Astronomy
There are more galaxies in the Universe than even Carl Sagan ever imagined
There are between 6 and 20 trillion galaxies out there. Carl Sagan's "billions and billions" was far too low of a guess.
Three crucial experiments aboard NASA’s moon rocket
These Artemis 1 experiments could protect NASA astronauts and help usher in a future in which space is accessible to everyone.
Future sailplanes could explore Mars like birds
Sailplanes could harvest wind energy from Mars’ atmosphere, probing unexplored regions for long stretches of time.
The Universe is flat. Here’s what that teaches us.
When we measure it, we find that our Universe really is flat. Here's what we can learn from that, and why it matters so much.
Newly discovered exoplanet may be first covered in liquid water
The first ocean planet may have just been discovered in the “Goldilocks zone” of a star 100 light-years from Earth.
A new nova disappeared faster than ever, and an even bigger cosmic catastrophe is coming
Today, the fastest-ever nova to fall off has been discovered, and even faster ones may be out there. What comes next?
Listen to the sound of a black hole, remixed by NASA
NASA scientists have “remixed” the incredibly deep sounds emitted by a black hole 240 million light-years away.
NASA thinks it may snow upside down on Europa
A study of “underwater snow” on Earth is informing NASA’s hunt for habitable locations on Jupiter’s icy moon Europa.
Earth’s orbit is about to get way more crowded
Satellite mega constellations could bring the world online, but they're also a threat to astronomy. Can we study space and build in it, too?
7 spectacular lessons from James Webb’s first deep-field image
With its first deep-field image, the James Webb Space Telescope has truly ushered in an entirely new era in astronomy and astrophysics.