Astronomy Picture of the Day - 9/8/2018

Credits: NASA, ESA, and Z. Levay (STScI) 
Acknowledgment: J. Bell (ASU) and M. Wolff (Space Science Institute)

The sharp eye of NASA's Hubble Space Telescope has captured the tiny moon Phobos during its orbital trek around Mars. Because the moon is so small, it appears star-like in the Hubble pictures.

Over the course of 22 minutes, Hubble took 13 separate exposures, allowing astronomers to create a time-lapse video showing the diminutive moon's orbital path. The Hubble observations were intended to photograph Mars, and the moon's cameo appearance was a bonus.