Live coverage: SpaceX launches more Starlink satellites

The launch of a NASA research satellite built to probe conditions along the boundary between Earth’s atmosphere and space has been tentatively rescheduled for no earlier than Wednesday, pending the conclusion of a review of unexpected data signatures discovered on the first stage of the mission’s air-launched Pegasus XL rocket.

A commercial module mounted outside the International Space Station last year will remain attached to the orbiting research complex for at least three more years, carrying out additional tests for future space habitats and serving as a storage closet for the lab’s crew.

If you plan to watch athletes compete on the track or in the water during this year’s Summer Olympics in Rio de Janeiro, there’s a good chance the television signals will be relayed from Brazil using a new Eutelsat communications satellite launched Wednesday aboard an Ariane 5 rocket.