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 ...

A new relative fat mass (RFM) equation based on height-to-waist-circumference ratio better predicts the percentage of whole-body fat in men and women than body mass index (BMI), new research indicates ...

Gravity pulls objects together; the closer they are, the stronger the pull. Energy and mass are equivalent and interchangeable (E=mc²). The universe's expansion speed is linked to a galaxy's distance.