Live coverage: Ariane 5 blasts off with two Intelsat satellites

The shift in launch date is to allow more time to build in redundancy to account for the helium leak. The launch is currently scheduled for no earlier than Saturday, May 25, at 3:09 p.m. EDT (1909 UTC).

A Boeing-built Intelsat communications satellite launched three years ago is drifting in geostationary orbit more than 22,000 miles over the equator after suffering a fuel leak and releasing debris fragments last week, according to an analysis by space surveillance experts.

After replacing a faulty inertial measurement system blamed for a scrubbed launch attempt Sunday, a Soyuz rocket headed to space from French Guiana today with five satellites, including the next spacecraft for Europe’s multibillion-dollar Earth observing network and a French experiment to probe the validity of Einstein’s theory of general relativity.