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Anna Richards
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Anna Richards

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Earth originally shared:
 
What happens when a Coronal Mass Ejection hits the Earth?
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Anna Richards

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Fraser Cain originally shared:
 
Weekly Space Hangout for Jan. 26th, 2012

Another edition of our weekly space hangout. This week we talked about a week of space remembrance, solar storms, Newt's plans for a 2020 lunar base, arsenic and old news, black holes and their galaxies and the death of Phobos-Grunt.

We were joined by +Philip Plait, +Pamela Gay, +Alan Boyle, +Nicole Gugliucci and +Ian O'Neill.
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Anna Richards

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Universe Today originally shared:
 
The internets to the rescue for seeing the aurora!
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Anna Richards

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So much for my idealistic vision of common heritage of mankind...
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Anna Richards

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Randy Halverson originally shared:
 
Colorado - Canyon of the Ancients area last summer.
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Anna Richards

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Carl Zimmer originally shared:
 
I've written an essay about the age of the Earth, and how one of the greatest physicists of all time made a huge blunder in estimating it.

The occasion for the essay was the Annual Edge Question, organized by literary agent John Brockman. This year he asked writers and scientists to name a beautiful, elegant scientific explanation. I chose Lord Kelvin's explanation of how the Earth formed--just 10 million years ago, he declared. I've reprinted it in full at the Loom. There's also a link to Brockman's full set of responses, all 187 of them.
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Anna Richards

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Camilla Corona originally shared:
 
Introduction into Aurorae - Part IV

Are you bored yet? I hardly think so...let's keep learning about why we see these magical lights.

The aurora is caused by the interaction of highenergy particles (usually electrons) with neutral atoms in the Earth’s upper atmosphere. These high energy particles can “excite” (by collisions) valence electrons that are bound to the neutral atom. The excited electrons can then return to their initial, lower energy state, and in the process release photons (light particles). This process is similar to the discharge in a neon lamp.

Any particular color of the aurora depends on a specific atmospheric gas and its electrical state, and on the energy of the particle that hits the atmospheric gas. Atomic oxygen is responsible for the two main colors of green (wavelength of 557.7 nm) and red (630.0 nm).
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Anna Richards

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Randy Halverson originally shared:
 
Another lightning shot from last July in South Dakota.
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Anna Richards

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Fraser Cain originally shared:
 
Fraser Cain is hanging out with 1 person right now in a live Hangout On Air!Pamela Gay
Fraser Cain's profile photoPamela Gay's profile photo
Fraser Cain was in a video call with 1 other
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Anna Richards

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Philip Plait originally shared:
 
An awesome stop-motion animation featuring one of my many man-crushes, +Zach Weiner, drawing for One Minute Physics on why some stones are round and others flat. Pretty cool! And Zach, next time you draw people in space, one of them should be an astronomer. Sheesh.
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Chronic stargazer & cloud watcher, law explorer and letters lover. Currently studying shipwrecks.