The spots represent temperature variations in the early universe . As our universe expanded and cooled , conglomerations of mass formed. By studying the size and distribution of the spots found on the microwave background , astronomers hope to learn what matter and processes caused the spots to form - and hence determine the composition, density, and future of our Universe . Results from recent measurements of the cosmic microwave background are consistent with a universe stranger than previously thought, possibly filled with unexpected forms of dark matter and dark energy . A more detailed analysis might result after NASA 's Microwave Anisotropy Probe is launched in 2001.
Specific rights apply .