Home » News & Blogs » Einstein’s Ultimate Test: Star S0–2 To Encounter Milky Way’s Supermassive Black Hole
Bookmark and Share
Starts With a Bang!

Einstein’s Ultimate Test: Star S0–2 To Encounter Milky Way’s Supermassive Black Hole

5 Mar 2018, 15:01 UTC
Einstein’s Ultimate Test: Star S0–2 To Encounter Milky Way’s Supermassive Black Hole
(200 words excerpt, click title or image to see full post)

This artist’s impression shows the orbits of stars around supermassive black hole at the centre of the Milky Way. In 2018 one of these stars, S0–2, will pass very close to the black hole, presenting the best opportunity to study the effects of very strong gravity on its light and orbit. (ESO / L. Calçada)After a 16 year wait, the star SO-2 will speed past our galaxy’s supermassive black hole at 2.5% the speed of light. It will be the first-of-its-kind test of Einstein’s theory.This year, for the first time, astronomers will observationally measure a gravitational redshift around a supermassive black hole.The spacetime curvature around any massive object is determined by the combination of mass and distance from the center-of-mass. At our galaxy’s center, a black hole 4 million times the mass of the Sun will allow us to measure gravitational redshift there, testing Einstein’s General Relativity in a new way. (T. Pyle/Caltech/MIT/LIGO Lab)When an object gets close to a massive source, its light must “climb out” of the deformed spacetime predicted by Einstein.When a quantum of radiation leaves a gravitational field, its frequency must be redshifted to conserve energy; when it falls in, it must be blueshifted. Only if ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day

astronomy_pod