Astronomy 
Disciplines & Professions: Astronomy
Astronomy is the scientific study of matter in outer space (beyond Earth's surface and lower atmosphere), especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena. Sometimes referred to as observational astronomy.
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Featured Article
Asteroids
In 1766 the German astronomer Titius observed an interesting regularity among the mean distances of planets known at the time: with two notable exceptions, they seemed to follow a progression, which...
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Featured Blog Post
The Night Sky: December 2009
The Night Sky in December 2009 By Harry J. Augensen Professor of Physics & Astronomy, Widener University Moon’s Phases in Month Full Moon on the 2nd and on the 31stNew Moon on the...
Featured Resource
Around the World in 80 Telescopes - Recorded Videos Archive
"Around the World in 80 Telescopes" was a unique live 24-hour webcast, held April 3-4, 2009, that visited some of the most advanced observatories both on and off the planet. "Around the World in 80 Telescopes" was organized by the European Southern...
Latest News
100 Hours of Astronomy (April 2-5, 2009)
The International Year of Astronomy 2009 Cornerstone Project, "100 Hours of Astronomy," is on track to be the largest single science public outreach event ever. More than 1500 events have...
