Alien in a car at Baker, San Bernardino County, California, USA

Our Space Brothers Might Not Actually Look Like Little Green Men after All

If we find aliens, chances are they'll be nothing like we ever imagined.
Astronaut Sidney M. Gutierrez, mission commander, pauses on the flight deck during Earth observations on the Space Shuttle Endeavour, 1994

Sidney M. Gutierrez: Shooting for the Stars

The first U.S.-born Latino astronaut to pilot a space mission blazed the long road to NASA with determination and optimism.
Francesca Vidotto

Francesca Vidotto: The Quantum Properties of Space-Time

Theoretical physicist Francesca Vidotto on feminist epistemology, white holes, string theory, and her book (with Carlo Rovelli) on loop quantum gravity.

How to See the Invisible Universe

Telescopes that detect long-wavelength signals offer clues about the Big Bang, the centers of black holes, and the origins of life.

What’s in a (Planet) Name?

Planet names must be 16 letters or less, preferably one word, non-offensive, and not too similar to an existing one.
A Mission STS-116 spacewalk

Is Space Too Crowded for NASA?

NASA's retirement of the space shuttle, along with the increase of commercial space firms, have ushered in a second space age. Is NASA still relevant?
An explosion on Earth

Understanding Planet-Wide Danger

The way Americans metabolized the global threat of nuclear war has had lasting effects on how we think about our newest global threat: climate change.
Buzz Aldrin and the U.S. Flag on the Moon

Should the Moon Landing Site Be a National Historic Landmark?

Some archaeologists argue it’s essential to preserve the history of lunar exploration. But would it represent a claim of U.S. sovereignty over the moon?
A constellation of satellites

Losing the Night Sky

Does an increase in satellites mean we soon won't be able to see the stars?
Suprematist Painting (with Black Trapezium and Red Square) by Kazimir Malevich

Dreaming of Spaceflight in 1920s Russia

Early in the 20th century, Cosmism was all the rage in Russia, inspiring a utopian and mystical view of interstellar travel.