EnVision, a project of the European Space Agency (ESA), is a mission to Venus that will perform optical, spectral and radar mapping of Earth’s sister planet. However, before getting down to work the van-sized spacecraft needs to ‘aerobrake’ – lowering its orbit with thousands of passages through the
EnVision, a project of the European Space Agency , is a mission tothat will perform optical, spectral and radar mapping of Earth’s sister planet. However, before getting down to work the van-sized spacecraft needs to ‘aerobrake’ – lowering its orbit with thousands of passages through the planet’s hot, thick atmosphere for up to two years.
Samples of candidate materials for different parts of the EnVision spacecraft were subjected to simulated aerobraking conditions including orbital-velocity atomic oxygen and heat flux using ESA’s LEOX facility. Credit: ESA This particular phenomenon remained unknown during the first decades of the space age. It was only when early Space Shuttle flights returned from low orbit in the early 1980s that engineers received a shock: the spacecraft’s thermal blankets had been severely eroded.
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