We are some of the astrophysicists and Planet Hunters behind the discovery of KIC 8462852 (a.k.a. Tabby’s star), the mysterious star that has become a favorite SETI target. As us anything!
My short bio: I am an astrophysicist at Penn State University, and I mostly work on exoplanets and stars, and sometimes a bit of non-radio SETI (the Search for Extraterrestrial Intelligence).
The Planet Hunters citizen scientist project discovered a strange star observed by the Kepler space telescope whose light is occasionally blocked by "a swarm of somethings."
The head of PlanetHunters, Dr. Tabetha Boyajian, showed me the Kepler data of this star in case I had some idea what it might be. It's got us all baffled — our best guess is that it's got a giant swarm of giant, dusty comets orbiting it, and we're doing a lot of work to figure out what it is.
In fact it's it's so strange — and also pretty much what SETI astronomers thought Kepler might find if aliens built giant megastuctures — that I teamed up with the Berkeley SETI Research SETI to start a radio SETI campaign to look into it.
Background: Here is the article that got things started in the media: [http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/]
Here is a nice summary by Phil Plait: http://www.slate.com/blogs/bad_astronomy/2015/10/14/weird_star_strange_dips_in_brightness_are_a_bit_baffling.html
Here is my general take, which probably will answer a lot of your questions: http://sites.psu.edu/astrowright/2015/10/15/kic-8462852wheres-the-flux/
Also look out for the PlanetHunters citizen scientists and astronomers, including the eponymous Dr. Tabetha Boyajian, who will be answering questions using the reddit accounts KIC_8462852 and PlanetHunters
Update: Thanks for a great AMA, gang. I've got to go pick up the kids now, but I'm sure you'll hear more about Tabby's star as more data come in and we finally figure out what this thing really is!