In 1998, scientists discovered that the expansion of the universe has been accelerating.

What force is causing this phenomena?

A:dark energy
B:Hubble’s law
C:the Doppler effect
D:background radiation

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .