The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative ... in the earliest days of our cosmic neighborhood.

Spotting one or two of the planets in our solar system is well worth a good skywatch, but seeing (almost) all of them in a ...

All of our solar system’s planets are lining up to parade through the night sky ... Read more This mind-blowing map shows Earth’s position within the vast universe Never is this more apparent than ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Most of the information we have about planets beyond our solar system (exoplanets) comes from looking at dips in starlight as these planets pass in front of their host star. This technique can ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

The discovery of two new planets beyond our solar system by a team of astronomers ... ESA's Gaia satellite measuring minute variations in the positions of stars since 2014, with a view to ...

improving our understanding of planet formation and potentially shedding light on the origins of our own Solar System," says David Cont from the Ludwig Maximilian University of Munich, Germany ...