A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Keep your eye on the ball” is a motto for many athletes—and for astronomers trying to find Earth-threatening space rocks ...

Kepler was one of the most successful exoplanet-hunting missions so far. It discovered 2,600 confirmed exoplanets—almost half ...

But the stars that Kepler observed bloomed with planets so close to their star that their orbits lasted just days or weeks. Nor were these worlds all small like our inner planets. The most common ...

The star it orbits, Kepler 452, is slightly bigger than our own sun, but could sustain plant life which in turn makes the air breathable. “It is six billion years old. That is considerable ...

However, it was not until Kepler's observations that the planets followed elliptical orbits around the sun (rather than circular orbits) that astronomical models matched observations of the ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's responsible for the orbits of the planets and their satellites, but there ...

explains that this discovery has more to do with the observation of orbits of other planets. "In about 1604, Johannes Kepler fitted an ellipse model of Mars' orbit to observations of Mars ...

It’s possible Uranus and Neptune would also be dislodged from their orbits around the sun and sent ... gap in space between Mars and Jupiter. Kepler-62f (also known by its Kepler Object of ...

The planet 51 Pegasi b is a long way from Prior Lake, 48 light years (several billion miles) to be exact. It orbits a fifth magnitude star, similar to our Sun, in the constellation Pegasus. It was ...

Here are some pics of most earth-like exoplanets uploaded by NASA: Gliese 667Cc, 22 light-years from Earth, is 4.5 times Earth's mass, orbits its cooler red dwarf star in 28 days, and likely resides ...