give it to the guy in the museum and he'll let you look around
there is not a second gold coin
you can get the coin in astro knights island on the fountain
The gold coin in Astro-knights is in the fountain. You will see something glittering in the water, and if you pick it up, it will be the coin. Use it to pay your admission to the Mordred museum.
If you climb the fountain, it is in the water halfway up.
There is a gold coin outside in the fountain.
In order to get the coin from the fountain in Poptropica Astro Knights Island, you must go to the fountain and look for the shiny coin. Once you spot it, you walk over to it and it will be added to your dock.
After you get the coin the Museum of Mordred place and give it to the guy in there. Hope it helps.:)
to get the gold coin on astro knights you go on to the rocket ship fountin. at some point you will see a shimer. and that's were the gold coin is. hope that helps!
You do not get or use a bucket on Astro Knights Island.
Jump up on the fountain (a gold coin is about halfway up on the right).
There is no treasure chest on Astro Knights Island.
Jump to the second level where you see the sparkle.