Ask the science advisor of Gravity, Kevin Grazier, anything you want!

There have been a lot of questions about the scientific plausibility of Alfonso Cuaron's hit movie Gravity — so we've asked the film's science advisor, Kevin Grazier, to come in and answer your questions. Grazier has also worked on Battlestar Galactica, Eureka and Defiance.

Grazier spent 15 years at the Jet Propulsion Lab at NASA, where he was a research scientist and science planning engineer — working on, amongst other things, the Cassini ISS (Imaging Science Subsystem), a system combining a range of wide and narrow angle cameras responsible for generating equally stunning footage and data. But you may also be familiar with him for his work behind a very different kind of camera.

Grazier is joining us today, to answer our questions about space, pop culture, science advising, and the intersection of the three. Start putting your questions into the comments below and then, at 2pm (PDT), Kevin will be joining us to answer a few of them.

Image: CICLOPS / NASA