Cygnus X-1

Cygnus X-1 was the First Black Hole Ever Found. New Measurements Show it's Much More Massive Than Previously Believed

New parallax measurements of Cygnus X-1 by the VLBA find it is more distant than we thought, and therefore more…

1 year ago

The Cygnus Constellation

Located in the northern hemisphere is the Cygnus constellation, one of the 48 constellations identified by Ptolemy and one of…

5 years ago