Lunar exploration Historic program
Apollo
Moon
Apollo sent astronauts to the Moon through an integrated architecture of Saturn V, command/service modules, lunar modules, navigation, and mission control.
Why it matters Apollo is the reference case for turning a national goal into a complete engineering and scientific exploration system.
Lunar return Active program
Artemis
Moon
Artemis is NASA's program to return humans to lunar exploration with SLS, Orion, surface systems, and future infrastructure.
Why it matters It connects launch systems, crew spacecraft, lunar operations, science goals, and long-term exploration planning.
Deep-space probe Historic and extended science mission
Voyager
Outer solar system and interstellar space
Voyager spacecraft explored the outer planets and continued outward, turning planetary flybys into a long-duration deep-space science campaign.
Why it matters Voyager shows how trajectory design, instruments, power systems, and communication networks extend human knowledge far beyond Earth.
Orbital observatory Operational observatory
Hubble Space Telescope
Low Earth orbit
Hubble observes the universe above most of Earth's atmosphere, producing deep views of galaxies, nebulae, stars, and cosmic history.
Why it matters It shows how a telescope in orbit can become scientific infrastructure for generations of astronomers.
Space telescope Operational observatory
James Webb Space Telescope
Sun-Earth L2 region
JWST uses infrared instruments and a segmented mirror to study early galaxies, star formation, exoplanets, and cold cosmic structures.
Why it matters It connects observatory design to questions about cosmic origins, planetary atmospheres, and the first luminous structures.
Planetary science Long-running program area
Mars exploration
Mars
NASA Mars missions use orbiters, landers, rovers, and instruments to study geology, climate history, habitability, and planetary change.
Why it matters Mars exploration turns another world into a field laboratory, connecting robotics, instruments, communications, and astrobiology questions.
Human spaceflight and research International orbital research
ISS-related work
Low Earth orbit
NASA supports long-duration human spaceflight, research operations, crew transport coordination, and station science in low Earth orbit.
Why it matters The ISS makes orbit a working laboratory, where life science, materials research, operations, and international cooperation meet.