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.
In this episode of Life's Little Mysteries, we'll take a closer look at black holes, the mysterious cosmic objects that have a gravitational pull so strong that not even light can escape.
A key signal for a certain kind of dark matter failed to turn up in a search throughout the Milky Way. Now scientists are disagreeing about what that means.
A new image from NASA's Hubble Space Telescope revisits the iconic "Pillars of Creation" in infrared light.
Fifty years ago today (April 11), three astronauts launched to space, poised to be the next humans to walk on the moon. But things didn't exactly go according to plan.
A spacecraft bound for Mercury beamed home stunning views of Earth during a crucial flyby conducted early today (April 10).
An exoplanet may be shaped like an American football due to the mighty gravitational forces it experiences close to its star, a new study finds.
An anonymous patron purchased a real-life rocket for $5.6 million during an online, livestreamed auction on April Fools Day.
A scarlet fan spread across the skies over Japan 1,400 years ago, and it's been puzzling astronomers ever since.
In this episode of Life's Little Mysteries, we'll take a closer look a scientific mystery that's a favorite topic here at Live Science: aliens.