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ASTR 1230, Whittle [Fall 2009]. Lecture Notes

ASTR 1230, Whittle [Fall 2009]. Lecture Notes Last modified September 2008 by rwo Text copyright © 1998-2008 Robert W. O'Connell.
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Roughly one out of every 37 to one out of every 70 sunlike stars in the sky might harbor an alien Earth, a new study reveals. These findings hint that billions of Earthlike planets might exist in our galaxy, researchers added. These new calculations are based in data from the Kepler space telescope, which in February wowed the globe by revealing more than 1,200 possible alien worlds, including 68 potentially Earth-size planets. The spacecraft does so by looking for the dimming that occurs when a world transits or moves in front of a star. New estimate for alien Earths: 2 billion in our galaxy alone New estimate for alien Earths: 2 billion in our galaxy alone
Planetarium - Interactive star map and virtual sky
Beautiful Planet - Oh I so want to go to the ISS!

Beautiful Planet - Oh I so want to go to the ISS!

Indian Ocean Maldives “The sunny side of life” is a catchphrase used to attract tourists to the Maldive Islands. Well it certainly looks heavenly from the ISS. Time to order a large drink, you know, one with a lot of fruit and a little umbrella, then stretch out on a hammock and just enjoy life, watching what I can only imagine a marvelous sunset. Image Credit: NASA/ESA, Russian Federal Space Agency, Maxim Suraeva and Oleg Kotov I for one am very pleased that the astronauts on the ISS (heroes in my humble opinion) keep sharing images of our beautiful planet with the rest of us.