Viewed from above, our solar system's planetary orbits around the sun resemble rings around a bulls-eye. Each planet, including Earth, keeps to a roughly circular path, always maintaining the same ...

Researchers based at Aarhus University measured the orbital eccentricity of 74 small extrasolar planets and found their orbits to be close to circular, similar to the planets in the solar system, but ...

Cometary orbits exhibit a wide range of shapes and eccentricities, not all being highly elliptical. Comets originating from the Oort Cloud possess highly eccentric elliptical orbits, subject to ...

Astronomers reveal some hot Jupiters formed via smooth disk migration. (Image: Graduate School of Arts and Sciences/College of Arts and Sciences/The University of Tokyo) Astronomers have uncovered new ...

Though wildly different in so many ways, Earth and Saturn's moon Titan have something important in common. Among all the objects in the solar system, they're the only two with liquids on their ...

New simulations examine whether the seven planets in the TRAPPIST-1 system could host moons, showing that only small, close-orbiting moons could remain stable over long periods ...

University of Southern Queensland provides funding as a member of The Conversation AU. Mississippi State University provides funding as a member of The Conversation US. All the planets in our solar ...