A system of two stars orbiting a common center of mass, bound together by gravitational forces.
Source: apod.nasa.gov

08/07/2004

12/02/2004

14/03/2003

14/02/2003

27/01/2003

08/10/2002

27/09/2002

17/06/2002

24/03/2002

10/10/2001

24/07/2001

07/06/2001

24/05/2001

16/05/2001

19/01/2001

28/11/2000

06/10/2000

21/09/2000

14/09/2000

13/06/2000

11/06/2000

19/01/2000

15/12/1999

31/10/1999

02/04/1999

01/11/1998

29/07/1998

23/07/1998

22/04/1998

06/01/1998