images

Star trails - The constellation of Orion

by

David Malin Images/Novapix

Reference

a-pas01-10052

Date

2007-01-02

Here one sees the stars of the constellation of Orion recorded in an exposure of about 30 minutes, during which time the lens focus was moved from infinity to about 1 metre in a series of 10 steps about three minutes apart. The effect is to reveal the star colours and that of the vivid red Orion nebula.