New simulations suggest that up to four of the solar system's rocky planets, including Earth and a long-lost world, once ...

A study has suggested that this motion of our star through the galaxy potentially takes us through regions of space that could affect our planet's climate. According to the study, the Solar System may ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Astronomers propose a giant, hidden planet beyond Neptune to explain odd orbits of distant Kuiper Belt objects.

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

Scientists want to send a spacecraft to intercept the interstellar object 3I/ATLAS before it vanishes for good.

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

The planetary meet up between the two brightest planets in our solar system is known as the conjunction and takes place over ...

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth, with an equatorial diameter of 88,846 miles (about 142,984 kilometres).

Osiris, a gas giant about 150 light-years from Earth, orbits a yellow star similar to our sun. It is the only planet outside our solar system known to have an atmosphere.