Space

Cosmology

The universe’s continued existence implies extra dimensions are tiny

The strictest limits yet on the size of extra dimensions come from the fact that black holes haven't destroyed the universe.

Astronomy

‘Einstein’s Shadow’ explores what it takes to snap a black hole’s picture

The new book offers a behind-the-scenes look at the Event Horizon Telescope’s attempt to image a black hole.

Planetary Science

Saturn’s ‘ring rain’ is a surprising cocktail of chemicals

NASA’s Cassini probe got a closeup view of the material falling from Saturn’s rings into the planet. The data could help illuminate the belts’ origins.

Astronomy

Hubble may have spotted the first known exomoon

A single sighting with the Hubble Space Telescope seems to confirm that there’s a Neptune-sized moon orbiting exoplanet Kepler 1625b.

Astronomy

We may not have found aliens yet because we’ve barely begun looking

A new calculation says SETI searches have combed the equivalent of a hot tub out of Earth’s oceans looking for extraterrestrial intelligence in space.

Earth

Christopher Hamilton explores the architecture of other worlds

Planetary scientist Christopher Hamilton uses Earth’s volcanic structures are a blueprint for how lava shapes other worlds.

Astronomy

Paula Jofré makes stellar connections

Astrophysicist Paula Jofré is a galactic archaeologist, mapping out generations of stars.

Planetary Science

Readers contemplate water on Mars and more

Readers had questions about the significance of finding water on mars, air pollution from wildfires and spray-on sensors.

Astronomy

Astronomers may have spotted the birth of a neutron star

Scientists say they’ve witnessed a type of neutron star called a pulsar being born in the wake of a massive supernova for the first time.

Planetary Science

The first rovers to explore an asteroid just sent photos home

Japan’s Hayabusa2 spacecraft has deployed a pair of rovers to the surface of asteroid Ryugu.

Astronomy

Japan has launched a miniature space elevator

The Japanese space agency just launched a prototype space elevator to the International Space Station to test motion along a taut cable in space.

Astronomy

The TESS space telescope has spotted its first exoplanet

TESS’s first exoplanet is twice Earth’s size and may have lots of water.