Astronaut tweets UFO photo?

Conspiracy theorists have latched onto a photo that astronaut Scott Kelly tweeted from the International Space Station as proof of a UFO in space.

Kelly, who is spending a year in space, has been tweeting many photos of Earth from space.

On Sunday he tweeted one with the caption:  "Day 233. Once upon a #star over Southern India. #GoodNight from @space_station! #YearInSpace" but what caught some peoples' attention is what appears to be an object in the upper right corner.

Some people believe it is actually an antenna actually attached to the space station but others see it as a clearly visible UFO.

The image has been retweeted almost 5,000 times and favorited 85-hundred times.  Kelly has not responded to clear up the issue.