The Case of the Very Dusty Binary Star . ... Credit Copyright: Lynette Cook Explanation: For astronomers , close binary star system BD+20 307 originally stood out because it is extremely dusty. A substantial amount of warm dust surrounding it causes the system to appear exceptionally bright at infrared wavelengths. ... But the BD+20 307 system has now been found to be at least a few billion years old, an age comparable to the age of our own Solar System. ... NASA Official: Jay Norris. ...