Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard’s Star, the second-nearest star system to Earth.

Its gravity is just fractionally stronger than ... masses which give the feel of what 1kg would feel like on different planets. This could then lead on to worked examples of the formula used ...

Since it is a force, weight is measured in Newtons (not kilograms). The force of gravity is different on different planets, so the weight of an object on different planets (or moons) is different ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth.

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

Mars' atmosphere moves differently from Earth's due to gravity waves. These waves affect air circulation at high altitudes.

Although gravity is dominant over large cosmic scales and near very large masses like planets or stars ... The two theories generally work at very different scales, so that’s not a huge problem.