Hihi, that's right, all the ä's fooled me. It's definetly 'edge of the ice',
jää is ice and
äär is edge. Would be
jään ääri in my native Finnish, two words, so I didn't even think of the possibility of an word with four
ä. But there you have it, so sorry about the aries

Also note that the dots on the letters make a huge difference as well,
a is a different letter from
ä in both Estonian and Finnish,
Jaaaar would be an altogether different story - the rock group is not familiar to me at all, so no comments on which one is the name (though of course I understand you simply might not be able to dot you ä:s on your keyboard).