Over millions of years, these objects grew larger, sweeping up material in their orbits and becoming the planets we know today. This model of solar system formation is known as the nebular hypothesis.

All must, then, be regarded as having always been members of the solar system, however much their orbits may have changed ... of the viscosity with the time. Scientific Papers, vol.

Kepler’s laws describe common features of the motions of orbiting objects, including their elliptical paths around the sun. Orbits may change due to the gravitational effects from, or collisions with, ...

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.

This article was produced for Kavli Prize by Scientific ... their orbits are not in a random jumble. Instead, they’re all aligned—with orbits that are tilted compared to the solar system ...

However, it was not until Kepler's observations that the planets followed elliptical orbits around the sun (rather than circular orbits) that astronomical models matched observations of the ...

At a frigid -125 degrees Fahrenheit (-87 degrees Celsius), WD 1856+534 b is the coldest planet ever directly observed, ...

"Usually when we build our numerical models ... in orbits that take longer than 200 years to circle the Sun. "Long-period comets spend most of their lives so far away from the solar system ...

"This result suggests that in Jupiter-like orbits, most planetary systems may not mirror our solar system," said co-author Youn Kil Jung of the Korea Astronomy and Space Science Institute ...

Astronomers believe that our solar ... systems, according to CNN. The search began in 2014 when astronomers Scott Sheppard and Chadwick Trujillo noticed unusual patterns in the orbits of several ...