Astronomy
Astronomers Get Their Wish, and a Cosmic Crisis Gets Worse
We don’t know why the universe appears to be expanding faster than it should. New ultra-precise distance measurements have only intensified the problem.
We Never Know Exactly Where We’re Going in Outer Space
Adventures in space travel remind us how imprecisely we measure reality.
Move Over, Mars: The Search for Life on Saturn’s Largest Moon
Alien microbes could be flourishing in the underground seas of Titan and the solar system’s other ocean worlds.
Take Our Virtual Trip to Mars
See where NASA’s Mars 2020 mission will go and what it may find.
These Images Expose the Dark Side of the Solar System
Explore the hidden drama of planets, comets, and space geysers.
The Universe Has Made Almost All the Stars It Will Ever Make
Black holes are cosmic dimmers.
The Black Sheep of Black Holes
This potential member of the cosmic zoo may explain a lot about how the cosmos is structured.
The Mystery of the Dark Asteroid That Scorched Russia
A new theory emerges to explain the enigmatic Tunguska Event.
The Trouble with Counting Alien Civilizations
Life on Earth is a sketchy guide to intelligent life in the cosmos.
