NASA considering budget cuts for Hubble and Chandra space telescopes.
After JWST, Hubble and Chandra are NASA's most expensive astrophysics missions to operate.
Cuts would help offset broader spending reductions in astrophysics programs.
Hubble launched in 1990, Chandra in 1999. Older missions are targets for potential cuts.
Exact budget reduction amounts and specific impacts on telescopes still being studied.
Goal is to maintain funding for other astrophysics priorities if sharp cuts occur.
NASA plans "mini" senior reviews in 2024 to study extending Hubble and Chandra.