Cosmic dust may reveal some of the uncovered secrets of our universe
December 2008 | By Anika Gupta
The first biography of Galileo Galilei resurfaces and offers a new theory as to why the astronomer was put on trial
August 12, 2008 | By Mike Price
To gain insight into the most mysterious objects in the universe, astronomers shine a light at the chaotic core of our Milky Way
April 2008 | By Robert Irion
One of the year's best meteor showers comes in December. Here's how to view the action
December 01, 2007 | By Marian Holmes
A black hole that trumps all others in size was detected by two NASA satellites and announced by researchers, led by Andrea Prestwich at the Harvard-Smithsonian Center for Astrophysics. The black hole is a hefty 24 to 33 times larger than the Sun (the previous best was 16 times larger).Sitting 1....
November 09, 2007 | By Megan Gambino
J. Allen Hynek got the call at 6:30 p.m., October 4, 1957.The associate director of the Smithsonian Astrophysical Observatory, near Boston, hung up and told a colleague: "There's a Russian satellite up."Sputnik's launch shocked the public: scientists were surprised only that the Russians did it fi...
October 02, 2007 | By Beth Py-Lieberman
An ocean on Mars. An Earth-like planet light years away. The evidence is mounting, but are astronomers ready to say we're not alone?
July 01, 2007 | By Eric Jaffe
In Peru, scientists discover the oldest solar observatory in the Americas
May 01, 2007 | By Eric Jaffe
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
Why our solar system just shrank.
October 2006 | By Robert Irion
Come one, come all. Share the sky with the father of sidewalk astronomy
November 01, 2005 | By Don Moser
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
Noreen Grice has given the visually impaired a feel for the universe
August 2003 | By David L. Chandler
Thanks to new technology, backyard stargazers have traveled light-years of late to join professionals in mapping the heavens
September 2002 | By Timothy Ferris
Smithsonian and NASA's Chandra x-ray observatory sheds new light on the mysteries of the universe
November 2000 | By Michael Kernan
Three Smithsonian astronomers run a worldwide news service about what is happening overhead
May 2000 | By Valerie Jablow
For everyday folks and presidents, too, the Naval Observatory is a fascinating place to study the stars
September 1998 | By Michael Kernan
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.
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
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.