General Mission Science

By going above the earth's atmosphere instruments now have access to the ultraviolet portion of the electromagnetic spectrum . Ultraviolet photons have short wavelength and high energy and thus come from sources which have fairly high temperatures. Some of these sources include:

In addition, the background glow of the night sky is at a minimum level at around 2000 angstroms. There exists a population of galaxies which have very low contrast with respect to the background. It is hoped that these very diffuse galaxies can be more easily imaged at a wavelength where the noise from a background of finite brightness is at its minimum.

The Electronic Universe Project