How do we know the mass of a planet originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique insights. Answer by Geoffrey Widdison on ...

The terms weight and mass are often used incorrectly. Phrases like ‘a bag of sugar weighs 1 kg’ are not scientifically correct. This means that a 1 kg mass would be attracted to Earth by a force of 10 ...

Michael Wysession, an associate professor of earth and planetary sciences at Washington University, explains. There is an easy answer to this question, and it involves some good news and some bad news ...

An object's weight on the Moon is approximately one-sixth its weight on Earth, illustrating the variation in gravitational force across celestial bodies. While an object's mass, measured in kilograms, ...

Does a person get lighter the higher above the Earth they move? If so, do they get heavier the closer to the centre of the Earth they move, such as down a mine shaft?— Ian Weight is the way we usually ...

Environmentalists often say that humanity needs to shrink its planetary footprint. Now, a new study has demonstrated how literally massive that footprint is. While the mass of Earth’s life forms ...