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

Learn about the new perspective on Earth's reduction of moderately volatile elements, a discovery made possible by meteorites ...

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

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

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

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

Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy material, the ingredients of planets," according to NASA's Goddard Space ...

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

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

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.

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests. The ...