Yes, that's an apple floating in zero gravity. This is just one of a bunch of arresting images that just went online. Nikon sent a high-res SLR camera aboard the International Space Station with NASA's astronauts. More pics below.
I love all of the photos from the ISS — Soichi Noguchi's Twitter stream is must-follow material — but these Nikon pics give the best impression I've seen so far of what it must be like to be like to live aboard the station. And the views of the Earth are stunning. More pics at the link. [My Nikon Life via Photo Art Gallery]