11. Deneb , the brightest star in Cygnus, marks the swan's tail.12. Except in areas close to the equator, Deneb permanently circles the North pole. 13. Deneb Algedi is a Beta Lyrae variable star ( a type of eclipsing binary ).14. Deneb ( Arabic for " tail " ) marks the tail of Cygnus the Swan.15. Deneb Robotics is known for their IGRIP, Quest, Ultra and VirtualNC software packages.16. The brightest recent example was magnitude 2.0 ( nearly as bright as Deneb ). 17. The orientation of Deneb and Sadr would make a useful clock hand for telling sidereal time. 18. There are six forms : Atlas, Castor, Deneb , Mizar, Rigel and Sirius. 19. Deneb Algedi is the ( relatively ) bright star in the upper east side of the constellation.20. Alexander Thom suggested that Avebury was constructed with a site-to-site alignment with Deneb .
