Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

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

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

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

If planets had social media accounts, the solar system would showcase a frenzy of unique personalities. Mercury tweets at ...

The planetary parade in February 2025 will see five bright planets in clear view and a special alignment of Mercury and Saturn ...

The James Webb Space Telescope has captured a belching protostar in its infancy. By studying the dust grains whirling around ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

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