Tag Archives: TheBadAstronomer

Fireworks from a century-old nova

Nova GK Persei is a white dwarf star that threw an epic fit. It steals material from its companion star, and this material piles up on its surface, heated and hugely compressed. All at once it underwent catastrophic nuclear fusion, detonating like a bomb, blasting countless trillions of tons of matter outward at 1000 km/sec. The light reached Earth in 1901, and over the ensuing century we have watched the debris expand like fireworks.

Read more: http://www.slate.com/blogs/bad_astronomy/2013/01/24/nova_explosion_gk_persei_expanding_debris_animation.html

Video credit: Tiina Liimets et al.
Audio: Kevin MacLeod, “Mechanolith”, incompetech.com

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The Moon in 2012… hour by hour

Folks at the NASA GSFC Scientific Visualization Studio created this amazing animation showing our view of the Moon over the entire year of 2012 with time resolution of *one hour*! The tipping, tilting, and rocking are due to the Moon’s elliptical orbit coupled with its tilt. I explain this using captions in the video itself.

Music is “Five Armies” by Kevin MacLeod, used under the Creative Commons license. You can find it at http://incompetech.com/m/c/royalty-free/index.html?genre=Soundtrack

More info: http://blogs.discovermagazine.com/badastronomy/2012/03/02/nasa-goddard-rocks-the-moon/ ‎ [Goes live 3/2]

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