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NASA Science Missions

Mission Key

  • Universe
  • Solar System
  • Sun
  • Earth
Operating

Advanced Composition Explorer (ACE) observes particles of solar, interplanetary, interstellar,... View Mission

Past
ACRIMSAT

The purpose of the Active Cavity Radiometer Irradiance Monitor III (ACRIM III) instrument is to... View Mission

Operating
ACT-America

Understanding the terrestrial carbon cycle is essential for diagnosing current and predicting... View Mission

Past
ADEOS Mission Image

Advanced Earth Observing Satellite (ADEOS) was the first international space platform dedicated... View Mission

Future
Illustration of AIDA-DART mission spacecraft

AIDA-DART is a dual-mission concept, involving two independent spacecraft – NASA’s Double... View Mission

Operating

Fifty miles above the ground, Earth's highest clouds form an icy membrane at the edge of the... View Mission

Past

North American ecosystems are critical components of the global carbon cycle, exchanging large... View Mission

Operating

NASA's commitment to studying the Earth as a global system... View Mission

Past

Aquarius is a focused satellite mission to measure global sea surface salinity (SSS). Its... View Mission

Past
Illustration of Artemis mission spacecraft

Measures what happens when the Sun’s radiation hits our rocky moon, where there is no magnetic... View Mission

Past
ASCA Mission Image

ASCA (formerly named Astro-D) was Japan's fourth cosmic X-ray astronomy mission, and the second... View Mission

Future
ASCENDS Mission Image
ASCENDS will provide improved ability to predict/model long-term changes in the climate cycle based... View Mission
Past
Astro 1 Mission Image

The "Astro Observatory" was developed as a system of telescopes that could fly multiple times on... View Mission

Past
ATLAS

ATLAS-1 experiments focused on four scientific disciplines: atmospheric science, solar science,... View Mission

Operating
ATOM

The Atmospheric Tomography Mission (ATom) will study the impact of human-produced air pollution... View Mission