By tracing the corkscrew wobble of two stars as they move through the sky, the Gaia space mission has discovered one new ...

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

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

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

Then use the table above and the equation: Weight = mass x gravity to investigate how your mass and weight would vary from planet to planet. Here is a typical set of results for a student whose ...