Home » Press Releases » Precision Pointing: It's a Matter of Scale
Bookmark and Share
NASA: Kepler News and Features

Precision Pointing: It's a Matter of Scale

4 Sep 2013, 18:41 UTC
Precision Pointing: It's a Matter of Scale

For four years, the Kepler spacescraft continuously and simulatenously observed and collected data on more than 150,000 stars. Its mission-- to determine if Earth-size planets orbiting in the habitable zone of stars like our sun are common or rare. 
The stability of Kepler's pointing is measured in degrees, arcminutes, arcseconds and milli-arcseconds. To put that into perspective, the image compares the measurements using a movie theatre screen, a small bag of popcorn, a kernel of corn and a grain of salt. 
During the four years of science operations, the pointing precision of the spacecraft was controlled to within a few milli-arcseconds. That is the equivalent of keeping your gaze steady on a grain of salt from a quarter mile away.
The next time you're asked to pass the salt shaker think of the Kepler space telescope, and share its story.

Note: All formatting and links have been removed - click title or image to see full article.

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day

astronomy_pod