is it possible for the moon to catch on fire, as there is no gravity, so wouldnt the fire just float in the air?

Question: is it possible for the moon to catch on fire, as there is no gravity, so wouldnt the fire just float in the air?
- Keywords:
  fire,
  gravity,
  moon
Asked by cerys to Adam, Catherine, Karen, Leila, Nazim on 15 Mar 2012.
- Adam Stevens answered on 15 Mar 2012:
  
  Fire needs air (oxygen) to burn. There’s no air on the moon, so a fire couldn’t happen.
  
  The worst thing that could happen is to get a fire in a spaceship though. Since they breathe a higher % of oxygen the fire burns very well. But actually like you say, the fire behaves differently. It forms a sphere rather than a flame shape, and because heat doesn’t rise it is a lot hotter in the middle of the flame.
- Leila Battison answered on 15 Mar 2012:
  
  I didn’t know that about fire making a sphere in space, so I looked for a video. This is pretty awesome!
  
  But no, without oxygen on the moon, you wouldn’t get fire. Plus there’s not really anything up there that would burn anyway, it’s all just rock and dust (not cheese!)
- Karen Masters answered on 16 Mar 2012:
  
  The Moon does have gravity – just smaller than here – about 1/6th of the Earth’s.
  
  What it doesn’t have is any atmosphere, so no oxygen, which is needed for a fire to burn.

Question: is it possible for the moon to catch on fire, as there is no gravity, so wouldnt the fire just float in the air?