KEY POINTS
  • NASA astronauts Bob Behnken and Doug Hurley became the first people to launch into space on a SpaceX built capsule and rocket.
  • "The ride I'll say was a little bit smoother than our shuttle experience." Behnken told CNBC's "Squawk on the Street."
  • Behnken and Hurley joined fellow NASA astronaut Chris Cassidy on the space station. Cassidy rang the Nasdaq stock market opening bell on Tuesday to celebrate the launch's success.

SPACE ― The pair of astronauts who served as test pilots for SpaceX's launch last weekend say the experience was an enjoyable one, even better than the space shuttle they flew on before.

"The ride I'll say was a little bit smoother than our shuttle experience. The shuttle was a little bit rougher, at least at the beginning," NASA astronaut Bob Behnken told CNBC's "Squawk on the Street" on Tuesday, speaking from the International Space Station.