401–420 of 457 results
Asteroid 2 Pallas

Celestial Objects to Observe

Pallas in the Realm of the Galaxies

Catch Pallas, the year's brightest asteroid, as it traverses the Virgo Galaxy Cluster.

John Locke

Celestial Objects to Observe

The Discovery of the Perseid Meteors

It took the mindset of a detective to discover the truth behind the meteors of mid-August.

Celestial Objects to Observe

Delta Scorpii Still Showing Off

For the fourth summer in a row, the head of the bright constellation Scorpius looks a little unusual.

Deep Sky

When Will RS Ophiuchi Next Blow Its Stack?

This recurrent nova last went off in 1985. It could do so again almost any night. By catching this nova on the rise, you’ll help professional astronomers turn their “big guns” on it.

Variable Stars

X Sagittarii: A Variable Star Toward Our Galaxy's Heart

This naked-eye variable should be near peak brightness every Wednes-day night during August, September, and October.

Celestial Objects to Observe

Chi Cygni Rises Toward Maximum

Catch a orange-red variable star in Cygnus, the Swan, as its brightness peaks in early July.


Meteors That Changed the World

When "shooting stars" make the transition from heaven to earth, even small strikes can have a huge impact on human history.

Celestial Objects to Observe

Lunar Occultation Highlights for 2004

No matter where in the world you live, you can see the Moon hide stars and planets in its path. Here's when and where you can see dozens of lunar occultations this year.


A Daytime Occultation of Jupiter

Here's a blue-sky project if ever there was one. The thin waning crescent Moon will occult the second-brightest planet as seen from much of North America on Tuesday, November 9th.


Planetary Occultations for 2004

You've got plenty of chances to see an asteroid or planet pass in front of a star this year — and here's when and where to see them.

Celestial Objects to Observe

The Closest Whiz-by of Toutatis

An asteroid several kilometers wide will brighten to 9th magnitude and be visible in small telescopes when it passes Earth in late September.

Celestial Objects to Observe

Flora and Herculina meet Saturn

While checking out Saturn and Titan in the next few months, don't overlook two nearby minor planets: 8 Flora and 532 Herculina.

Paths of Vesta and Uranus in late 2004

Celestial Objects to Observe

Spot Vesta (and Uranus)

Two solar-system bodies just below naked-eye brightness can be found with binoculars in eastern Aquarius on October and November evenings: the minor planet 4 Vesta and Uranus.

Celestial Objects to Observe

The Variable Star T Cephei

The long-period variable star T Cephei peaks this October. The star is relatively easy to locate in binoculars because of its red hue.

Variable Stars

An 11th-Magnitude Supernova

An unusually bright supernova has gone off in NGC 2403, an 8.5-magnitude galaxy in the constellation Camelopardalis, the Giraffe.

Celestial Objects to Observe

Saturn Covers a Star

Late Friday night, November 14–15, Saturn and its ring system glide right in front of an 8.4-magnitude star in Gemini.

Celestial Objects to Observe

The Transit of Venus: Where to See It

For the first time since 1882, Venus will glide across the face of the Sun. Here's where you'll be able to watch this rare event on June 8, 2004.

Transit of Venus

Daylight Phenomena

Reanimating the 1882 Transit of Venus

Travel 130 years back in time to watch Venus transit the Sun in 1882, thanks to the discovery of 147 forgotten photographs taken by David Peck Todd from Mount Hamilton in California.

Celestial Objects to Observe

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.