The Space Launch System (SLS) is an American super heavy-lift expendable launch vehicle used by NASA. As the primary launch vehicle of the Artemis Moon landing program, SLS is designed to launch the crewed See more

Construction
As of 2020 , three SLS versions are planned: Block 1, Block 1B, and Block 2. Each will use the … See more

• Spaceflight portal
• Austere Human Missions to Mars
• Comparison of orbital launch systems
• DIRECT, proposals prior to SLS
• Shuttle-Derived Heavy Lift Launch Vehicle, a 2009 concept launch vehicle See more

Funding
During the joint Senate-NASA presentation in September 2011, it was stated that the SLS program had a projected development cost of US$18 billion through 2017, with $10 billion for the SLS rocket, $6 … See more

NASA has been reluctant to provide an official per-flight cost estimate for the SLS. However, independent agencies, such as the See more

The SLS has been criticized based on program cost, lack of commercial involvement, and non-competitiveness of legislation requiring … See more

• Space Launch System and Multi-Purpose Crew Vehicle page on NASA.gov Archived 27 April 2011 at the Wayback Machine
• "Preliminary Report on Multi-Purpose Crew Vehicle and Space Launch System" (PDF), NASA See more