Landers need heat shields during reentry

The Huygens Probe will enter the upper layers of Titan's atmosphere at 22000 km/h, slowing to about 1400 km/h in less than 2 minutes, thanks to the friction of the Front Shield with the atmospheric gas. The temperature of the gas in the shock wave in front of the heat shield may reach 120000 °C, with the shield itself reaching 18000 °C.