Astronomy
The James Webb Space Telescope Has Launched: Now Comes the Hard Part
After years of delay, the most ambitious observatory ever built has at last left Earth. It now faces a high-stakes series of deployments in deep space
Features
Dark Matter
Dark Matter May Be Missing from This Newfound Galaxy, Astronomers Say
A growing number of galaxies seem to be bereft of the mysterious substance, posing fresh challenges for some of cosmology’s most cherished theories
Planetary Science
NASA's DART Mission Could Help Cancel an Asteroid Apocalypse
Our planet is vulnerable to thousands of “city-killer” space rocks. If—when—one is found on a collision course with Earth, will we be ready to deflect it?
Departments
- From the Editor
Cosmic-Level Anxiety
- News
NASA Spacecraft 'Touches' the Sun for the First Time Ever
In a First, Physicists Glimpse a Quantum Ghost
Scientists Plan Private Mission to Hunt for Earths around Alpha Centauri
Life Is Complicated--Literally, Astrobiologists Say
Heavy Metal Exoplanet Found Orbiting Nearby Star
- Opinion
When Did Life Start in the Universe?
