Which statement is true about the solar system? a) inner planets have more moons than outer planets have. b) inner planets are gaseous; outer planets are terrestrial. c) inner planets orbit at a lower rate than outer planets do. d) inner planets are more dense; outer planets are less dense.

What some science videos to you

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11