While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

In 2015, NASA’s Kepler Space Telescope identified one of the most Earth like planets ever discovered, Kepler 452b. It orbits ...

ESA's Gaia mission has determined he orbits of 154,741 asteroids in our solar system. Credit: ESA/Gaia/DPAC ...

The orbits of the planets around the sun have been the source for many a scientific debate. Their current orbital properties are well understood but the planetary orbits have evolved and changed since ...

For the inner four planets in this solar system, each planet orbits the sun three times for every two orbits of the planet immediately to its outside. For the fourth, fifth and sixth planets, they ...

CAPE CANAVERAL, Fla. — Astronomers have discovered a rare solar system in the Milky Way that boasts six planets orbiting in perfect rhythm like a cosmic orchestra, untouched by outside forces since ...

Credit: NASA/JPL-Caltech Planets orbit their parent stars while separated by enormous distances—in our solar system, planets are like grains of sand in a region the size of a football field. The time ...

When planetary scientists look to other stars for planets beyond Earth, they don’t often turn up much that resembles our solar system. Whether it’s because of star size, detection method, or observing ...

The hunt for Planet Nine continues as new discoveries make the Solar System’s biggest mystery even harder to solve. Is there ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...