441–460 of 479 results

Daylight Phenomena

The Transit of Venus: Tales from the 18th and 19th Centuries

Observers and administrators gather at the US Naval Observatory in Washington, DC, in preparation for the American expeditions to the 1874 transit of Venus.Courtesy US Naval Observatory Library. A magnificent rendezvous between the planet of love and the bright orb of the Sun. One of the most celebrated phenomena in…


Venus at Its Best

Venus is readily visible in the evening sky until late May during this most favorable apparition of its eight-year cycle.

Celestial Objects to Observe

How Yuji Hyakutake Found His Comet

Ever wonder how somebody actually finds a comet, and what happens when he does? Here's one astronomer's story.

Celestial Objects to Observe

Asteroid Occultation in November

North Carolina skywatchers have a chance to see the asteroid 72 Feronia pass in front of an 8th-magnitude star around 2 a.m. Eastern Standard Time on November 5th.

Celestial Objects to Observe

Saturn Hides Another Star

On Tuesday November 25th, Saturn and its ring system glide in front of an 8.3-magnitude star in Gemini, the second time Saturn has occulted a star in 10 days.


Planetary Occultations for 2003

No matter where you live, there are plenty of chances to see an asteroid pass in front of a star this year.

Celestial Objects to Observe

Five Asteroids Meet

There’s a rare imaging challenge in Leo this month for amateurs with CCD-equipped telescopes.


Asteroid Aurora Occults a Star

On the night of September 24–25, minor planet 94 Aurora will pass directly in front of the 5th-magnitude star Chi Geminorum, blocking its light for up to 7 seconds.

Path of Vesta in 2003


Vesta in Virgo

During April, Vesta has many close encounters with members of the Virgo Galaxy Cluster.

Celestial Objects to Observe

Lunar Occultation Highlights for 2003

Dozens of times this year, no matter where you live, the Moon can be seen hiding bright stars in its path. Here's when and where you can watch the Moon occult these stars.

Celestial Objects to Observe

Dust Storm on Mars

A large regional dust storm has enveloped several thousand square kilometers of the red planet and shows no signs of abating.

Celestial Objects to Observe

Crescent Moon Occults Venus

On Sunday evening, October 26th, Venus disappears behind the crescent Moon for observers in South America and Hawaii.


Mercury Transits the Sun

When this innermost planet passes between the Earth and the Sun on May 7th, it will appear as a tiny black "sunspot" in small telescopes.

Asteroid 2002NY40


Catch Hermes on the Fly

Since 1937, Hermes has made eight unseen flybys past Earth. In late October, the asteroid will be 13th magnitude — bright enough to be seen in scopes 10-inches and larger.


Upcoming Asteroid Occultation

S&T illustration. A few minutes before 5:00 a.m. Eastern Standard Time on December 24th, the 170-kilometer-wide minor planet 334 Chicago passes in front of the 8.5-magnitude star SAO97327 in Gemini. The nominal path for this event crosses Philadelphia (at about 9:57 Universal Time) and continues westward across Lake Michigan, just…

Celestial Objects to Observe

Jupiter's Moon Dances

Every six years, for a few months at a time, Jupiter's satellites engage in a wonderful variety of alignments. They're starting up again.


An Observer's Guide to Mars

In 2001 the red planet swung closer to Earth than it had since 1988. It'll be even better in 2003. Here's an observer's guide from the 2001 opposition to whet your appetite for 2003.

Celestial Objects to Observe

Mercury Transit Tales

Mostly clear skies in Europe, the Far East, and Australia meant that many amateurs were able to view this rare event.

Celestial Objects to Observe

Viewing Mercury at Its Best

Fast-moving Mercury can be elusive. But spotting this sparkling little planet is easy if you know where and when to look.


Mars Glides Between Two Nebulae

During the predawn hours of March 5th and 6th, watch as Mars glides between a close pair of nebulae — the Lagoon (M8) and the Trifid (M20).