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 ...

Your weight changes on other planets and moons due to different gravitational pulls. Weight is how much gravity pulls on you; mass (amount of matter) stays the same. Newton's Law of Gravitation ...

Researchers in the Netherlands and in the US are the first to measure directly the mass of a planet orbiting a star other than our Sun. In developing their new technique, they also discovered that ...

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 ...

The mass of a planet orbiting a distant star has been measured using a new and precise method. Astronomers say it will shed fresh light on how planets are formed. George Benedict and colleagues at the ...

Astronomers have found and measured the mass of the lightest known planet outside the solar system, a "fluffy" celestial body 200 light-years away that weighs as much as Earth but has a much thicker ...