After weeks of having a face free of large blemishes, the Sun now sports a Jupiter-sized spot, large enough to be visible without magnification if you use a safe solar filter.
LINEAR Puts in an Appearance
Comet LINEAR is visible to midnorthern observers until late June, after which it becomes a Southern Hemisphere object.
Two Comets Head North
Early in June midnorthern observers can see Comet NEAT high in the western evening sky at about 4th magnitude and LINEAR emerging low in the west-southwest a little past its prime.
Five Planets In a Twilight Sky
Until early April, all five planets that are ever visible to the unaided eye shine at once during dusk.
Will the June Boötids Return in 2004?
A strong meteor shower may — or may not — return to our skies on the evening of June 23rd.
Photographing the Transit of Venus
Here's how to capture your own keepsake portrait of this upcoming rare, historic, and first-in-a-lifetime event.
Bradfield's 18th Comet
Indefatigable comet hunter William Bradfield has found another (his 18th); it's currently visible low in the northeast before sunrise.
The Double Comet Show of 2004
Comets NEAT and LINEAR may reach modest naked-eye brightness in April and May.
The Moon Goes Dark
Europe and Africa are prime viewing areas for the total eclipse of the Moon on May 4—5.
One Planet, Two Moons, Three Shadows
This coming weekend, weather permitting, almost anyone with a telescope in North America (and northwestern South America) can see the shadows of three Jovian moons at once.
One Planet, One Moon, and Three Shadows
Clouds and poor seeing plagued much of North America on the night of March 27–28, 2004, but some observers still managed to see the remarkable triple shadow transit on Jupiter.
A Disturbance In Jupiter's Clouds
A new, 40°-long, diffuse blue feature is currently visible at the interface between Jupiter's South Equatorial Belt and the Equatorial Zone.
A Faint Southern-Sky Visitor
Although likely never brighter than 9th magnitude, Comet C/2002 O7 passes by some interesting sights during its tour of the southern sky.
The Changing Face of Comet Encke
For Northern Hemisphere observers, this will be Comet Encke's closest approach to Earth since November 1838.
Two Comets in 2004
A pair of comets will grace the evening sky in May; Southern Hemisphere observers will have fine views of both.
The 2003 Leonids: Back to Normal?
Interactions between Earth and a pair of debris trails left by Comet Tempel-Tuttle may make for some interesting, albeit brief, Leonid meteor activity this year.
Leonids '02: A Sprinkle in the Moonlight
Norwegian amateur Jarle Aasland caught this 2002 Leonid streaking past the bright star Aldebaran in Taurus, the Bull, at 4:57 UT on November 19th. He used a Nikon D100 (digital SLR) set to ISO 800 and a 5-second exposure.Courtesy Jarle Aasland. I arrived at the Sky & Telescope offices this…
Leonids 2002: The Grand Finale
Despite the presence of a full Moon, the possibility of seeing one last Leonid storm should bring observers out in force.
Moon Occults Mars
During the predawn hours of Thursday, July 17th, the waning gibbous Moon will cover Mars for skywatchers in southeastern Florida, the Caribbean, and parts of Central and South America.
A Naked-Eye Spot Returns
The immense sunspot group that on November 4th ejected the largest solar flare ever recorded has rotated around the Sun and is back for a second pass across the Earth-facing side of the solar disk.