White dwarf study suggests planets are as old as their stars "This is just the beginning – every time we find a new white dwarf, we can gather more evidence and learn more about how planets form. It's amazing that we're able to probe processes like this in exoplanetary systems," Bonsor said. If gravity overpowers expansion, the cosmos will collapse in a Big Crunch. If the universe continues to expand indefinitely, as expected, we'll face a Big Freeze. But if dark energy pushes the expansion rate to near infinity, we'll have a Big Rip that tears everything, even atoms, apart.