Across the Milky Way and beyond, planetary systems appear to fall into a few recurring blueprints, and recent exoplanet ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is extremely ...

IMAGE: An artist’s impression of a free-floating planet. Using observations and archival data from several of NSF’s NOIRLab’s observatories, together with observations from telescopes around the world ...

Astronomers have just confirmed one of the strangest kinds of worlds imaginable, a planet drifting through the galaxy with no star of its own roughly 10,000 light-years from Earth. Instead of circling ...

Ground and space-based telescopes have confirmed a microlensing event caused by a rogue planet wandering silently through the ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers have discovered two new exoplanets that are similar to other worlds found in the ...

LOS ANGELES - The Milky Way is home to at least 17 billion planets that are similar in size to Earth, a new estimate suggests. That's more than two Earth-size planets for every person on the globe.

Most planets are part of a star system of their own – but some go their own way, and they have remained largely mysterious ...

Preface -- Earth Is but a Speck -- Celestial Neighborhood. Bedazzled by a Comet -- To Be...or Not to Be a Planet -- The Watery Allure of Mars -- Rings, Rings, Rings -- The Baffling White Dwarf Star -- ...