Archive for the 'space missions' Category

Doug Ellison’s Open University Mars talk

I’ve just started ‘following’ unmanned spaceflight expert Doug Ellison on Twitter and, out of curiosity, I went back and had a look at a few of his most recent tweets. I’m glad I did, because I spotted a mention from him about a talk he recently gave to the Open University about Mars. Entitled “Exploring Mars – A crash course on the Red Planet”, the talk is a comprehensive run down on the exploration of Mars from Schiaparelli’s ‘canali’ and ground based images of Mars to the up close exploration of the MERs.

Doug is the founder of the Unmanned Spaceflight forum and his expertise and enthusiasm really comes through in this talk. He uses images and animations from the recent Mars missions, to illustrate the talk, which he sews together with his commentary. If you want a summary of humankind’s recent robotic exploration of Mars, this video is a great way to spend an hour on a wintry Saturday afternoon. The video is available in an high quality version as well, so you can read the notes that Doug occasionally puts up on the screen. The video is below (wide-screen & high quality version on the YouTube site) and a link to Doug’s Twitter feed is here.


“Exploring Mars”. Credit: Doug Ellison/The Open University

Tool infinity and beyond

I’m getting a few emails asking about the toolkit that an astronaut dropped from the International Space Station last week, and whether it is visible from the Earth. Well the answer, apparently, is yes it is. According to the Spaceweather.com website the bag has been spotted by amateur astronomers and should be visible from the UK this week through a good pair of binoculars, if you know where to look.

shuttlests-126A stunning view from the Space Shuttle Endeavour (STS-126). Credit: NASA

If you haven’t been following the story then here’s a quick refresher: last week whilst on a spacewalk to repair part of the, now 10 year old, space station an astronaut let go one of the station’s toolbags and it gently floated away and out of reach. It’s now moving away from the space station all on its own, appearing around five minutes before the ISS as it crosses the sky. You can watch a video of the errant toolbag here on the Daily Telegraph website.

If you want to find out when the ISS (and the toolbag) will be flying over your site then have a look at the Spaceweather alerts page here. This story has been getting a lot of attention in the national media and press; but let’s not lose sight of the fact that the ISS has just passed an important milestone this month (10 years in space) and that this extended shuttle mission has already accomplished a great deal during its 12 days in orbit, including the repair of a urine-recycling unit (and other crucial upgrades) which will mean that the ISS crew can be doubled in 2009.

Look back – you never know what you might see

Often the most captivating space pictures come, not from looking out into the depths of the Universe, but back towards home and the Earth – our little round oasis in space. I say this particularly today in light of two images I chanced across whilst researching on the web. The first is from the brilliant Japan Aerospace Exploration Agency (JAXA) probe KAGUYA (also known as SELENE). It’s a picture of the full Earth rising over the lunar limb. It was taken a few weeks ago (September 30th) by the probe’s high definition video camera, as it passed over the Moon’s north pole, at a height of about 100km from the surface. JAXA released it today and well…see for yourself…wow!

The Full Earth rising over the Moon. Credit: JAXA/NHK

In the full sized image you can clearly see Australia against the blue of the oceans and beneath the swirls of the white clouds. What I wouldn’t give to see that view with my own eyes! If you look closely I think that’s the mountainous central peak, of a vast foreground crater, you can see towards the centre of the image. It certainly looks like the centre of the bowl of a crater in reflief running through there. The images from this mission are incredible and you can see many more, as well as some amazing videos, on the JAXA site here. But if you want to feel like you are really floating with the craft over the surface then the HD camera’s video of this ‘Earthrise’ is here (video link).

Lastly then is the second image that caught my eye today – it’s the image at the top of this page (big version here). That’s a picture from the EUMETSAT Meteosat-8 satellite. That orange/white pixelated blob below-centre in the image is, incredibly, the fireball that ensued when a 2-metre wide chunk of rock entered the Earth’s atmosphere and exploded in a searing flash of light. The rock designated 2008 TC3 was picked up by astronomers several hours before it was due to hit the Earth. There wasn’t really any risk to us and the rock most likely broke up in the atmosphere high over a sparsely populated region of Sudan. It would be interesting to know if any parts of the object reached the ground, as meteorites, as they will no doubt be important given that their meteoroid progenitor was relatively well observed prior to impact.

It’s all exciting stuff and reminds us that we should always remember how cool and interesting the Earth is, whilst we are appreciating other worlds and distant places in this incredible Universe we live in.

UPDATE (11.10.08): When I was writing this last night, I completely forgot about the other story which fits nicely into this ‘look back’ theme. It’s a story from ESA’s Venus Express about how astronomers are using the craft’s spectrometer to look at the fingerprints of key molecules in Earth’s atmosphere. The reason they’re doing this is to see if Earth is habitable! Odd, it might seem, but it’s a crucial thing to be able to do if astronomers are going to have any chance of success in determining if other exoplanets are habitable. That’s because from learning about what chemical signatures represent life on Earth, we can begin to formulate some ideas of what we should be looking for on other planets. You can read the full story here.

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.

From Mariner to Mars Express

On the 14th July 1965 NASA’s Mariner 4 flew past Mars and kicked off humankind’s exploration of the red planet with robotic spacecraft*. In the 43 years since that event, our knowledge of Mars has grown at an incredible rate. Not only do we now know a great deal about Mars’ fascinating past but we can get daily (sol-ly?) updates from a small flotilla of spacecraft, on the surface and orbiting the planet. From those early grainy monochrome images of the martian surface we have come all the way to snapping images of our own craft parachuting to the surface; to explore in situ and see much more too. Our missions have captured images from Mars that have shown us: landslides falling down cliffs, dust devils whipping across the martian plains and have generally opened our eyes to the desolate (but stunning) world with which we have become fascinated over the centuries.

For me though one of the best things about our exploration of Mars, aside from the science, is how the images have been able to convey the beauty of the red planet. Not only from a purely aesthetic viewpoint either. The images we see put the complex scientific information we receive into a human context. A high silica content in a region of soil may mean little to anyone but a specialist. But if we can look at an image and say: “that white patch there shows that this region might once have been home to a warm pool of standing water, perhaps even with a bubbling hydrothermal vent” then the whole scene jumps to life.

So it’s with this in mind that I’m posting this image above, one of the Mars Express spacecraft’s latest images. You can view the big version here, to get the full effect. It’s part of a region called Echus Chasma on Mars and has been shaped by all sorts of processes from volcanic events to water erosion. However my favourite quote about the image below, from the ESA news article about these new images, has to be this: “Gigantic water falls may have once plunged over these cliffs on to the valley floor. The original shoreline is still partially visible. The remarkably smooth valley floor was later flooded by basaltic lava.” The fact that we can make such an incredible comment about Mars, to me, shows just how far we’ve come from those early Mariner days.

*There is of course a grand history of observing Mars, with telescopes from Earth, that dates back many decades prior to this.

Image credits: Credits: ESA/ DLR/ FU Berlin (G. Neukum)

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All content copyright Will Gater 2007-09 (unless otherwise stated). The author is not responsible for the content of external links.
Top banner image courtesy: the Millennium Simulation Project and the Max-Planck-Institut für Astrophysik, NASA, JPL, Caltech, Cornell University, University of Arizona, Space Science Institute, NASA Goddard Space Flight Center, Reto Stöckli, Robert Simmon, MODIS Land Group, MODIS Science Data Support Team, MODIS Atmosphere Group, MODIS Ocean Group, USGS EROS Data Center, USGS Terrestrial Remote Sensing Flagstaff Field Center and the Defense Meteorological Satellite Program.