The two brightest asteroids are close to each other in late 2012 and early 2013. Moreover, they're traversing one of the most interesting areas in the night sky.
Ceres, the largest main-belt asteroid, is well placed for observation in June through August 2010.
Comet C/2007 W1 (Boattini) has reached 5th magnitude as of early June. It's now visible only from the Southern Hemisphere. When it reappears for northerners in July, will it be naked-eye?
A decently bright visitor from the solar system’s fringe has lingered in the evening sky for months. As it nears perihelion, Comet Garradd (C/2009 P1) will soon be seen better in northern morning skies before dawn.
As of January 4th the comet, ever-enlarging and thinning, is still in naked-eye view but only if you have a fairly dark-sky site. Use binoculars to follow its next moves.
Greet your trick-or-treaters with two Halloween treats: a bit of candy and a view of Comet Holmes.
An unexpectedly bright comet is crossing a well-known part of the sky.
The odds were stacked against it, but a comet discovered just two weeks ago has passed just 116,000 miles from the Sun's surface and — like a celestial phoenix — reemerged into view. Here's the latest on what veteran observer John Bortle calls "one of the most extraordinary events in cometary history."
Is the Moon’s orbit inclined sufficiently that, when it misses the Sun by the greatest amount north (or south), the lunar crescent could be seen in a telescope at new Moon? Probably not. The inclination of the Moon’s orbit to the ecliptic varies from 5.0° to 5.3°. French astronomer André Danjon (1890–1967) showed that...
Lucky skywatchers in Europe, northern Africa, and western Asia will get to see a deep partial eclipse of the Sun on Tuesday.
One of the giant planet's signature bands, the South Equatorial Belt, began fading late last year. Now, for the first time since 1992, it's completely missing. Amateur and professional observers worldwide are eagerly hoping to witness its return.
Dust storms have curtailed all rover activity for nearly a month.
Although many of us are already seeing seasonal changes, autumn for the Northern Hemisphere officially begins on Sunday, September 22nd, at 20:44 Universal Time. But why is the time of the equinox so specific? S&T's editors explain.
Observers are reporting an unusual event on the Red Planet, well placed for western U.S. residents this evening.
Discovering a comet remains one of amateur astronomy's greatest accomplishments, and five individuals are being honored for doing just that.
The Moon is the great highlight of the early morning sky this week, as it heads for a spectacular rendezvous with Venus at dawn on Thursday, January 10th.
Don't miss the evolving sunspots now crossing the solar disk.
A summer night in the Boston exurbs proves surprisingly rewarding.
You can gawk, study, sketch, image, or just howl. No matter how you do it, head outside on September 18th to celebrate International Observe the Moon Night.
If you have a solar filter or another way to safely view the Sun, be sure to check out the latest group of sunspots marching across its disk.
On July 12th, Neptune completed one full circuit around the Sun since its discovery on the night of Sept 23-24, 1846.
Comet Boattini, now faintly visible to the unaided eye from sites without light pollution, is climbing rapidly higher in the Northern Hemisphere's dawn sky.
This pearly glow is surprisingly easy to see if you know what to look for.
Did you know that Venus is still visible in the morning sky in April 2008?
An 800-foot-wide chunk of rock will pass less than a half million miles from Earth on the night of January 28th.