Moon Had Ancient Atmosphere, Study Suggests
Volcanic eruptions could have created a temporary lunar atmosphere billions of years ago
Stories by Hanneke Weitering
Arecibo Observatory Closed by Hurricane Maria
The condition of the world’s second-largest radio telescope remains unclear after being battered by the storm
Still a Glaring Problem: How a Solar Eclipse Can Fry Your Eyes
From chemical changes to thermal burns, a rundown on exactly what staring at the sun can do
Big, Shiny Asteroid to Buzz Past Earth on April 19
Approach of the 2,000-foot space rock is closest for such a large object since 2004
50th Anniversary of Apollo 1 Fire: What NASA Learned from the Tragic Accident
January 27 marks the 50th anniversary of the first major, deadly disaster for the U.S. space program
John Glenn, First American in Orbit, Falls Ill in Ohio
The 95-year-old former astronaut and senator has been in hospital for more than a week
Weird Extragalactic X-Ray Flares Baffle Astronomers
A new class of stellar objects could be causing ultrabright repeating outbursts from old, quiescent galaxies
Barack Obama Declares U.S. on Track to Mars
In a new op-ed, the President of the United States reiterated his plan to send humans to Mars sometime in the 2030s.
A Bus-Size Asteroid Just Gave Earth a Close Shave
Scientists spotted the space rock two days before its flyby
NASA's Juno Transmits First Close Look at Jupiter
The spacecraft's closest-ever swoop over Jupiter's clouds offers a new view of the giant planet's north pole
This Weird Galaxy Is 99.99 Percent Dark Matter
Astronomers say ultradiffuse or “fluffy” Dragonfly 44 shouldn’t be able to hold itself together with so few stars
Hibernating-Star Explosion Provides First Evidence of Nova Cycle
Evidence of additional mini outbursts leading up to the so-called classical nova provides the first direct evidence for the nova hibernation hypothesis, which suggests a cyclical evolution of such stars
