NASA’s Wide-field Infrared Survey Explorer took its last image of the sky in February, 2011. But while it was active it surveyed the entire sky several times in the far infrared, so its data archive is a vast treasure trove just waiting to be dug into (hmmm, I should try to squeeze another metaphor into there).
Anyway, lookee what the astronomers found:
Cooool. Literally! That’s dust surrounding the star Alpha Camelopardalis, what appears as a fairly non-descript star in a faint, non-descript constellation. At least, to the eye. When seen in the IR, you get this shocking view. Also literally.
Alpha Cam is a massive, luminous star: 50 times as hefty as our Sun, and blasting out perhaps a million times as much energy. But it’s far away (3000 light years, maybe, the distance is not well-known) and behind a lot of dust, dimming our view. It’s barreling through space at a pretty good clip, and emitting a wind of subatomic particles as it does. This wind expands, slams into the surrounding dust, and sculpting it into this giant bow shock formation.
In this false color ...
Full story at http://blogs.discovermagazine.com/badastronomy/2011/03/27/a-giraffes-shocking-neck/
Posts
No comments:
Post a Comment