2161–2180 of 2,250 results

Celestial News & Events

Mars at Its All-Time Finest

Never before in human history has such a golden opportunity to observe the red planet presented itself, so make the most of it with our Mars observing guide for 2003.

Celestial News & Events

Celestial Highlights for 2005

Eclipses, conjunctions, and occultations will keep observers worldwide busy during the upcoming year. Here's a summary of what's in store.

Observing

The Comet After Deep Impact

Follow Comet Tempel 1 with your telescope using our charts — and read what others have been seeing.

Celestial Objects to Observe

Lunar Occultation Highlights for 2005

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

Occultations

The Moon Occults Fiery Antares

Set your alarm clock to watch the last-quarter Moon cross a first-magnitude star on the morning of March 3rd.

Night Sky Sights

The Martian Moons in 2007–08

If you've never spied Mars's two satellites, Phobos and Deimos, the end of 2007 is your best chance for a long time. You'll need a big telescope — and you'll need to know exactly where to look.

Night Sky Sights

Uranus and Neptune in 2005

From now to year's end, our finder charts will help you locate Uranus (in Aquarius), Neptune (in Capricornus), and Pluto (in Ophiuchus).

Observing

Three Planets Bunch Up in Twilight

Venus, Mercury, and Saturn are performing a slow dance low in the western sky at dusk.

Observing

Catch Comet LINEAR Splitting in Two

A faint comet has suddenly brightened to 8th or 9th magnitude while shedding a chunk of its nucleus. It's visible with a telescope in early evening till about June 22nd, 2005.

Celestial Objects to Observe

Asteroid Occultations: March–July 2005

Mobile observers with video cameras, capable of filling gaps between those at fixed sites, are especially needed to observe asteroid occultations.

Asteroid 2 Pallas

Asteroids

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.

Thin Moon and Venus

Observing

Young-Moon Hunting in 2005

Set your own personal record for sighting the thinnest crescent Moon at dusk. Here's when and where you'll find these lunar slivers in 2005.

Observing

Big Sunspot in View

After weeks of low activity, the Sun is displaying a huge spot that you can see with nothing but a safe solar filter.

Variable Stars

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

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.