"In addition to the methane spike over Antarctica there was
Is the permafrost's integrity breaking down?
In sum, the half-life of methane in the atmosphere depends upon available hydroxyl ions to break it down. The oft cited values of methane…"
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Monster of the Milky Way
2011.09.17 - Videos were removed, so I've had to replace them.
Black holes on Wikipedia: http://en.wikipedia.org/wiki/Black_holes
An example of graviational lensing caused by a black hole:
Tags: NOVA, The Universe, black holes, cosmology, galaxies, gravity, milky way, science
Replies to This Discussion
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Permalink Reply by Loren Miller on -
Seriously neat stuff! Thanks for posting!
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Permalink Reply by Dallas the Phallus on -
Hope you like (or liked) it.
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Permalink Reply by George on -
http://en.wikipedia.org/wiki/Swift_Gamma-Ray_Burst_Mission
Swift is a multi-wavelength space-based observatory dedicated to the study of gamma-ray bursts (GRBs).
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Permalink Reply by Dallas the Phallus on
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Thanks for the link:
Science goals
- To determine the origin of GRBs. There seem to be at least two types of GRBs, only one of which can be explained with a hypernova, creating a gamma-ray beam. More data is needed to explore other explanations.
- To use GRBs to expand understanding of the young universe. GRBs seem to take place at "cosmological distances" of many millions or billions of light-years, which means they can be used to probe the distant, and therefore young, cosmos.
- To conduct an all-sky survey which will be more sensitive than any previous one, and will add significantly to scientific knowledge of astronomical X-ray sources. Thus, it could also yield unexpected results.
- To serve as a general purpose gamma-ray/X-ray/optical observatory platform, performing rapid "target of opportunity" observations of many transient astrophysical phenomena, such as supernovae.
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Permalink Reply by George on
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Youtube's been busy.
This is the 2nd video today I've seen taken down in the middle of watching it.
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Permalink Reply by Dallas the Phallus on
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Darnit. I watched this weeks ago and have been meaning to post it. I should have done it then.
I'll check back periodically and see if it has been reposted in the future. Otherwise, try your library.
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Permalink Reply by Anne Atheist on -
Try this one: http://www.youtube.com/watch?v=duoHtJpo4GY
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Permalink Reply by Dallas the Phallus on
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This looks like the same program, with slight variation, made for Nat Geo: http://www.youtube.com/watch?v=9WneZlr2d8s
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