How do black holes and neutron stars get closer before merging? Their orbits were until now assumed to be circular, with a ...

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 ...

Studying the orbits of thousands of exoplanets shows that large planets tend to have elliptical orbits, while smaller planets tend to have more circular orbits. This split coincides with several other ...

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy of Sciences hopes to address as a team of ...

A newly analyzed gravitational-wave event has revealed something unexpected about one of the Universe’s most violent ...

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 ...

If intelligent life is out there, it probably resides in a solar system with many planets. The more planets a star has, a recent study found, the more circular the orbits tend to be. Because planets ...

A team of researchersfrom MIT and Aarhus University, Denmark, have discovered thatEarth-sized exoplanets orbit their parent stars in the same way thatour planet orbits our own Sun – maintaining a ...

The planets of our solar system move in ellipses. We've known this, so we are told, ever since Johannes Kepler devised his laws of planetary motion in the early 1600s. While it's true that orbits are ...

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 ...

Strange giant planets known as hot Jupiters, which orbit close to their suns, got kicked onto their peculiar paths by nearby planets and stars, a new study finds. After analyzing the orbits of dozens ...