The Rossi X Ray Timing Explorer has observed the first direct evidence of the rotation of a black hole. Observations show a black hole eating up a nearby companion star. The matter form the star collects on an accretion disk that is orbiting the black hole before it plunges into the black hole itself. The disk is hot enough to emit X- rays. By measuring the changes in the X-rays the scientists at the Goddard Space Flight Center, USA, have inferred that the black hole is spinning and the accretion disk is at a distance of about 45-50 kilometres from the black hole (xxx.lanl.gov/astroph, No 0104487).
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
.png)
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.