Thứ Sáu, 27 tháng 4, 2018

NPR News: NASA Mars Mission Faces Setback After Heat Shield Cracks Under Pressure

NASA Mars Mission Faces Setback After Heat Shield Cracks Under Pressure
The heat shield, made of material that's as light as balsa wood but can withstand temperatures of nearly 4,000 degrees Fahrenheit, broke during testing earlier this month.

Đọc thêm tại NPR
at April 27, 2018 at 09:56PM
Health & Science

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