LAMBDA

LAMBDA (Legacy Archive for Microwave Background Data Analysis) is a NASA service/archive center with data relating to the cosmic microwave background.

Another occurrence of the acronym LAMBDA in astrophysics is the Leiden Atomic and Molecular Database (LAMBDA) of spectroscopic information.

Naturally, the Greek letter, lambda (λ and Λ) is used widely in sciences. Some astronomy usage:

• cosmological constant (Λ) and dark energy (Λ)
• eigenvalue (λ)
• Jeans parameter (λ)
• wavelength (λ)
• tidal deformability (Λ)