"This is a whole sequence of planets that can give us insight into the evolution of planets... It's just a gold mine."

A new "biosignature" for our own planet may help astronomers find exoplanets that could support life—or other worlds that already do.

Scientists used data from the Kepler space telescope to better estimate the rate of Earth-like planets near stars similar to our sun.

Scientists plan to "tune into" the radio signals to hunt for exoplanets around white dwarf stars.

"Given what we and other surveys have seen so far, our solar system doesn't look like other solar systems..."

"The most valuable way to learn how planets form is to study planets, like CI Tau b, that are either still forming or have just formed."

New simulations suggest why super-Earths are often so close to their host star, where there doesn't seem to be enough solid material to form a planet, let alone a big one.

A shower of high-energy particles and nearby planets' gravitational pull may make planets in the "habitable zone" of the TRAPPIST-1 system anything but.

Researchers have discovered a new planet that's about the size of Saturn, but much hotter.

Our planet is 4.5 billion years old, but its inner core may be a lot younger.