Jet Propulsion Laboratory Home Page
Jet Propulsion Laboratory Website National Aeronautics and Space Administration Website
JPL Home Page Earth Solar System Stars and Galaxies Technology Search
Images and Videos News Missions Events Kids Education Scientists and Engineers About JPL
Upper-left corner   Upper-right corner
  MISSIONS
Dot CURRENT

Dot FUTURE

Dot PROPOSED

Dot PAST



RELATED LINKS:

Dot Galaxy Evolution Explorer Home Page

Dot Launch of Galaxy Evolution Explorer

 
Click here to return to previous page

Current Missions - Galaxy Evolution Explorer

Galaxy Evolution Explorer

Launch: April 28, 2003
Purpose: Ultraviolet study of history of star formation

The Galaxy Evolution Explorer is an orbiting space telescope that makes observations at ultraviolet wavelengths to measure the history of star formation in the universe 80 percent of the way back to the Big Bang. Since scientists believe the universe is about 13 billion years old, the mission will study galaxies and stars across about 10 billion years of cosmic history.

The spacecraft's mission is to observe hundreds of thousands of galaxies, with the goal of determining how far away each galaxy is from Earth and how fast stars are forming in each galaxy. A galaxy’s ultraviolet brightness tells us how fast its stars are forming. Mission scientists will be trying to find stars that have recently formed, so they will be looking for stars whose appearance reveals them to be young. These are the most massive stars, which are so hot they shine in ultraviolet wavelengths.

Scientists would like to understand when the stars that we see today were formed, and when the chemical elements that make up our Milky Way galaxy formed. We know they formed in the interiors of stars, but we don't know when. Information gathered by the mission will fill in one of the missing pieces of the puzzle to explain how the visible universe came to be.

Partnering with JPL on the mission are the California Institute of Technology, Pasadena, Calif.; Orbital Sciences Corporation, Germantown, Md.; University of California at Berkeley; Yonsei University, Seoul, Korea; Johns Hopkins University, Baltimore, Md.; and Laboratoire d'Astrophysique de Marseille, France.

For more information, see the Galaxy Evolution Explorer home page.

Bottom-left corner   Bottom-right corner  

Privacy / Copyright FAQ Feedback Site Map