Fail.
"This application requires the Unity 3D plug-in.
Unfortunately, the Unity 3D plug-in is only supported on Windows 2000/XP/Vista/7 and Mac OS X 10.4 or newer."
Linux may be OS to the Gods, but not to NASA's PR wonks.
NASA is making many a child's dream come true by letting the public take a trip through the solar system – and you don't even have to leave your living room. Eyes on the Solar System NASA's new site: Eyes on the Solar System. The space administration is putting actual mission data on an interactive website, Eyes on the Solar …
and the feedback feature doesn't work, tried it with IE and Firefox, just doesn't display a Captcha image, won't reload or play a sound, so no way to ask/suggest if they could add a measure toggle or just default to a real scientific measures scheme.
Would help the US and UK to get used to the idea of using a WW standard and prevent future robot missions trying to penetrate remote landscapes.