For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

The two exoplanets, or planets outside of our solar system, orbit a star called TOI-1453, which is slightly cooler and ...

Asteroids are made of metals and rocky material. There are many asteroids in our solar system which orbit the Sun in oval or egg-shaped elliptical orbits which can take millions of years to complete.

Earth has a nearly circular orbit, but some planets outside our solar system, called exoplanets, have very elliptical orbits. UCLA astrophysicists have now measured the shape of the orbits of ...

In the solar system, these planets are closer to the ... comparatively large moon, and its elliptical orbit around the Sun.

So exactly how many solar system moons have we found ... "The simplest definition [of a moon] would be an object that is in an orbit around a larger, non-stellar object," Ashton told Live Science.

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...