Supernovae prove Newton's law of gravity unchanged over cosmic time | sen.com | Informationist | Scoop.it

(Sen) - By combining all observations of supernovae ever made, Australian astronomers have determined that the strength of gravity has remained unchanged over the last nine billion years.

 

Newton’s gravitational constant, known as G, describes the attractive force between two objects, together with the separation between them and their masses. It has been previously suggested that G could have been slowly changing over the 13.8 billion years since the Big Bang.

 

If G has been decreasing over time, for example, Earth's distance to the Sun would have been slightly larger in the past, meaning that we would experience longer seasons now compared to earlier points in the Earth’s history.


Via JRSchmit