The icy core of Comet C/2013 A1 Siding Spring won’t strike Mars, but dust from the comet might damage our spacecraft.
New Horizons – en route to Pluto – is currently out of hibernation for a series of engineering and navigation checks, which will continue until the end of August 2014.
Earth has just entered the stream of debris left behind by Comet Swift-Tuttle, the parent comet of the Perseids. Now is the time to start watching for meteors.
Don’t wait until August 11, 12 and 13 to watch the Perseids in 2014. The moon will be in the way. Start watching for meteors now!
The latest images. Next month, the Rosetta spacecraft will be only 100 kilometers (60 miles) from the comet and will begin traveling alongside it through space.
Maybe some extra-terrestrials pollute their planets too.
The sky’s two brightest nighttime objects, in the east before dawn this morning.
Shot in Joshua Tree National Park in California. Relax … and enjoy the night sky.
In the N. Hemisphere, the annual August Perseid meteor shower ranks as the year’s favorite shower. A big, bright supermoon interferes in 2014. So start observing the Perseids soon!
The Andromeda galaxy is approaching our Milky Way galaxy across the vastness of space. When will they collide?
Remember the Camelopardalids, the meteor shower earlier this year astronomers said would be spectacular … except it wasn’t? Now, the same astronomers explain why.
Mars has two moons, Jupiter has 67, Saturn 62, Uranus 27, Neptune 14. But our planet Earth has just one moon. Doesn’t it?
The longest lunar month of 2014 will start August 25 and end September 24. All you need to know about the varying lengths of the lunar months, here.
Most distant planets known so far orbit close to their stars and thus have a short “year.” Kepler-421b has a year about twice as long as Earth’s.
Twilight is the time of day between daylight and darkness. Astronomers, the experts on nighttime, recognize three kinds of twilight.
The year 2014 has a total of five supermoons. They are the two new moons of January, and the full moons of July, August and September. Next supermoon: August 10.
Today is the 45th anniversary of humanity’s historic first steps on the moon. “One small step for [a] man, one giant leap for mankind.” The story in pictures.
On July 19, 2013, the Cassini spacecraft acquired a distant image of our home world, as we Earth citizens cast our thoughts spaceward.
The multiverse hypothesis – the idea that there are other universes – can be tested, scientists say.
The car-sized rover is currently crossing a stretch of hard, rocky ground like that which previously dented and punctured its aluminum wheels.