... Tonight's Sky . ... Observing . ... Star Atlas . ... solar system . ... stars . ... Micro-planets and mini-systems . ... Wolszczan and Konacki discovered the new planet by tracking periodic changes in the star's pulses, the same technique that uncovered the other planets in the system. ... Instead, says Wolszczan, the existence of these planets indicates the system probably had a second star in orbit originally. ... Only registered members of Astronomy.com are allowed to comment on this article. ...