearing behind the roof of the house.

I am happy to have this footage at all, as the weather is abominably bad this month.

Saturday, 24 December 2011

[Updated] Breaking News: Decay of Soyuz r/b stage from André Kuipers' launch to ISS observed from the Netherlands!


UPDATE - the final TIP for Soyuz r/b 38037 / 2011-078B has been released by USSTRATCOM near 18h GMT and it indeed shows that this was the Soyuz r/b: reentry time is quoted as 16:25 +/- 1 minute GMT at 49 deg N, 7 deg E. This fits the observations well.
In the Dutch press, there meanwhile appears to be a lot of confusion. The Dutch National Police claims that they talked to "NASA" who apparently said it was a "meteor" (or "comet"). So THAT is widely claimed in the press now, to the point of calling the identification with the Soyuz 3rd stage "speculation". Which it is not: it is based on factual data and now clearly confirmed by the USSTRATCOM JSpOC TIP message. What more do you want?!

I have no idea to whom (or even where: NASA is big...) the Police spoke, but for all things it could have been the JPL janitor....
At any rate: appart from my analysis below (which is already clear), the USSTRATCOM TIP message mentioned above makes unambiguously clear that this was the Soyuz 3rd stage.
Note that to access the USSTRATCOM TIP message via the link above you need an approved account. USSTRATCOM is the US military Command responsible for tracking manmade objects in space, and perhaps better known under their former name NORAD.
- end of update

Multiple reports are coming in, among others by experienced Dutch meteor observers Carl Johannink (Gronau) and Arnold Tukkers (Denekamp), of a bright and very slow fragmenting object seen low in the west-southwest near Venus at 16:26 UTC, 24 December.

From the descriptions it clearly was a reentry of an artificial object (space junk), as the event was too long in duration and too slow to be a meteoric fireball.

And it was not "just" a random bit of space debris, it turns out:

The observations fit with 2011-078B (#38037), the last stage of the Soyuz rocket that brought Dutch astronaut Andre Kuipers up to the ISS earlier this week. It was already predicted to decay near this moment by USSTRATCOM.

Below is the  predicted trajectory of the Soyuz  3rd stage for the Gronau/Enschede area (and below that, the ground trajectory). It is based on an orbit with an epoch near noon of 24 December (epoch 11358.49032868. Source: USSTRATCOM), so a few hours old, which will introduce some minor discrepancies (a few seconds in time). But it fits the descriptions very well in terms of time and trajectory in the sky.
click images to enlarge


[UPDATE 7 October 2017]:

I recently modelled the re-entry of 2011-078B in GMAT, using the MSISE90 model atmosphere with actual Spaceweather of that time. Drag surface was set at 60% of the maximum drag surface for a Soyuz upper stage: this yields a decay position and decay time well in agreement with the JSpOC TIP position and is close to what the drag value for a tumbling, fragmenting object would be.

As seen from Gronau in Germany, it yields the following sky trajectory. Compare with Carl Johannink's description below: it matches his description well.

click map to enlarge
- end of update

- continuing original post:

Some quickly translated descriptions by two experienced Dutch meteor observers (compare to the sky trajectory map above for their area):

Arnold Tukkers, Denekamp (Netherlands):

At 17:26 CET (=16:26 UTC) I looked out of the window and saw a strange phenomena just above the rooftops behind us. It looked like a very, very slow meteor fragmented in several pieces. Like Peekskill but less bright.
Multiple fragments. Because it was so low in the sky, I walked upstairs and could still see the last part from the bedroom window. So it at least took 20 seconds. [...]
What a sight! Trajectory for me (did not see initial part) southwest-southeast. Altitude maximum 20 degrees. Colour brown-red.


Carl Johannink, Gronau (Germany):

Just was looking at Venus in evening twilight.
Left of it an object appeared from behind a cloud that I first thought to be an aircraft, but next I found something was not right. The thing sometimes brightened and became fuzzy, trailing a circa 8 degree long tail. Maximum brightness about -4.
The object roughly moved from SSW to SE at an elevation of about 15 degrees. The whole phenomena took over half a minute.

To see the second part of the trajectory I had to walk to a different room. Called in Elisabeth, together we saw the object fragment into pieces (each individual piece about mag. 0 to +1) and then fade out.

The whole event looked much alike to the New Years Eve satellite decay of 1978, albeit being somewhat less bright.
Update:
A number of video's from Germany have surfaced which likely show the event. Here are a few:
video 1
video 2
Video 3 (on the Bad Astronomer's blog)
Video 4
Video 5

FAQ

Read the answers to Frequently Asked Questions for this reentry case I published later here.