This is the first in a sequence of four pictures from the
artist's impression of the extrasolar planet HD 189733b, now known to have methane and water. Astronomers used the Hubble Space Telescope to detect methane - the first organic molecule found on an extrasolar planet
Blue straggler stars are blue, bright stars, with a higher mass than the average for a cluster, and they are expected to sink towards the centre of a star cluster over time.
This image combines Hubble observations of Messier 106 with additional information captured by amateur astronomers Robert Gendler and Jay GaBany. Gendler combined Hubble data with his own observations to produce this stunning colour image. Messier 106 is a relatively nearby spiral galaxy, a little over 20 million light-years away.