In an "open universe,"
a. the steady-state theory is correct.
b. new matter is constantly being created.
c. the universe will continue expanding forever.
d. we may be able to travel into another universe.

Which events occurred during the space race? check all that apply. (a) nasa was established. (b) yuri gagarin orbited earth. (c) the soviet union launched salyut. (d) the united states launched skylab. (e) the united states launched explorer 1.