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Lunar Lander Challenge
The Northrop Grumman Lunar Lander Challenge was a competition funded by NASA's Centennial Challenges program. The competition offered a series of prizes for teams that launch a vertical takeoff/vertical landing (VTVL) rocket that achieved the total delta-v needed for a vehicle to move between the surface of the Moon and its orbit. The multi-level competition was conducted by the X PRIZE Foundation, with sponsorship from the Northrop Grumman Corporation who ran the ongoing competition. The prize purses were paid by NASA. It was held annually at the X PRIZE Cup, making its debut at the 2006 Wirefly X PRIZE Cup in October, 2006, until 2009 when the prize purse was awarded to Masten Space Systems and Armadillo Aerospace.
==Competition rules==
The competition is divided into two levels. Both levels require teams to demonstrate control of their vehicle by flying to an altitude of more than , flying laterally for , and landing on a pad. For level 1, this pad is a simple diameter circle; for level 2, it is a simulated lunar surface, complete with craters and boulders. After completing this first flight, the vehicle can then be refueled, and must then fly a second leg back to the original starting point. Each flight must meet a required minimum flight time of 90 seconds for level 1 and 180 seconds for level 2. For each level, the two flights along with any necessary preparation must be accomplished within a short 150-minute time period.〔(- Northrop GrummanLunar Lander Challenge )〕
Each Level offered a first- and second-place prize. Level 1 awarded a first place prize purse of $350,000 and a $150,000 purse for second place. The more difficult level 2 awarded first place prize of $1 million and a $500,000 second place prize.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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