By obtaining periodic Doppler shifts in the components of ORGANIZATION@1 , PERSON@1 proved that the latter was a binary star ; thus , ORGANIZATION@1 was one of the first known spectroscopic binaries -LRB- and it is also known to be an eclipsing binary -RRB- .

PERSON@2 proved that ORGANIZATION@1 was a double star that could not be seen -LRB- spectroscopic binary star -RRB- and it was one of the first of these double stars proven to exist .
