Exoplanets

Astronomers obtain convincing evidence of a potentially habitable world around our nearest neighboring star—this could change everything

What are some of the most intriguing and unexpected puzzles about the universe?

Can we connect the microscopic and macroscopic factors involved in starting life on a planet?

A new analysis of outer solar system orbits suggests that there really could be a hitherto unseen giant planet orbiting far from the sun—but what are the implications?

Campaigns to name exoplanets seem like Shakespearean farce

Interstellar travel may present some unforseen problems in this short fiction

Astronomers use Kepler telescope to study weather on Jupiter-size planets beyond our solar system

Scientists are finding liquid water, the cornerstone for life as we know it, in surprising nooks and crannies of the solar system. Following Wednesday's news that there seem to be hydrothermal vents churning away in the warm, alkaline seas inside Saturn's moon Enceladus, researchers announced airtight evidence yesterday that Jupiter's moon Ganymede also has a [...]

Astrobiology has one key advantage when it comes to tooting its own horn – it can lay claim to a diverse range of scientific research as being relevant to the study of life in the universe.

In 1990, NASA's Voyager 1 spacecraft briefly looked back from its journey out of the solar system, capturing a view of the faraway Earth. Carl Sagan called it the "pale blue dot." From more than 6 billion kilometers away, beyond the orbit of Pluto, it seemed remarkable that our planet was even visible.

I spent some of last week at a fascinating and lively symposium on the origins of life and the search for life in the universe, held at the Earth-Life Science Institute (ELSI) at the Tokyo Institute of Technology.

From humanity’s first, flawed foray to the surface of a comet to the celebrated discovery of (and less celebrated skepticism about) primordial gravitational waves, 2014 has brought some historic successes and failures in space science and physics.