Other missions will probe the universe's origin, including two spacecraft set for launch in 2007: Herschel and Planck. Herschel is a space telescope that will see from far-infrared to submillimeter wavelengths. It will scrutinize the "cold" spectra of the universe, probing how stars and galaxies form. The Planck spacecraft will map the cosmic microwave background, the echo of the Big Bang, with greater accuracy than ever before (greater than either COBE or WMAP).
LISA Pathfinder will launch in 2008. This mission is a precursor to and technological test bed for ESA and NASA's Laser Interferometer Space Antenna (LISA), set for launch in 2013 to detect gravity waves. Albert Einstein's theory of general relativity predicts gravity waves, and their detection will help astronomers understand the universe's structure.
These are only a few of the many missions ESA has planned. For more on these and other science missions under development, visit ESA's site