Super Mario Galaxy Tips

Giant Spider - Space Junk
Having trouble with the giant spider? There's a hidden action point that I found!

When the battle starts, jump onto a web slinger and batter his head. This will keep him still for a bit. Then, find a web slinger and fly towards his rear. He will flip over. Destroy the three red sacs. He will flip back over. Now, green webs shoot from the green sacs. Batter his head once again, and fly towards his rear... again. Desrtoy the red sacs one more time. Watch the spider fall into space.

Now, simply get onto a web slinger and get the power star!