Astronomy
Return of the Sun Cult
In Peru, scientists discover the oldest solar observatory in the Americas
Time for a Change
One professor's mission to revise the calendar
The Planet Hunters
Astronomers have found about 200 planets orbiting other stars, and they say it's only a matter of time before they discover another Earth
What Makes a Planet?
Why our solar system just shrank
An Interview with Rob Irion, Author of "The Planet Hunters"
Rob Irion spoke with Amy Crawford about his article, "The Planet Hunters"
35 Who Made a Difference: John Dobson
Come one, come all. Share the sky with the father of sidewalk astronomy
Hubble's Last Hurrah
The orbiting space telescope has captured star births and deaths, galactic collisions and the accelerating expansion of the universe
To Touch the Heavens
Noreen Grice has given the visually impaired a feel for the universe
Astronomy's New Stars
Thanks to new technology, backyard stargazers have traveled light-years of late to join professionals in mapping the heavens
Stars in Their Eyes
The exquisite telescopes crafted by Alvan Clark and his sons helped make the last half of the 19th century a golden age of astronomy
Mapping Galactic Foam
Smithsonian astronomer Margaret Geller plotted the bubble structure of the universe. Now she's working to find out how it got that way
A Stellar Imagemaker
Smithsonian and NASA's Chandra x-ray observatory sheds new light on the mysteries of the universe
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