Our corner of the galaxy teems with alien worlds. In the 25 years since the discovery of the first planets…
Antiproton count hints at dark matter annihilation
Whiffs of dark matter may be blowing in on a cosmic ray breeze. Antiprotons streaming down on Earth from space…
Readers puzzled by proton’s properties
Proton puzzler Uncertainty over the proton’s size, spin and life span could have physicists rethinking standard notions about matter and…
See the latest stunning views of Jupiter
Once every 53 days, Jupiter pulls Juno close. Locked in orbit since July 2016, the spacecraft has made five close…
Satellite trio will hunt gravitational waves from space
The hunt for gravitational waves is moving upward. A space-based detector called the Laser Interferometer Space Antenna, or LISA, was…
Kepler shows small exoplanets are either super-Earths or mini-Neptunes
Small worlds come in two flavors. The complete dataset from the original mission of the planet-hunting Kepler space telescope reveals…
The moon might have had a heavy metal atmosphere with supersonic winds
The infant moon may have had a thick metal atmosphere, where supersonic winds raised waves in its magma ocean. That’s…
New data fuel debate on universe’s expansion rate
A new estimate of how fast the universe is expanding supports one side of an ongoing debate, favoring a more…
Milky Way’s loner status is upheld
If the Milky Way exists in the biggest cosmic void ever observed, that could solve a puzzling mismatch between ways…
Eclipse watchers catch part of the sun’s surface fleeing to space
View the video For the first time, researchers have watched relatively cool parcels of plasma speed away from the surface…