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There may be 50 billion free-floating planets in our galaxy
There are at least 200 billion stars in our galaxy, and perhaps even a greater number of planets. Now a new study suggests there could be an additional 50 billion rogue planets, not orbiting any stars.
March 10, 2019
Eclipse shows moon move in reverse
Check out this interesting eclipse of the sun by Earth's moon on March 6. A NASA spacecraft saw it. During the eclipse, the moon appears to reverse its direction!
March 8, 2019
Clouds for some Earth-sized TRAPPIST-1 exoplanets
The red dwarf star TRAPPIST-1 - about 40 light-years away - has 7 Earth-sized exoplanets orbiting it. A new study puts limits on how many of those worlds have hazy or cloudy atmospheres.
March 7, 2019
How the moon got its sunburn
Every object, planet or person traveling through space has to contend with the sun's damaging radiation - and the moon has the scars to prove it.
March 7, 2019
Watch SpaceX Crew Dragon splashdown March 8
The SpaceX Crew Dragon spaceship will leave the International Space Station and splash down in the Atlantic Ocean on Friday, March 8, 2019. How to watch both events live.
March 7, 2019
Black hole found near Milky Way’s heart
It's not supermassive, but only an intermediate-mass black hole, near the center of the Milky Way. It might be one of over 100 million quiet black holes lurking unseen in our galaxy.
March 6, 2019
Asteroids are harder to destroy than we thought
What if we learned an asteroid was headed toward Earth? How much energy does it take to destroy an asteroid and break it into pieces? More than we thought, it turns out.
March 4, 2019
An ancient white dwarf star with rings
"This white dwarf is so old that whatever process is feeding material into its rings must operate on billion-year timescales," said one of the scientists involved in the discovery.
March 4, 2019
Planet 9 hypothesis gets a boost
A large, unknown Planet 9 in our solar system continues to elude astronomers. But a new review article in Physics Reports explains why some scientists still think they'll find it.
March 3, 2019
Hubble solves puzzle of Neptune mystery moon
Meet Hippocamp, the smallest known moon of the planet Neptune. Scientists have puzzled over its origin, and over why we see it orbiting where we do. Now, new Hubble data has shed light on these mysteries.
March 2, 2019
