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.

2008 June 4
See Explanation.
Moving the cursor over the image will bring up an alternate version.
Clicking on the image will bring up the highest resolution version
available.

Chasing the ISS
Credit & Copyright: Jürgen Michelberger

Explanation: Bathed in sunlight, the International Space Station (ISS) arced through the evening sky above the town of Lauffen in southern Germany on May 31st. The timing of the bright passage was about 10 minutes after the launch of the Space Shuttle Discovery on the STS-124 mission from Kennedy Space Centre, Florida, in the southeastern US. Of course, Discovery was headed toward an orbital rendezvous with the ISS. In chasing after the space station, the shuttle also made a pass over Lauffen just 21 minutes after launch. With a camera fixed to a tripod, astronomer Jürgen Michelberger recorded both magnificent machines streaking overhead in two different time exposures, each about 2 minutes long, and merged them in this composite view. Parallax causes the paths of the ISS (right) and Discovery (near centre) to seem to diverge as they were at very different altitudes. Stars (and bright planets) leave two, separated, short trails. The brief, flaring track of an Iridium satellite and faint dotted trail of a passing airplane are also visible. A close inspection will reveal a dim reddish track, the jettisoned external fuel tank, just left of Discovery. Placing your cursor over the picture should help identify some of the features.


Tomorrow's picture: fist full of stars


< | Archive | Index | Search | Calendar | RSS | Education | About APOD | Discuss | >

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.