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Unlike NewtonThree, which burns only once per mission, NewtonFour completes multiple burns to ensure we deploy the satellites into their target orbits.
As planned, the upper stage has now shut down and will coast about halfway around Earth before the engine relights to complete the mission.
We're waiting for the rocket to coast halfway around Earth, deploy its payload, and downlink telemetry. Even when you're moving ~20,000 miles per hour, it takes a while to circle our planet! 🌎
Are you ready to make history together? ✈️🚀💫 Join us as we launch our #StartMeUp mission today, the FIRST launch from the UK! Follow this thread for all launch day updates 🧵
Lucky launch socks = CHECK. ✅ Popcorn = CHECK. ✅ Tune into the livestream with us here, starting at 1:15pm PT/9:15pm GMT: virg.in/J8hC 
What’s on board? Our #LauncherOne is carrying nine payloads to orbit in partnership with the United Kingdom’s Ministry of Defence (MOD) and the United States’ National Reconnaissance Office (NRO).
