The Essential Guide to Astronomy
Sky & Telescope senior editor Alan MacRobert has been covering all aspects of astronomy since 1982.
Astronomy & Observing News
This year's Perseids performed just about as expected, though hazy, humid skies hindered the view from many places.
By: Alan MacRobert
July 23, 2003
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.
Celestial News & Events
The crescent Moon forms two beautiful conjunctions with the two brightest planets during twilight Wednesday and Thursday.
Dead for three years, the Hubble Space Telescope's NICMOS camera is again providing infrared views of the universe.
New, sharper maps of the cosmic microwave background radiation are telling astronomers they're on the right track.
Maybe the Big Bang wasn't the beginning, but only the latest in an endless cycle of destructions and rebirths.
They're not open clusters and they're not globulars; astronomers have found a third kind of star cluster inhabiting some galaxies.
By carefully watching the brightnesses of 52,000 stars, astronomers have found 43 that have small, dark objects periodically crossing their faces.
After successfully settling into orbit around the Red Planet, NASA's Mars Odyssey has begin its 2½-year mapping mission.
A spiral galaxy's arms trail behind when it rotates, right? Not always.
The cosmic chess piece, the Horsehead Nebula, is seen in all its glory through the eyes of the VLT.
The lunar surface consists of more than just craters and mare. Here's a guide to some of the other lunar features.