Tag Archive for: cosmology

Kielder Observatory trip – 26th February

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Another month, another four schools, another 30 students; we seem to be making a habit of trucking people up to the Kielder Observatory. No snow this time, so our intrepid driver Steve bounced us up the track, and we managed to get some good observing in before the high cloud closed over. Luke from the Observatory then gave us a joyous romp through the exciting bits of astronomy and cosmology (absorption spectra! Woo! — no, really, I did go a bit giddy about absorption spectra), and all too soon we were back on the coach heading home.

The thin cloud layer and absent moon made for a relatively lousy night for photography, so there aren’t many shots:

Here’s Becki welcoming us to the Observatory, as we huddle in the one vaguely-warm part of the site and get properly dark-adapted:

Luke’s observing station, with 3- and 5-inch refractors set up and ready to go:

…and a group observing from that station, a few minutes later:

The 16” Reflector was in use. Here it is slewing across the sky while my shutter was open:

…and here’s an arty shot of the housing. The smudge of stars left of centre is – if I’m not mistaken – the Pleiades cluster.

Finally, my best shot of the night: Becki’s observing group out on the deck, with Orion directly above the telescope. Top left of Orion is Betelgeuse, looking much more red than Rigel, down the bottom-right of the constellation.

As ever, it’s quite a trek out to the Observatory (as Becki put it: Kielder is the most remote village in England, so the Observatory is outside the most remote village), but it’s well worth it, particularly if you’re lucky with the weather. Keep an eye on Kielder’s Events page (or this handy availability checker) and book yourself into a session!

Big thanks to the Observatory staff, and we’ll hope to be back again soon.

Gravitational waves – The Think Physics Guide

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As a project with ‘Physics’ in our title, it hardly seems possible not to be talking about gravitational waves in the office this morning. We read the reports avidly, we got all excited, and we also realised that we’re hardly the experts on this. So here’s our brief run-down of the really useful stuff we’ve found from better journalists than ourselves and more informed cosmologists:

First up, an excellent film from the New York Times, which sets out what the LIGO experiment in Louisiana and Washington has done:

The rest of the Times’ report is a good solid overview of what’s happened. Through the arms-length reporting you can glimpse the level of excitement and the significance of the work.

If animation is more your style, this primer from PhD Comics will spin you through the bumpy landscape of gravitational waves:

Hooked? Fascinated? Excited? The New Yorker has an outstanding long article about the inside story of the discovery:

“Space and time became distorted, like water at a rolling boil. In the fraction of a second that it took for the black holes to finally merge, they radiated a hundred times more energy than all the stars in the universe combined. They formed a new black hole…

The waves rippled outward in every direction, weakening as they went. On Earth, dinosaurs arose, evolved, and went extinct. The waves kept going. About fifty thousand years ago, they entered our own Milky Way galaxy, just as Homo sapiens were beginning to replace our Neanderthal cousins as the planet’s dominant species of ape. A hundred years ago, Albert Einstein, one of the more advanced members of the species, predicted the waves’ existence, inspiring decades of speculation and fruitless searching.”

It’s a beautifully-written piece, and it really captures the human aspect of this – of hundreds of physicists around the world experiencing that moment of discovery. It’s an image that’s ingrained in popular conceptions of how science works, of Archimedes leaping out of his bathtub and exclaiming ‘Eureka!’ The reality, of course, is usually very different. Science tends to proceed in small steps, miniature breakthroughs in labs and desks and computers around the world, inching forwards piece by piece. But the LIGO work appears to be a genuine breakthrough, and the excitement is both real and hard-earned.

That’s also the theme of yesterday’s BBC Radio 4 Inside Science Special:

“It is the cleanest signal you can imagine… you have to feel fantastic for those 800 scientists, who have been spending – some of them – decades of their careers working towards this first detection.”
— Dr. Andrew Pontzen, UCL

The programme also hears from the leading UK scientist on the project, Prof. Sheila Rowan of the University of Glasgow. You can get a good sense of how giddy everyone is about this by listening to her impression of the signal ‘chirp.’

Do take a look at the LIGO experiment website, but for now, the final words:

IOP talk: Formation of Extrasolar Planets

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Dr. Ken Rice from the University of Edinburgh’s Institute for Astronomy will be here at Northumbria University on 18th June, speaking on the formation of extrasolar planets. To date we’ve confirmed the existence of almost 2,000 planets beyond our solar system – come and discover how they formed and evolved in this Institute of Physics-organised lecture.

The event will take place in room A003 in the Ellison Building, 7–8pm. All welcome.

For more information, the IOP have a glossy flier (PDF, 1Mb), and a Facebook page.