A 10,000-year-old stellar corpse, called a pulsar, is the first one known that only "blinks" in gamma rays, as discovered by NASA's Fermi Gamma-ray Space Telescope.
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Hubble Servicing Mission 4
Shuttle astronauts return to extend the life of the famed observatory
Science Mission Directorate
NASA studies the universe from the smallest particles of matter and energy to the biggest questions of the evolution and structure of the cosmos.
Latest Features
Fermi Telescope Discovers Gamma-Ray-Only Pulsar
Two Black Holes Teach Astronomers a Lesson
Observations of two different systems -- each containing stellar-mass black holes -- are showing astronomers how much they have yet to learn.
NASA's Spitzer Gets Sneak Peak Inside Comet Holmes
When comet Holmes unexpectedly erupted in 2007, professional and amateur astronomers around the world turned their telescopes toward the spectacular event.
More Features
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Splashy Portrait Helps Explain How Stars Form
Different wavelengths of light swirl together like watercolors in a new, ethereal portrait of a bright, star-forming region.
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A Quest for Astronomy's 'Holy Grail'
Sarah Seager hopes her exoplanet research will help "complete the Copernican Revolution."
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Celebrating 10 Years of Hubble Heritage Images
The landmark 10th anniversary of the Hubble Space Telescope's Hubble Heritage Project is being celebrated with a "landscape" image from the cosmos.
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Infrared Echoes Give Spitzer a Supernova Flashback
Hot spots near the shattered remains of an exploded star are echoing the blast's first moments, say scientists using data from NASA's Spitzer Space Telescope.
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A Star That Bursts, Blinks and Disappears
Astronomers are reporting on a strange case where one of the littlest of stars "twinkled" with gamma rays, X-rays, and light -- and then vanished.
Latest News Releases
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Hubble Telescope Media Teleconference Today at 4 P.M. EDT
10.17.08 - NASA will host a media teleconference today beginning at approximately 4 p.m. EDT, to discuss issues recently experienced with the Hubble Space Telescope.
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NASA's Fermi Telescope Discovers First Gamma-Ray-Only Pulsar
10.16.08 - About three times a second, a 10,000-year-old stellar corpse sweeps a beam of gamma-rays toward Earth.
 "image from space of the sun rising against Earth's horizon")
 "artist's rendering of ACS Repair")
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