Mars and Saturn appear at nightfall. From southerly latitudes, you can also view Mercury near the sunset horizon. The morning planets are Jupiter and Venus.
Pioneer 11 was the first spacecraft ever to encounter Saturn. It paved the way for the even-more-sophisticated Voyager spacecraft.
The zodiacal light is an eerie light extending up from the horizon. No matter where you are on Earth, springtime or autumn is the best time to see it.
National Radio Astronomy Observatory astronomers used a tried-and-true method – stellar parallax – to resolve a controversy over the Pleiades’ distance.
Will Mars and the moon will appear the same size on August 27, 2014? Gosh, no. What’s really amazing is the staying power of this 11-year-old hoax.
A NASA sounding rocket has confirmed that the solar system is inside an ancient supernova remnant. Life on Earth survived despite the nearby blasts.
Using telescopes on the ground and in space, astronomers have obtained the best-yet view of a galaxy collision that happened when the universe was half its current age.
Scientists test a device on an Alaska glacier that could be used to explore an icy moon of Jupiter.
NASA says this is New Horizons’ last major crossing en route to becoming the first probe to make a close encounter with distant Pluto on July 14, 2015.
Five finalists named as potential landing sites this November for Philae lander in ESA’s fabulous Rosetta comet mission. Comet 67P/Churyumov–Gerasimenko, here we come.
On the anniversary of Voyager 2′s encounter with Neptune and Triton … an awesome collection of restored Voyager 2 images, plus the link between Triton and Pluto.
The moon will return to the evening sky this week, waxing toward full. Next full moon – night of September 8-9, 2014 – is the Harvest Moon.
The longest lunar month of 2014 starts with the August 25 new moon and ends September 24. All you need to know about the varying lengths of the lunar months, here.
The first view of Earth from the moon was a stunner when NASA released it in 1966. Later, NASA restored the photo to reveal even more detail.
Next time you’re brushing you teeth, think on this: New research suggests that the fluorine in your toothpaste originates from the sun’s dead ancestors.
New map from a 1989 spacecraft flyby gives us a glimpse of an unseen world.
A few days before the NASA spacecraft Voyager 2 skimmed by Neptune in 1989, it acquired images of a faint, continuous ring system encircling the planet.
New image of star-forming regions in southern Milky Way. Star cluster NGC 3603 is 20,000 light-years away. Glowing gas clouds NGC 3576 is about half as far.
Mission planners didn’t anticipate that Curiosity would be driving over an area on Mars that has sharp, pyramid-shaped rocks embedded in hard ground.
A black hole candidate known as M82 X-1 appears to have a mass of about 400 suns, making it one of only half a dozen suspected midsize black holes.