APOD
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Shuttle Plume Shadow Points to Moon
Explanation: Why would the shadow of a space shuttle launch plume point toward the Moon? In early 2001 during a launch of Atlantis , the Sun , Earth , Moon , and rocket were all properly aligned for this photogenic coincidence . First, for the space shuttle 's plume to cast a long shadow, the time of day must be either near sunrise or sunset . Next, just at sunset, the shadow is the longest and extends all the way to the horizon . Finally, during a Full Moon , the Sun and Moon are on opposite sides of the sky. Just after sunset , for example, the Sun is slightly below the horizon , and, in the other direction, the Moon is slightly above the horizon . Therefore, as Atlantis blasted off, just after sunset , its shadow projected away from the Sun toward the opposite horizon, where the Full Moon just happened to be.
| Date | June 3, 2007 |
|---|---|
| Credit | Credit: Pat McCracken, NASA |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |



