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Letter: So how big is this Jupiter-sized black hole then?

Published 6 February 2019

From Richard Price, Chipping Sodbury, Gloucestershire, UK

You report that there may be an intermediate-mass black hole the size of Jupiter in our galaxy (19 January, p 14). Wouldn't one of these have significantly greater mass than the planet?

The editor writes:

• The diameter of the event horizon of the suggested black hole would be roughly Jupiter's diameter. The it would be about 30,000 times the mass of our sun.

Issue no. 3216 published 9 February 2019

Â鶹´«Ã½ issue 3216 cover

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