Planets may begin forming much earlier than scientists once believed during the final stages of a star s birth, not afterward. This bold new model, backed by simulations from researchers at SwRI ...

Interestingly, the study also ties wide-orbit planets to the growing population of free-floating, or "rogue," planets—worlds ejected from their systems entirely.

Between May 20 and 24, the moon, Saturn and Venus will meet in a mini 'planetary parade,' becoming visible in the northern hemisphere this week. Here's how and when to watch the 3-planet alignment.

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about . Then the planets began to emerge, as the billions of particles of gas and dust left ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

According to new simulations, many, even most, planets get ejected from their star early in their history ...

The nearest single star to the sun, Barnard’s star, has a brood of planets all its own. The red dwarf star, about six light-years from Earth, hosts four close-in planets each about two to three ...

Using the now-retired Kepler space telescope, astronomers have discovered that larger planets grow up in more turbulent homes than smaller worlds.

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 light-years from Earth.

All 7 planets are aligning this February. Here's the best day and time to see Mercury, Venus, Mars, Jupiter, Saturn, Neptune and Uranus according to an astronomer.

You won't need to travel too far to catch the stunning "planet parade" in Friday evening's sky, as seven planets will be visible with the help of binoculars or a telescope.