ESA

What’s it worth?

Time and again astronomers, space scientists and even people like me, who write about astronomy & space, get asked the perennial questions of “why go into space?” and “what benefit does it have?”. You can be almost guaranteed to get a question like this in an interview about anything which a) costs a lot and b) goes into space.

I can understand where these questions are coming from. However, I always try to come back and point out the many (and there are many) examples of how space exploration and astronomy has benefited humanity, both technologically and culturally; Stuart over on the Astronomy Blog has written extensively about this before in his excellent ‘What is the point of astronomy?’ posts here, here and here. At the end of the day though, what people are concerned about is the money that is invested in space, especially if it’s their own taxes.

On the one hand the UK is a member state of the European Space Agency and as such it’s involved in ESA’s operations. To be able to do this the UK has to subscribe to certain mandatory programmes; essentially it has to give ESA a certain amount of money which then gets put in to a collective ESA money pot (from all the member states) to do research with and generally keep the agency ticking over.

This subscription therefore enables UK scientists to participate in important ESA science programmes and exciting missions like Cassini-Huygens. The UK also gives extra money towards the optional ESA programmes and for that it can get involved in the things that it is especially good at. Things like satellite navigation, remote satellite observations of the Earth and more.

This page on the British National Space Centre (BNSC) website summarises the missions UK scientists are involved in. Most of them are through the UK’s involvement in ESA but there are others that UK researchers are also working on via other routes – like the brilliant Stardust mission. With the ESA involvement, UK scientists work at the forefront of research; literally exploring other worlds, working out new ways to make life safer, easier and better on Earth and studying our origins and those of the Solar System and Universe we live in. Scientists, technicians, engineers and many other people are employed in the process and the UK benefits greatly as a result.

On the flipside of the involvement and subscription to ESA (and therefore missions like Cassini-Huygens, Venus and Mars Express and many more) the UK is also home to a lot of private companies, who are also involved in space activities, and who bring money into the economy. And this is the reason why I’m posting this now. On Monday the BNSC published a report on the “size and health of the UK’s space industry” – and it seems pretty good. In 2006/07 the UK’s space industry turned over ₤5.8 billion and today employs around 19,000 people, up 1600 people on the previous year.

What’s great is the industry appears to be growing too, with a growth of about 8%, according to the link above. These figures look like a really positive sign for the growing UK space industry and will no doubt be mused over during the International Astronautical Congress 2008, being held in Glasgow this week. I’m off there tomorrow, so I’ll try and report back on what I see when I return, over the weekend. Meanwhile let me sign off this post by saying happy 50th anniversary NASA! Here’s to 50 more amazing years.

New Mars image and an update

I’m always impressed by the images that come back from Mars Express’ High Resolution Stereo Camera (HRSC). This new one released a few days ago (below) is no exception. It shows a region called Hebes Chasma, a vast gauge into the martian surface around 8 kilometres deep! The incredible feature is located just above the main canyon on Mars, the impressive and truly staggering in size (3000km long!), Valles Marineris. Each pixel in the image corresponds to 15 metres on the martian surface.

Scientists studying the image believe it shows evidence of landslides, depositions and other hints of a terrain shaped by erosion, large-scale geological activity and water. In fact recently the spectrometer on-board Mars Express detected signs of water-bearing minerals around Hebes Chasma showing that there have clearly been, according to ESA, “significant quantities of water” there in the past. To see more images as well as the high-res versions visit the ESA page here. If you have got some 3D specs then have a look at the anaglyph below to see Hebes Chasma in perspective.

Also a quick mention to thank all the people who came to my Hubble talk in Torquay on the 20th. It was good to visit Torbay again and to see many faces from the Torbay Astronomical Society which I haven’t seen for a while. I’m going to be heading over to Belfast on Tuesday for a few days for the Royal Astronomical Society’s National Astronomy Meeting 2008. When I get a moment I will post about some of the fascinating discoveries and announcements that always come up at NAM. It seems I will be in good company!

Top image: Hebes Chasma from the HRSC on Mars Express
Bottom image: A 3D anaglyph of the Hebes Chasma region
Image credits: ESA/ DLR/ FU Berlin (G. Neukum)

It’s all happening in the next few days…

There are a handful of very cool things going on in space over the next few days. Here’s my very quick run down of what not to miss.

The first event is happening in the wee small hours of tomorrow morning. The European Space Agency is launching the ATV, the Automated Transfer Vehicle, atop its Ariane 5 launcher. This is essentially a very large unmanned supply ship that is capable of flying to the International Space Station under its own power. It is going to be launched from the ESA launch site at Europe’s Spaceport in Kourou, French Guiana on Sunday morning at 04:03 GMT.

Once the ATV is at the station it will supply the ISS with drinking water, fuel for the station’s propulsion, food for the astronauts, clothing and spare parts for the new Columbus lab. It will also use its engine to boost the ISS into a higher orbit. Something that is very important to do as the ISS continually encounters the drag from the Earth’s atmosphere, causing it to slow and fall closer to Earth. You can read more about the ATV here and also watch the launch live here.

EDIT: The ATV has now successfully launched! You can try and see it too, albeit briefly, in the night sky (before it docks presumably) – more details at Heavens-Above.com

Above: An ESA Ariane 5 with the ATV inside, poised on the launchpad.
Credits: ESA – S. Corvaja 2008

The next Space Shuttle mission, STS-123, is set to lift-off from Cape Canaveral as well at 21:28 GMT on Tuesday 11th March. This is a night-time launch (by my recollection that hasn’t happened for a while) so should look very cool as the shuttle, Endeavour, rises into the inky black darkness. This will be the 25th flight to the ISS and Endeavour will be carrying a robotic system and the Japanese Kibo Logistics Module. You can watch the launch live on NASA TV and find out more about the Space Shuttle at the NASA page.

Above: The shuttle Endeavour lifting off on a previous 2007 mission.
Credit: NASA/John Kechele, Scott Haun, Tom Farrar.

The Cassini orbiter is going to be flying right over Enceladus’ surface on March 12th. Passing by only 50km above the icy moon’s surface we should see some truly incredible science come out of this flyby. Hopefully we will find out more about those jets! Cassini won’t be imaging though, at its closest appraoch, as it will be travelling far too fast not to take blurry pictures. But the pictures from before and after the approach should be amazing. You can get all the updates from the Cassini-Huygens website over at JPL when they are released.

Lastly then the Moon passes very close to the Pleiades cluster of stars on Wednesday (12th March); making for a nice early evening view through some bins or a small telescope. Visit the night sky page for more info.

Odyssey’s end in sight for Ulysses

After just over seventeen years in space the Ulysses space probe looks as if its mission is drawing to a close. According to the European Space Agency Ulysses is beginning to show the signs of age, after nearly two decades touring the Solar System in orbit around its main interest – the Sun. The spacecraft is in a somewhat peculiar six year orbit around the Sun which takes it at one extreme flying right out to Jupiter and at the other extreme whirling over the Sun’s polar regions.

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Ulysses has scrutinized the Sun in great detail over its seventeen or so years, telling us about the solar wind (the stream of charged particles emanating from the Sun), the Sun’s powerful magnetic field as well as how the Sun’s chromosphere and corona interact. One of Ulysses’ most interesting finds was that the solar wind at the poles of the Sun is emerging much faster than at the equator (with speeds of 750km/s and 350km/s respectively); and that the polar winds dominate about 2/3 of the heliosphere (the vast ‘shield’ around the Sun created by the solar wind). The probe, which was launched from the Space Shuttle’s cargo bay in 1990 has also studied Jupiter’s magnetic fields and the plasma environment around the giant planet.

So why is Ulysses dying after all these years? Well the probe itself is powered by the radioactive decay of a special isotope of plutonium. This decay slowly releases heat which the probe’s on-board technology converts into electricity. This in turn powers heaters, the science instruments and the communication antennae that are needed to send data back to Earth. However over time the radioactive isotope decay levels drop meaning that so to do the amounts of electricity produced.

This poses a problem for the craft because as it ventures out into space it needs its on-board heaters to keep the spacecraft at the right temperature. If they don’t and the craft’s temperature drops below 2°C then the probe’s fuel hydrazine (where have you heard that before) will freeze solid. It reminds me a bit of the lizards on David Attenborough’s incredible new BBC series ‘Life in Cold Blood’. They either need the Sun to warm them or find some heat of their own, otherwise they will freeze and die.

The scientists working with the Ulysses probe realised that if they didn’t do something the power levels would drop so much that the heaters and the science instruments would stop working – freezing the all important fuel. So in January they turned off the main transmitter that was sending data back to Earth in the hope that the re-routed power would go to the heaters and the science packages; keeping the hydrazine liquid. Unfortunately when they wanted to turn the transmitter back on to see if it had worked nothing happened. Now it seems Ulysses’ fuel will freeze as the probe cools in the vacuum of space to that crucial 2°C, bringing with it the end of an illustrious mission. Thankfully though there are many missions which are taking up Ulysses’ baton like SOHO, Stereo, Trace and Hinode. So solar science will be continuing into solar cycle 24, long after little Ulysses ends.

Above: An artist’s impression of the Ulysses probe
Credit: ESA

Behind the scenes at Hubble

The latest Hubblecast is out! Episode number 10 explores behind the scenes of the NASA/ESA Hubble Space Telescope.

“We live in a Universe of unimaginable scale and almost incomprehensible beauty. How is the light from the Universe transformed into the images that have inspired generations by making the Universe come to life?”

If you have ever wondered how the incredible images from Hubble are made then this Hubblecast is for you!

Image credit: NASA, ESA, and the Hubble Heritage Team STScI/AURA)-ESA/Hubble Collaboration. Acknowledgement: B. Whitmore ( Space Telescope Science Institute) and James Long (ESA/Hubble).

“Hubble shows ‘baby’ galaxy is not so young after all”


The latest news release from the NASA/ESA Hubble Space Telescope is out now on the ESA Hubble website – http://www.spacetelescope.org. It’s the story of how a galaxy we thought (for quite a long time as it happens) was really young is in fact very old.

“The NASA/ESA Hubble Space Telescope has found out the true nature of a dwarf galaxy that astronomers had for a long time identified as one of the youngest galaxies in the Universe. Astronomers using the NASA/ESA Hubble Space Telescope have made observations of the galaxy I Zwicky 18 which seem to indicate that it is in fact much older and much farther away than previously thought.”

Image credit: NASA, ESA and A. Aloisi (ESA/STScI)

Hubblecast filming

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On Tuesday morning a small team from the ESA/Hubble office here traveled to a studio to film the next episode of the Hubblecast (no.9). The studio is located about 70km south of ESO headquarters, in the foothills of the Alps on the shore of Tegernsee a perfect place for the creative juices to flow!

We began work at about 9am with the shooting of Dr J’s introduction scenes as well as some more regular pieces to camera. In this episode we have pushed the boat out with some of the graphic effects too, the results of which you will see soon! After a couple of hours work the filming was complete and it was back to the office where the video could be added to the images and animations made by the graphic designer.

Image credit: Will Gater

I’ve just watched a preliminary cut of one scene and it is looking really very cool! Hopefully this will be one of the best Hubblecasts yet!

Touchdown in Germany

A few days ago I arrived in Germany to begin three months working on a science communication internship for the ESO/ESA/ST-ECF Hubble Europe Information Centre (HEIC) in Garching near Munich. The centre is located about 2km from Garching and is about an hour and a half from the Bavarian Alps. HEIC is part of the ESO headquarters here (alongside the Max-Planck Institute for Astrophysics) and is the central production hub for all media/press information and science communication literature and media, from Europe, about Hubble.

Each month our group sends out news and photo releases, vodcasts and much more about Hubble’s latest discoveries. They also manage outreach and public affairs for a number of other astronomical organizations and projects such as the IYA 2009.

Yesterday was my first day working in the offices here and I enjoyed it hugely! My job here is as a science writer so my main responsibilities lie in writing news and photo releases for the press, editing other releases and scripting the Hubblecast, ESA’s vodcast about recent Hubble results. I am also editing part of the Hubble website www.spacetelescope.org, helping to update sections with the latest science results. The pace of the work makes for a really exciting day. I started work at 9am and by 10am was doing my first teleconference with a scientist in Spain whose research I was writing a photo release on. The image we are working on is incredible and I will show everyone on this site once it is released (and the embargo is lifted) sometime in the coming weeks.

Within our offices there are graphic designers, science writers, web developers and others working on cool projects that the HEIC teams are related to. The team also consists of many other people who work on Hubble outreach and science communication projects, these include the people who turn data into amazing images. One of the coolest things to see is how the image you see on the news or in astronomy magazines goes from the raw Hubble data to these stunning pictures we’ve come to know and love. I think I’ll devote another whole post to that process later. It is quite something to see a fresh image which only the scientists working on and the people in the HEIC office have seen!

For now though why not go and watch the latest version of the Hubblecast here?