Live coverage: Atlas 5 countdown and launch journal

A hundred days after the last U.S. commercial resupply of the International Space Station by a Cygnus cargo ship launched atop an Atlas 5 rocket, the booster and freighter duo will do it again Tuesday.

Persistent problems with a seismometer instrument package will keep NASA’s InSight Mars lander from departing for the red planet during a March launch period, and officials said they will consider shelving the $675 million project if the issues prove too costly to fix.

A pair of television broadcast satellites for AT&T and Eutelsat rocketed into orbit Thursday evening, riding a European Ariane 5 launcher into space in a spectacular sunset launch from the Guiana Space Center on the northeastern coast South America.