Space.com article: https://www.space.com/jeff-bezos-blue-origin-artemis-moon-lander-team.html Quote" The U.S. companies Draper, Lockheed Martin and Northrop Grumman will join Blue Origin's bid to build a crewed lunar lander for Artemis, NASA's project to return astronauts to the moon by 2024." That's a team with an impressive pedigree! The article states that he descent stage will use the company's new BE-7 engine which is not surprising. The BE-7 engine uses liquid oxygen and liquid hydrogen to give good performance and offers the long term possibility that these could be sourced from lunar water ice. The article states that the Ascent stage will be made by Lockheed Martin but doesn't give details of the engine proposed to be used. It's interesting to note that on the Apollo lunar module both the descent and ascent engines used hypergolic propellants i.e the two components spontaneously ignite when they come into contact with each other, so are easy to ignite reliably and repeatedly. Whilst it's not such a great problem if the descent engine won't fire up from lunar orbit to initiate a descent onto the Moon's surface it most certainly is if once you're on the Moon's surface you are ready to depart and the ascent engine won't start, so I wonder if the hypergolic propellants engine design will be retained for the ascent stage?