Judging by the scale of the spaceships and the space station surrounding it, the planet surrounded by the space station Ringo Vinda appears to be far too small (only a few dozen miles) in diameter to be considered a planet.
The clone medic dons a face mask when the medical shuttle is attacked by droids to guard against decompression. A face mask would be of no help in the event of decompression, as space is 2.7 Kelvin and a face mask provides no protection from extreme temperatures.