Scientists are studying the nebula's turbulence and unique hourglass shape, possibly caused by interactions between its two central stars. The photo zooms in on NGC 1514, a planetary nebula about ...

At close: April 22 at 4:00:01 p.m. EDT ...

Read our review of Ghosts, starring Callum Scott Howells, Victoria Smurfit and Patricia Allison, now in performances at the Lyric Hammersmith to 10 May.