Twin planets orbit distant star together

Astronomers have discovered two neighboring planets - one a bigger version of Earth - orbiting closer to each other than any planets discovered before.

Earth-sized planets may be plentiful

There could be many more small planets than previously thought, thanks to the discovery that they don't need to form around stars rich in heavy elements.

Earthlike planets unlikely in systems with hot Jupiters

Solar systems with so-called hot Jupiters don't seem to harbor Earth-sized planets, a discovery that will narrow the search for Earth-like worlds.

Claim: Advanced dinosaurs may rule other planets



It sounds like the plot to a science fiction story, but new scientific research hypothesizes that "advanced dinosaurs" may have evolved on other planets in the universe.

These rocky Milky Way planets are in habitable zones



Astronomers have long searched for habitable exoplanets orbiting red dwarf stars (M dwarfs), which are considered the most common type of star in the Milky Way galaxy.



Runaway planets hurtling through universe

Runaway planets could be hurtling through space at up to 30 million miles an hour, torn from their suns by a black hole.

Almost all Milky Way stars have planets

The vast majority of stars in our Milky Way galaxy have at least one planet orbiting them, astronomers have concluded - and lots of these could be comparatively Earth-like.

Distant planets show Earth's fiery future

NASA says its discovered two Earth-sized planets that have been swallowed up by their star - and survived.

Planets smashed to smithereens near supermassive black holes

The fat, doughnut-shaped clouds of dust that surround about half of supermassive black holes could be the remnants of planets and asteroids that have smashed into each other at incredible speeds.

Star's spiral arms point to possible planets

Astronomers have for the first time spotted a disk of gas and dust around a sun-like star that shows spiral-arm-like structures.

SpaceX wants to colonize planets

SpaceX CEO Elon Musk believes the human race should aspire to colonize the solar system, rather than just making do with inhabiting planet Earth.

Astronomer expects alien encounters “within twenty years”

Are we alone in the universe? Russian scientists don’t think so.

Sun and planets built of different materials

Our sun and its inner planets may not have formed from the same materials, as previously thought, samples returned by NASA’s Genesis mission indicate.

'Wrong way' planetary orbits explained

Scientists believe they've worked out why some extrasolar planets orbit in the opposite direction to their star's rotation.

Is there life on Earth-size planets?

Recently, NASA identified a world known as KOI 326.01. The planet is a tad smaller than Earth, with an average temperature lower than water’s boiling point. Still, in some ways KOI 326.01 is somewhat analogous to Earth, at least in size.

Kepler spots planets transiting their star

NASA's Kepler telescope has for the first time observed a planetary system with two planets passing in front of their star.

Hawking says colonization not an option

Stephen Hawking believes humans must colonize additional planets or face mass extinction.