The star, KIC 8462852 (also known as Tabby's Star), is a seemingly normal F-type star in the constellation Cygnus.What makes it unusual is the seemingly unpredictable nature of its luminosity.
What makes KIC 8462852 unusual is both the degree of dimming (depth) and the seemingly random nature of its dimming. Unlike other exoplanets there does not seem to be a regular period dimming (which would be caused by a planet moving in a circular orbit). In addition, the depth of some of minimums has been as much as 20% of the star's brightness!
There have been a few attempts to explain the light curve:
- Young Star with an asymetric dust ring
- Planetary collision resulting in debris in the system
- Comet swarms passing through our line of sight
- Ringed planet with asteroids in front and behind it
- An Alien megastructure (Yes. Aliens!)