astronomy

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When I read that an impact had been spotted on Jupiter, I figured it was somewhere other than the equator, which would be a bulls-eye. Even Shoemaker-Levy, a huge comet broken into a string of pieces, slammed like a series of machine gun bullets into Jupiter near its south pole.

But this one was bigger. See above. And read the story. That black hole in the side of Jupiter is nearly as big as our whole planet. [Woops, not quite. DFR points out in a comment below that the black spot is certainly a moon shadow. Jupiter has four big ones, they do make shadows like that, they are all on the planet’s equator, they’re all a good deal smaller than the Earth (being moons), and I should have known better. Anyway…

And nobody saw it coming.

One good thing is that Jupiter is kind of a crap sweeper, gliding around the inside edge of the outer solar system with a nice big gravitational field, sucking up debris that might otherwise clobber one of your inner planets, such as ours.

By the way, that bright point of light in the eastern sky these evenings is Jupiter. The smaller points of light on either side of it and close by are its moons. The clear-eyed can make them out on a dark night. And they’re quite obvious through good telescopes.

Oh, by the way, there’s a total solar eclipse happening right now in Asia. The NASA server with cool info seems to be hosed. So do some other sites I’ve checked (not that my connection is good right now… we’re back to high latencies again). But Shadow & Substance is on the scene and covering it live. Lots of fun stuff there.

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Nova or lens flare?

I’ve been shooting stars and planets the last few nights (see here and here), as the Moon passes by Mercury, Jupiter and Venus. It’s the kind of thing obsessives do, when they combine devotions to astronomy and photography. Anyway, I thought it would be fun to identify a few of the stars in the neighborhood Venus was visiting, when I found a star where none should be.

Take a look at the two photos above. The original one on the right is here. On that one I note names and other data for all the main stars in the shot other than the bright blue one near the middle. It’s not on any start chart I’ve consulted. Sooo… what is it?

My fantasy was a nova of some kind. But I doubt that’s it. Judging from the color alone, I’d say it’s a lens flare. Meanwhile it was fun doing detective work with The Kid.

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My son found the perfect way to interrupt my absolute concentration on work this evening: by pointing out that the Moon, Venus and Jupiter were forming a jewel-box of an arrangement in the evening sky. And sure enough, they were. So I took a bunch of shots, of which I kept the two that comprise this set here.

If you’re in the West, somewhere amidst the Pacific or the Far East this evening, you’ll see it too.

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