Right now, key measurements of the universe's expansion are contradicting each other. A lost form of dark matter could help them agree.
After a close encounter with the moon on Sunday (April 26), Venus will be at its greatest brightness of the year on Tuesday (April 28).
The Arecibo Observatory in Puerto Rico captured a radar image of 1998 OR2, which will zoom within 3.9 million miles (6.3 million kilometers) of our planet on April 29.
SpaceX's Starlink internet satellites will soon sport an accessory to tamp down their surprising brightness.
To honor the Hubble Space Telescope's 30th anniversary in space, NASA shared this epic 'Cosmic Reef' image of a nearby stellar nursery.
A Russian space official has tested positive for COVID-19, the disease caused by the novel coronavirus.
SpaceX will launch 60 new Starlink internet satellites into orbit on a used rocket today (April 22) and you can watch it all live online.
The alleged exoplanet Fomalhaut b was discovered in 2004 and disappeared in 2014. Astronomers now say it was never a planet to begin with.
A glimpse into China's readiness to handle samples from the moon reveals steps to be taken for storage, processing and preparation of the specimens.
Russia just fired an anti-satellite missile in a test of technology that the U.S. Space Force considers a threat to American orbital assets.
Astronomers tracked the orbit of a star around the Milky Way's supermassive black hole, and found its path exactly matched Einstein's theory of general relativity.
There's an asymmetry between the universe's matter and antimatter. This experiment might explain why.
This proposed mesh telescope would let us gaze out into the dark cosmos, unhindered by our planet's atmosphere and radio interferences.
A mammoth star explosion known as SN2016aps, which occurred in a galaxy about 3.6 billion light-years from Earth, is the brightest supernova ever seen, a new study reports.
The mysterious interstellar object 'Oumuamua is probably a fragment of a larger body that was torn apart by gravitational forces during a close flyby of its native star, a new study suggests.