You are supposed to look around the levels for stars that are green which are hard to find because they are either well hidden or hard to reach
When you get 120 stars you see a green comet and scatters 120 green stars
there red
Super Mario Galaxy 2 has 242 stars in the game, just like the prequel. However, the green stars only appear after you get 120 stars.Green stars appear in every galaxy (except Grandmaster Galaxy). Usually there are 2-3 green stars in a galaxy. Now the objective is to find the hidden stars in the galaxy, which can prove quite challenging.After getting all the green stars, you end up with 240 stars, which will unlock the final galaxy: the aforementioned Grandmaster Galaxy. There are 2 stars in the galaxy, which will bring the total to a satisfying 242.So in summary, you can only get the green stars after having 120 stars.I hope that helped!- Ryanthelion
122 power stars and 120 green stars.
Bowser
120.
To get green stars, you go through each level and look for green stars. You can also listen for the star "sound."
yes there is you might need help from a friend and walkthroughs/cheats.
the trial galaxy rock is on top of the observatory (or around it). you have to get the three green power stars and a green launch star will appear use it to get to the trial galaxy rock.
120 Green Stars 120 Power Stars 49 Comet Medals Got the game yesterday. Its awesome and EPIC! (Get all these for the Grandmaster Galaxy) source from : Super Mario Galaxy 2 Game Guide by PRIMA Games and Nintendo
You don't! There are no red stars on Super Mario Galaxy 2
There is currently no Super Mario Galaxy 3. If you mean Super Mario Galaxy 2 there are 242 stars.