New earth-size planet discovered By George Petras, Traci Watson, Mitchell Thorson ... It’s probably a rocky world close in size to Earth and has 1.3 times the mass of Earth or larger.

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

A new, Earth-sized planet has been discovered only 90 light-years away from us. In astronomical terms, that’s right next door. What’s more, it might be capable of supporting life.

Astronomers have discovered an Earth-sized exoplanet orbiting a star with a lifespan 100 times greater than the Sun. Speculoos-3b is 55 light years away – more then 10 times further than the ...

The same team also discovered two new planets orbiting a second star. These planets are much larger, about twice the size of Earth, and they take six and 20 days to orbit their sun respectively.

The new planet is almost the same size as Earth and swings around its home star, which is called LP 791-18, about once every three Earth days. Average temperatures there could spike to more than ...

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

It's another meteoric rise for what's called the largest piece of Mars on Earth. The 54-pound rock fetched nearly $5.3 ...

Scientists have discovered a new planet that's 226 light-years away. It is roughly twice the size of Earth, which is rare for an exoplanet.

The largest piece of rock from Mars ever found on Earth, weighing 54 pounds, was sold for an extraordinary price at an auction of rare geological and archaeological objects on Wednesday in New York.

At 1400 light years away from Earth, scientist said Thursday they have discovered a planet they believe is the closest twin to our world ever found. WSJ's Monika Auger reports. Photo: NASA/JPL ...

New Earth-sized planet discovered next to star that will outlive the Sun. Scientists say Speculoos-3 b exoplanet orbits a star that will be one of the last to shine when the universe grows cold ...