CAPE CANAVERAL, Fla. — Blue Origin called off the launch of its giant New Glenn rocket carrying twin NASA Mars probes on Sunday (Nov. 9) due to bad weather at its Florida pad, one day before new federal restrictions take effect for commercial spaceflights.

Sending anything to Mars is a much more difficult process than it seems. In the 1960s, the Soviet Union tried (and failed) in its first nine consecutive attempts, and the US was only able to succeed in quick flybys.