sls

SLS is an acronym with several notable meanings. The most widely referenced are the Space Launch System, Sodium Lauryl Sulfate, and Selective Laser Sintering.

The Space Launch System is NASA’s heavy-lift launcher for deep-space missions. In its initial configuration, Block 1 uses a core stage with two main engines, flanked by two five-segment solid rocket boosters, and an upper stage for trans-lunar injection. The design leverages Shuttle heritage propulsion while delivering far greater lift than earlier rockets. Artemis program missions aim to build toward larger configurations like Block 1B and beyond to enable crewed and cargo missions to cis-lunar space and beyond.

Sodium lauryl sulfate is an anionic surfactant used for foaming and cleansing in many personal care and household products. It is typically derived from coconut or palm kernel oils and is often found in shampoos, toothpastes, and detergents. SLS lowers surface tension to aid cleaning but can irritate skin or eyes in some individuals at higher concentrations; formulations commonly limit exposure and may substitute milder surfactants such as SLES.

Selective Laser Sintering is a 3D printing process that fuses powdered polymers, typically nylon, with a laser to build parts layer by layer. The surrounding powder supports overhangs, reducing the need for dedicated fixtures. SLS yields strong, dimensionally stable parts suitable for prototyping and end-use components, with materials including PA12 and PA11 and various reinforced grades. Post-processing involves depowdering, cleaning, and sometimes heat treatment.