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Astronomy

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The June 2003 solstice appears at one end of the Thirteen Towers, viewed from the western solar observatory. The sunrise position at the solstice is almost exactly the same as it was during the 4th century B.C.

Return of the Sun Cult

In Peru, scientists discover the oldest solar observatory in the Americas
May 01, 2007 | By Eric Jaffe

Though the exoplanets found to date are in our galaxy, most are about 100 light-years away.

The Planet Hunters

Nevermind the demotion of Pluto to a dwarf planet. Astronomers have found about 200 planets orbiting other stars, and they say it's only a matter of time before they discover another Earth.
October 2006 | By Robert Irion

What Makes a Planet?

Why our solar system just shrank.
October 2006 | By Robert Irion

35 Who Made a Difference: John Dobson

Come one, come all. Share the sky with the father of sidewalk astronomy
November 01, 2005 | By Don Moser

Swan Nebula

Hubble's Last Hurrah

The orbiting space telescope has captured star births and deaths, galactic collisions and the accelerating expansion of the universe. A final tuneup should ensure a few more years of its unique vision
July 2004 | By Laura Helmuth

To Touch the Heavens

Noreen Grice has given the visually impaired a feel for the universe
August 2003 | By David L. Chandler

Astronomy's New Stars

Thanks to new technology, backyard stargazers have traveled light-years of late to join professionals in mapping the heavens
September 2002 | By Timothy Ferris

A Stellar Imagemaker

Smithsonian and NASA's Chandra x-ray observatory sheds new light on the mysteries of the universe
November 2000 | By Michael Kernan

A Celestial News Bureau

Three Smithsonian astronomers run a worldwide news service about what is happening overhead
May 2000 | By Valerie Jablow

Scoping Out the Sky

For everyday folks and presidents, too, the Naval Observatory is a fascinating place to study the stars
September 1998 | By Michael Kernan

A Space Invader Is Here

An intergalactic war is going on, but not the kind we used to read about in science fiction magazines
April 1998 | By John P. Wiley, Jr.

More Violence Overhead

Bursts of gamma rays have been a mystery for 30 years; Now, with new satellites, we have some clues
March 1998 | By John P. Wiley, Jr

Phenomena, Comment & Notes

While Comet Shoemaker-Levy 9 is history, space scientists are just beginning to piece together the details of its pyrotechnic encounter with Jupiter last July
January 1995 | By John P. Wiley jr.


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