Dark glow

 
Last Updated: Saturday 04 July 2015

Visible celestial bodies account only for about 10 per cent of the total mass of the universe. Astronomers scouring the heavens for the remaining invisible "dark matter" may have now spotted some of it in the form of a halo in a faraway spiral galaxy (Science, Vol 265, No 5175).

Astronomer Penny Sacket and her colleagues at the Institute for Advanced Study at Princeton report that the halo was obtained after using computers to subtract the light from the galaxy and other stars; its shape matched the expected spread of the galaxy's dark matter.

Subscribe to Weekly Newsletter :

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.