Why It s HARD To Land on Mars

Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics This video is about why it s harder to successfully land spacecraft and landers and rovers on Mars than on Earth, or Venus, or the Moon, or Titan, or asteroids. It all comes down to atmospheric density! When there s no atmosphere, you can do a powered descent in a flimsy tinfoil spacecraft like the Lunar Module, and when there s plenty of atmosphere you can do an unpowered descent via heat shield and parachutes like the space shuttle, Apollo command module, Soyuz, Huygens, etc. But on Mars with its thin air, you have to do both powered & unpowered descent, getting the worst of both worlds. Thanks to Hoppy Price from JPL for fact-checking this video! Link to Patreon Supporters: http://www.minutephysics.com/supporters/ REFERENCES Spreadsheet to calculate landing success rates: https://docs.google.com/spreadsheets/d/1jqeZCG56UBKvd\_wsyW3GD-qd9TAsaW1RPAiZ-1BCUaE/edit?usp=sharing NASA Low Density Supersonic Decelerator Fact Sheets: https://www.nasa.gov/pdf/737628main\_Final\_LDSD\_Fact\_Sheet\_3-26-13.pdf https://www.jpl.nasa.gov/news/press\_kits/ldsd.pdf LDSD Test Footage: https://www.nasa.gov/mission\_pages/tdm/ldsd/videos.html More LDSD Test Footage:https://www.youtube.com/watch?v=lJzeeYoLn50 List of Missions to Mars: https://en.wikipedia.org/wiki/List\_of\_missions\_to\_Mars List of Missions to the Moon: https://en.wikipedia.org/wiki/List\_of\_missions\_to\_the\_Moon List of Missions to Saturn: https://en.wikipedia.org/wiki/Exploration\_of\_Saturn List of Missions to Venus: https://en.wikipedia.org/wiki/List\_of\_missions\_to\_Venus Curiosity Rover Landing Overview: https://mars.nasa.gov/msl/mission/technology/insituexploration/edl/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich