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Just past the 45-minute mark of the Starship vehicle\u2019s journey through space on Thursday, something eerie happened. As it drifted high above Earth\u2019s oceans and clouds, the spacecraft\u2019s silvery exterior was overtaken by a brilliant and fiery orange glow.<\/p>\n<\/div>\n<\/div>\n
When a spacecraft re-enters the atmosphere, the air beneath it gets hot \u2014 hot enough that it turns into a plasma of charged particles as electrons are stripped away from the air molecules. The charged particles create picturesque glows, like neon signs.<\/p>\n
But seeing this happen in nearly real-time during a spaceflight is uncommon. That plasma disrupts radio signals, cutting off communication.<\/p>\n<\/div>\n<\/div>\n
Such blackouts happen, for instance, when SpaceX\u2019s Crew Dragon capsule returns to Earth from the International Space Station with its complement of four astronauts. Mission controllers must wait with bated breath to be reassured that the spacecraft\u2019s heat shield has held up and protected the crew during atmospheric re-entry.<\/p>\n
Until Starship succumbed to the intense forces of re-entry on Thursday, SpaceX used its Starlink internet satellites to relay the live video feed. The Starlink satellites are in higher orbits, and sending signals upward \u2014 away from the plasma \u2014 is easier than trying to communicate through it to antennas on the ground.<\/p>\n
But Starship wasn\u2019t the only spacecraft in recent weeks to give us a view of plasma heating. Varda Space, a startup that is developing technology for manufacturing in orbit, had cameras on a capsule it landed on Earth on Feb. 21. Before it parachuted to the ground, its Winnebago capsule recorded a day-glow re-entry. The company retrieved the video recording from the capsule and shared it online:<\/p>\n<\/div>\n<\/div>\n