Saturday, 29 August 2009

Light through a lens

Surrey’s skies were a source of fascination yesterday night, as astronomers of all skill levels gathered at the University of Surrey’s Varsity Centre in Guildford for The Great Look Up.



The event, organised by the university itself together with the Guildford Astronomical Society to commemorate the International Year of Astronomy, comprised of a number of other features besides the main stargazing session. A plasma screen linked up to a telescope showed the moon’s craters in detail, and an inside exhibition, not to mention a barbecue and drinks, gave those getting chilly outside a chance to warm up.

Despite the ominous rumbling of thunder earlier on in the evening, the event remained rain and relatively cloud-free. While everyone waited for the light to wane, the night kicked off with some guest speakers, including BBC correspondent and former Tomorrow's World presenter Maggie Philbin.

Philbin said the moment she first got hooked on astronomy was when she first saw Saturn through a telescope. “I remember thinking, 'Oh my God, Saturn really does have that ring!'", she said. “Children think that science is all about lab coats and people with funny hair. But events like this are really important in getting kids into science, and seeing it for themselves.”

Dr Stuart Eve, of Surrey Satellite Technology Ltd (SSTL), discussed some of the Guildford-based company's previous and current projects. SSTL builds small satellites, ranging from the smallest at the size of a basket ball to the biggest at two metres tall.

"The way forward is to have groups of small satellites that are linked up," said Eve. "If you think of a PC on your desk, it's useful as it is but it's much more useful when it's linked together with other PCs through the internet."

As a future project, SSTL is planning to land a small satellite on the moon to carry out seismometry in order to gain knowledge about its interior structure.

The end of the talks meant it was now dark enough for the stargazing to commence. With the floodlights switched off, and replaced by red lighting to preserve people’s night vision, the scene was set.

Telescopes big and small were trained on various celestial objects of interest, including Jupiter, the Andromeda galaxy and of course the moon. Visitors drifted from one telescope to another in search of the next interesting thing to set one’s sights on in the night sky. I opted for the innately British logic of heading towards the telescope with the biggest queue, and was treated to a stunning view of Jupiter's bands, as well as a hazy sprinkling of very distant stars in a globular cluster.

There was also a 'Galileoscope' on show, which allowed visitors to witness what the pioneering astronomer himself would have seen when he looked through his telescope 400 years ago. Next to it was a telescope based on a design by Kepler, Galileo’s contemporary, created a year after Galileo's but with a much greater magnification.

If this has whet your appetite for astronomy and beyond, then there’s much more to come: as the organisers said, The Great Look Up is a prelude to The British Science Festival, which starts next Friday. I can feel my brain growing already!

Globular cluster image courtesy of Southern African Large Telescope (SALT) project.
Video shot by myself at The Great Look Up.

Thursday, 27 August 2009

Stargazing in Surrey - The Great Look Up


Arming myself with a pair of stocking-filler binoculars and a waterproof, I think I'm all set for The Great Look Up tomorrow night. More than 250 people so far are expected to turn up to the event in Guildford, run by the University of Surrey and the Guildford Astronomical Society, which invites amateur astronomers, experts and complete beginners to direct our gaze upwards at Surrey's skies in search of heavenly bodies.

The event, a prelude to the British Science Festival, is commemorating the International Year of Astronomy, celebrating 400 years since Galileo first look up at the sky with a telescope.

With several telescopes available at the site, thankfully I don't have to worry about having to make do with just my plastic binos all night, which at a paltry 4 x 30 will barely detect so much as a plane in the night sky. And with guest speakers, a barbecue and drinks to warm up the keen astronomers, it looks set to be a fun and lively event.

I'll be posting a report of the event, together with snaps of whatever I can eek out of my lowly camera (come on, night settings, don't let me down - I should really invest in a good tripod, but my sister's head will have to do for now). If you're interested in going to the event, register your interest at this link, and keep fingers crossed for the weather!

Monday, 24 August 2009

Where galaxies and understanding collide


Galaxy collisions, solar flares and creatures which live on “frozen fart gas” – just a few topics covered in the Your Universe festival at University College London (UCL), run for the first time this year and which ended yesterday. Through a series of free talks and exhibitions organised by UCL to celebrate the International Year of Astronomy 2009 celebrating 400 years since Galileo first looked up at the sky with a telescope, complex topics such as how galaxies collide and the magnetic poles of the Earth were made accessible thanks to enthusiastic speakers and great visuals.

The fact that, instead of being outside on such a warm, sunny weekend, the audiences chose to spend it inside a lecture theatre is testament to how enthralling the talks were. I went to one session on Saturday, and all four on Sunday (unfortunately I couldn't go to more), and had the chance to listen to talks given by a range of speakers including Dr Mark Westmoquette and Dr Lewis Dartnell as they brought the universe to life with the aid of stunning imagery and videos.



















Left: A visitor views the sun in 3D. Right: An exhibit shows how light is broken down into its component colours through a spectroscope

Westmoquette took us through the images caught by the Hubble Space Telescope (HST), including one of the Hubble Deep Space field, a view stretching to the visible horizon of the universe approximately 12 billion light years away. Through these vibrant pictures, Westmoquette showed us how stars are formed in dense clouds of gas, and, in a second lecture on the Sunday, how galaxies actually collide (although stars contained in the galaxies very rarely do – an intriguing thought which certainly appeared to have the audience transfixed).

Dr Westmoquette shows the aftermath of a colliding galaxy, seen from the HST

The final talk of the festival was given by Dartnell in a session which, as organiser Dr Francisco Diego said, brought together Galileo and Darwin, who is also being commemorated this year. In his talk 'Astrobiology: the search for life beyond Earth', Dartnell delved into the new pioneering field of astrobiology, which fuses biology and physics among other scientific disciplines in its quest for signs of life on other planets and moons.

In it, Dartnell covered issues such as what are the ideal conditions for life, how in one of the most inhospitable environments on earth, a creature is able to survive on frozen methane, or “frozen fart gas” in cruder terms, and what an alien might look like. Just in case you were wondering, according to Dartnell, the chances of extraterrestrial life resembling Spock or Chewbacca is more than a little unlikely, to put it mildly – sorry to disappoint.

But in such a new and exciting field, which is just in its infancy, the possibilities for future avenues of research is vast, and will hopefully help inch us further towards the illusive goal of finding out how life began on our own planet.

The exhibition, which included a 3D sun and a demonstration showing the timeline of the universe since the Big Bang, enabled visitors to get interactive with science, with assistants on hand to answer any queries.

The Your Universe festival was a fantastic opportunity to meet the experts, and all for free. Fingers crossed it’ll be back next year.

Top image courtesy of the Hubble Space Telescope. All other images taken by myself of the UCL exhibition and talks.