When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

HWO will be the first space telescope built to find potentially habitable planets and analyze their atmospheres for signs of ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Nearly one third of known exoplanets are enormous gas giants, similar to Jupiter or Saturn. But whereas our solar system ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Certain extreme planets are called ultra-short period objects if they're very close to their stars and orbit them in mere hours, like K2-22b.

A team of astronomers have discovered a rather curious exoplanetary system that has two gas giant planets that are messing up each other’s orbit! On of them is 3.8 times the mass of Jupiter and ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

Samples of Bennu were brought back to Earth by NASA’s OSIRIS-REx spacecraft in 2023. Now, a pair of newly published papers ...

Less than 24 hours after the Minor Planet Center announced a new asteroid, it said the object was actually Musk's electric ...

Finding a world like Earth elsewhere in the universe might mean looking for the right kind of solar system. A new discovery ...

The study of exoplanets has come a long way since the first detection of a planet orbiting a star other than the Sun in 1995.