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.

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

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

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

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

Astronomers discovered the gas giant planet — dubbed a "hot Jupiter " — in 2016, but have continued to investigate this ...

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

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

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...

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

Mercury takes only 88 Earth days to orbit the sun.

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