astronomy

Comet C/2007 N3 (Lulin), discovered in July 2007, should be the highlight comet of this season. It's predicted to reach about 5th magnitude in late February, so it should be easily seen in binoculars. It may even become detectable with the unaided eye in a dark, moonless sky.

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Lulin’s closest approach to Earth, 0.41 a.u. (61 million km), occurs on February 24th, when the comet may reach a peak of magnitude 5. By now it's visible in late evening (after rising around the end of astronomical twilight) and remains in view for the rest of the night.

And it's speeding along at just over 5° per day! That's about 1 arcsecond every 5 seconds of time, enough to show obvious motion during a short telescopic observing session. Similarly, that's 1 arcminute per 5 minutes of time if you're using binoculars.

Galaxies, moons, supernovae, planets, nebulae, dust... all of it. The Universe is saturated in beauty, and our technology is starting to catch up with it. We can capture the glowing glamor of the cosmos, and stare in awe and rapture.

Every year, more and more images become available of astronomical objects. And every year I try to pick my favorite ten to post here at the year's end (check out 2007 and 2006). This year, the ten I have chosen have a significant distance bias; they lean toward being very close. But don't fret: they range in distance literally from the closest to the farthest objects we can see.

This list is mine, and has my bias. I choose the pictures for beauty, for scientific interest, for both or for neither. Sometimes they're just cool, and sometimes they are a little frightening, but I hope they all will make you think, and move you in some way. Under most images is a link to embiggen them quite cromulently.

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Why did I pick this one? Because it is direct evidence of humans reaching out to another planet. Not only that, it's taken by another spacecraft we had sent there, a robotic emissary that was already in orbit taking high resolution images of the Red Planet. Showing incredible skill and foresight, the engineers here on Earth told HiRISE where to point, and at the right moment they snapped this proof that our grasp sometimes equals our reach.

I love this picture. It's simple enough, just a few pixels showing the fuzzy shape of the lander and its drogue. If you look carefully, you can see the shroud lines, too, and make out the shape of the parachute. I think that's why this image speaks to me so profoundly: it's not grand, it's not gloriously colored, it's not presupposing, yet the depth of its meaning is colossal.

I am very pleased to finally announce my Big News: the Bad Astronomy Blog is now a part of Discover Magazine Blogs.

Even more bad news under the save astronomy banner: The Times is running a story today suggesting that the famous telescope at Jodrell Bank faces closure.

I'd gathered from the list of possible cuts on the Save Astronomy website that Merlin was under threat but I hadn't even considered the idea that this might mean that the Lovell Telescope itself would be under threat.

This whole STFC nonsense was depressing to start with, it's almost impossible for me to find the right word to describe my mood now.
Is this it? Has this country given up on physics and astronomy? Has this government now decided that it's really not worth the time or money? I disagree. I'd try and say why I disagree but there's little point when Nigel Hawkes at The Times has done a far better job...

In Galileo’s time, nighttime skies all over the world would have merited the darkest Bortle ranking, Class 1. Today, the sky above New York City is Class 9, at the other extreme of the scale, and American suburban skies are typically Class 5, 6, or 7. The very darkest places in the continental United States today are almost never darker than Class 2, and are increasingly threatened. For someone standing on the North Rim of the Grand Canyon on a moonless night, the brightest feature of the sky is not the Milky Way but the glow of Las Vegas, a hundred and seventy-five miles away. To see skies truly comparable to those which Galileo knew, you would have to travel to such places as the Australian outback and the mountains of Peru.