Mar 17 1993
From The Space Library
NASA and the European Space Agency (ESA) were cooperating on an experiment that involved three spaceships "listening" for passing gravitational waves. The spaceships, now travelling to separate destinations in the solar system, were NASA's Mars Observer, Galileo, and the ERS's Ulysses spacecraft.
Such waves of gravity have never been directly detected, although their existence was predicted decades ago in Einstein’s theory of relativity. The joint NASA-ESA experiment would be the first time three spacecraft would make observations simultaneously, thus greatly increasing the reliability of any detection. (NASA Release 93-38; AP, Mar 22/93)
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