The star system V883 Orionis contains a rare star surrounded by a disk of gas, ice and dust.
A. Angelich (NRAO/AUI/NSF)/ALMA (ESO/NAOJ/NRAO)
Astronomers have long known where water is first formed in the universe and how it ends up on planets, asteroids and comets. A recent discovery has finally answered what happens in between.
Israel Pina / Unsplash
Some physicists think we live in a multiverse, surrounded by universes not quite like our own. What does that mean for life?
Artist illustration of an exoplanet.
dottedhippo/iStock via Getty Images
Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?
Once people get there, Mars will be contaminated with Earth life.
NASA/Pat Rawlings, SAIC
NASA’s InSight Mars lander touches down Nov. 26, part of a careful robotic approach to exploring the red planet. But human exploration of Mars will inevitably introduce Earth life. Are you OK with that?
Nearly 50 years since the first man walked on the moon, our morals are still stranded on Earth.
Imagined view from Kepler-10b, a planet that orbits one of the 150,000 stars that the Kepler spacecraft is monitoring.
NASA/Kepler Mission/Dana Berry
When NASA first started planning the Kepler mission, no one knew if the universe held any planets outside our solar system. Thousands of exoplanets later, the search enters a new phase as Kepler retires.
Aliens are highly likely to undergo natural selection, shows new research.
The Viking landers in the 1970s were the last to look directly for life on Mars.
Planetary protection protocols try to make sure we don’t seed places like Mars with life from our planet. An astrobiologist argues they’re misguided – especially with human astronauts on the horizon.
Artist’s impression of Proxima Centauri b.
You may even be able to find other planets around the star closest to our solar system.
The planet is more similar to Earth than any other – except when it comes to supporting life.