NASA @NASA
~100x thinner than Earth's, the atmosphere of Mars is too thin to produce enough drag to slow an entering spacecraft. To overcome this, we’re testing an inflatable decelerator here at Earth. It's designed to survive the heat & speeds of a Martian landing: https://t.co/etIUkSGWvn https://t.co/8N9zoqZlwO — PolitiTweet.org