Live coverage: Vega rocket launches with LISA Pathfinder

Rookie astronaut Raja Chari — a former U.S. Air Force fighter pilot — veteran physician-astronaut Tom Marshburn, and European Space Agency astronaut Matthias Maurer have been assigned to fly to the International Space Station on a SpaceX Crew Dragon spaceship in the fall of 2021.

An Ariane 5 rocket launched from French Guiana at 2150 GMT (5:50 p.m. EDT) Thursday with a pair of European-built communications satellites for the Brazilian government and KTsat, a South Korean telecom operator. Liftoff was delayed more than one hour to resolve a problem with ground equipment.

SpaceX intends to cut the price of a Falcon 9 rocket launch by up to 30 percent when flying with reused first stage boosters, an achievement the company still hopes to demonstrate before the end of the year, SpaceX’s president said recently.