The Essential Guide to Astronomy
Sky & Telescope senior editor Alan MacRobert has been covering all aspects of astronomy since 1982.
Astronomy & Observing News
Astronomers turn up a faint red dwarf just a few light-years from the solar system.
By: Alan MacRobert
July 23, 2003
NASA's Mars Global Surveyor has become the latest spacecraft to image the Earth-Moon pair from afar.
The Hubble telescope's newest and best camera has broken the record for imaging the faintest stars and galaxies.
Saturn's large, haze-shrouded moon is covered mostly with dirty ice rather than exotic hydrocarbons, according to the best spectral evidence yet.
An erupting star in Monoceros spreads its light across surrounding gas and dust.
The dazzling supernova of the year 1006 amazed the medieval world. Now astronomers have pinned down its distance and brightness.
Tiny grains blown off from stars that existed before the solar system formed are sifting down all around us.
Results from NASA's MAP satellite strengthen the new cosmology.
For the first time, astronomers have measured a star's side-to-side wobble caused by an orbiting planet.
Celestial News & Events
Here are some tips to help you observe the Leonid meteor shower.
The "anomalous cosmic rays" have finally had their origin pinned down — in the outer reaches of the solar system.
There's no way to avoid it; galaxies really are surrounded by halos of unknown, invisible stuff.
Astronomers have discovered the first planet that orbits one star of a close pair.
A fast worldwide alert enables astronomers to snag their best-observed gamma-ray burst ever.
Black holes with several thousand times the Sun's mass have unexpectedly turned up in the cores of globular clusters.
Your computer may soon be able to join a widened search for ETs. Above: The Parkes radio telescope in Australia.
This year's Perseids performed just about as expected, though hazy, humid skies hindered the view from many places.
A weird object announced last April appears to be an ordinary neutron star, not a strange new type of matter.
Signs of swallowed star groups have turned up in this great globular cluster. . . which may not really be a globular cluster at all.
A well-behaved giant planet orbits the Sunlike star 55 Cancri at the same distance Jupiter orbits the Sun.