What's happening is that within each galaxy cluster, there's no expansion. In our own (called the "local group") the biggest galaxy is actually approaching our own Milky Way. But the space between clusters is growing larger. You can count on this much to be totally true.
What's happening is that within each galaxy cluster, there's no expansion. In our own (called the "local group") the biggest galaxy is actually approaching our own Milky Way. But the space between clusters is growing larger. You can count on this much to be totally true.