421–440 of 452 results

Asteroids

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

Celestial Objects to Observe

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.

Planets

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.

Occultations

Crescent Moon Occults Venus

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

Celestial Objects to Observe

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

Celestial Objects to Observe

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.

Celestial Objects to Observe

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…

Planets

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.

Planets

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.

Planets

Mercury Transit Tales

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

Planets

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.

Planets

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).

Variable Stars

A Star Prepares to Blow Its Top

Easily found with the naked eye, 4th-magnitude Rho Cassiopeiae may be getting ready for an enormous mass ejection in the next few months.

Occultations

Saturn Transits the Crab

During the night of January 4–5, North American observers are well positioned to watch Saturn transit the face of M1, the Crab Nebula. But will the glare from the planet obscure the nebula?

Paths of Ceres and Melpomene

Celestial Objects to Observe

Ceres and Melpomene in Binoculars

With paths that crisscross in Cetus, the Whale, these two asteroids make fine observing targets for the rest of 2002.

Asteroid 2002 NY40

Asteroids

Asteroid Flyby Seen Worldwide

Last weekend's close encounter between Earth and asteroid 2002 NY40 was seen by amateur astronomers worldwide.

Roy Tucker

Asteroids

Asteroid Hunters Receive Grants

Five amateur astronomers specializing in the observation and early detection of Earth-crossing asteroids and comets were each awarded Shoemaker Near-Earth Object Grants from the Planetary Society.

Path of 2002 NY40

Celestial Objects to Observe

A Close Encounter with an Asteroid

Over four weeks, the brightness of asteroid 2002 NY40 will brighten by more than 3,000 times. It will peak at magnitude 9.3 (bright enough to be seen through a small telescope or large binoculars) as it drifts rapidly through the northern Milky Way on the night of August 17–18. This…

Mare Australis

Moon

Australe: A Mare on the Edge

This mare is a challenging sight; view it July 16th to 19th and August 12th to 15th.

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