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Orbit of Comet 209P/LINEAR

Celestial News & Events

Meteor Storm Brewing for 2014?

Dynamicists know for certain that on May 24, 2014, Earth will plow through a dense stream of dust particles shed by the periodic comet 209P/LINEAR. The only question is: how intense will the assault be?

Pro-Am Collaboration

A Star Count for Everyone

Take part in this year's Great World Wide Star Count, and you'll be joining thousands of other "citizen scientists" in raising dark-sky awareness around the globe.

Comet Hergenrother flares up

Celestial News & Events

Comet Hergenrother Puts on a Show

Astronomers predicted that Comet 168P/Hergenrother wouldn't get any brighter than 15th magnitude this month. But the comet had other ideas: an ongoing outburst has brightened it to within reach of medium-size backyard telescopes.

Celestial News & Events

A "Dream Comet" Heading Our Way?

Veteran skywatchers are trying to contain their enthusiasm for Comet ISON, which, late in 2013, could become the brightest comet in decades.

Celestial News & Events

Big Breakout on Jupiter

One of the big planet's iconic dark belts has been roiling with activity, rewarding observers with the most dramatic eruptions there since 1926.

Impact flash on Jupiter

Celestial News & Events

Bright Fireball Spotted Near Jupiter

Amateur astronomers have spotted a brief flare of light on Jupiter, the third such explosion in as many years. The impactor was too small to penetrate deeply enough into the Jovian upper atmosphere, and no impact "scar" has been seen.

Celestial News & Events

Americans Will See Total Solar Eclipse in 2017

Mark your calendars for August 21, 2017 — when the Moon's umbral shadow will race coast to coast across the United States for the first time in nearly a century.

Celestial News & Events

August 13th's Occultation of Venus

If you're up for a bit of a challenge, drag out your telescope to watch a thin crescent Moon glide over brilliant Venus. This cover-up is a daylight event in the U.S., but it occurs in dark skies before dawn on the 14th for lucky observers in Japan.

Celestial News & Events

Perseids at Their Prime

The annual Perseid meteor shower peaks this weekend, providing skywatchers with a great opportunity to see some incoming bits of the cosmos.

Celestial News & Events

Mars in the Evening Spotlight

This week countless space buffs will be riveted by Curiosity's arrival at Mars — which can be found, along with Saturn and Spica, in the west after dusk.

Celestial News & Events

Jupiter's Disappearing Act

Skywatchers across the Eastern Hemisphere looked on as the King of Planets briefly ducked behind the Moon on July 15th.

Celestial News & Events

July 15th's Occultation of Jupiter

Lucky skywatchers in Europe and northern Asia can watch a waning crescent Moon slide over Jupiter and its Galilean satellites in the hours before and after Sunday morning's dawn.

Celestial News & Events

Yet Another Nova in Sagittarius

For the fourth time this year, a star has erupted into prominence in the same constellation. This one is relatively bright and easy to spot from your backyard.

Celestial News & Events

Predawn Treats for Early Risers

If you can get yourself out of bed early, spectacular predawn vistas await your eyes, binoculars, and telescope over the next week.

Celestial News & Events

Possible Nova in Sagittarius

If you've got a clear, dark view toward the southern horizon, try your hand at spotting a flaring star that has brightened to near 9th magnitude in northwest Sagittarius.

Celestial News & Events

2012 Venus Transit: S&T Reports

Clouds, veering cabbies, and old optics didn’t deter committed spectators of this last-chance astronomical event.

Venus's changing phases

Celestial News & Events

Venus Takes the Plunge

The brightest planet has dominated the evening sky for months. But during May it sinks rapidly toward the setting Sun — and its historic transit across the solar disk in early June.

Celestial News & Events

Nova (Nova Sagittarii 2012) Erupts in Sagittarius

Observers have reported a "new star," now visible in the predawn sky, that can be seen in small telescopes or good binoculars.

Comet Pan-STARRS in March 2013

Celestial News & Events

Comet Pan-STARRS: Still on Track

The inbound comet C/2011 L4, discovered last year, has been brightening steadily the past few months. It could still fizzle — or it could become a pretty bauble in post-sunset skies next March.

Celestial News & Events

Venus Passes the Pleiades

Venus is passing through the Pleiades in a breathtaking spectacle that reaches its peak on April 3rd. This unique pairing is part of a series of Venus events in 2012, culminating in the June transit of the Sun.