The Red Planet briefly disappeared behind the moon for skywatchers in North America on Tuesday (Feb. 18), providing a rare celestial treat for early risers and astrophotographers.
Pluto's discovery wouldn't have been possible, astronomers have realized, without the calculations of a mathematician whom history has forgotten.
As the waning crescent moon rises in the small hours of the morning of Tuesday, Feb. 18, skywatchers will be preparing for an unusual event.
A night-sky photo features a lonely stargazer admiring the beautiful constellation of Orion, the hunter — and it's strangely dimming star Betelgeuse.
The more astronomers consider the advent of satellite megaconstellations, the more anxious they get.
This deep-space image shows the Heart and Soul nebulas shining brightly in reddish hues from energized hydrogen.
The Dipper is more than just a bright and familiar star pattern. It's a compass, a clock, a calendar and a ruler all rolled into one!
One of the brightest stars you'll see in the sky these days is Betelgeuse, whose red tones provide a fun skywatching target in February.
It's some next-level skywatching: Scientists are using images captured by NASA's InSight lander to look for meteors on Mars.
Where should you go to get the best look at the dancing, dazzling display known as the aurora borealis?
The full moon of February, called the Snow Moon, occurs Sunday, Feb. 9, at 2:33 a.m. EST (0733 GMT).
Looking at the night sky can be an inspiring moment for kids, and the right telescope can drive an interest in astronomy for a lifetime.
Mercury is often cited as the most difficult of the naked-eye planets to see due its proximity to the sun, but there are times during the year when Mercury can be surprisingly easy to spot.
The potential (but unlikely) collision of two old satellites will be visible in the eastern U.S. today (Jan. 29) at at 6:39 p.m. EST. Here's how to see it.
Tonight (Jan. 28), you can catch the crescent moon make a close approach to Venus in the evening sky.
Christened for months as "The Comet of the Century," Comet Kohoutek never came remotely close to living up to expectations.
The waning crescent moon will form a triangle with the Red Planet and the bright star Antares in the morning sky on Monday (Jan. 20), and you can catch the trio in the morning sky before dawn.
Lunar eclipses occur when Earth's shadow blocks the sun. There are three types; the most dramatic is a total lunar eclipse. Find out when is the next one.
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