c

Sweeping spiral arms extend from NGC 4536, littered with bright blue clusters of star formation and red clumps of hydrogen gas shining among dark lanes of dust. NGC 4536 is also a starburst galaxy, in which star formation is happening at a tremendous rate that uses up the gas in the galaxy relatively quickly, by galactic standards. NGC 4536 is approximately 50 million light-years away in the constellation Virgo. It was discovered in 1784 by astronomer William Herschel.

Chris Friel, from the series 180524

Saturn's moon Dione drifts before the planet's rings, seen here almost edge on. For all their immense width, the rings are relatively paper-thin, about 10 meters in most places. For its part, Dione is about 1,123 kilometers across.