Those clever folks at NASA are providing more than one way to skin the Curiosity viewing cat.
A quick scan of the internet this morning will show you that in a handful of hours, NASA's Curiosity rover will be making a spectacular entrance onto the surface of the red planet.
The official site to the stream is nice and light, but it's held back by the use of Flash — at least, on my Linux desktop.
If you don't want Flash chewing up your CPU cycles, the best way is to use your media player of choice to view the stream.
I have a working stream this morning by using:
You can always substitute vlc for your media player of choice; I had no luck with totem, but mplayer worked fine.
And if that doesn't work, there are plenty of other options available in this thread at Reddit's /r/linux.