Live coverage of the countdown and launch of a Rockot launcher with Europe’s Sentinel 3B environmental monitoring satellite. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
Mission Reports
Astronauts finish repairs to space station cosmic ray detector
During a fourth spacewalk Saturday to wrap up repairs of the coolant system in a $2 billion cosmic ray detector, Italian astronaut Luca Parmitano and Drew Morgan discovered a leak in one of eight coolant lines that were spliced into a new pump module during three earlier excursions. But Parmitano was able to tighten a fitting on the line and the astronauts were able to complete the repair work, setting the stage for the instrument to resume science operations.