Is probably the number one goal of cosmologists today .
可能是宇宙学家现在排在第一号的对象。
Some cosmologists think this expansion will leave the milky way galaxy as an " island universe " in a few trillion years with no other galaxies visible .
一些宇宙学家认为这种膨胀将使得银河系在接下来的几万亿年里变成一个宇宙岛并且将没有其它可见的星系。
The existing amounts of hydrogen and helium match theory perfectly - so well , in fact , that cosmologists claim this is the best evidence we have for the big bang .
