The Advanced Composition Explorer (ACE) is an Explorer mission that studies particles arriving from the Sun, interstellar, and galactic sources to contribute to our understanding of the formation and evolution of the solar system as well as the astrophysical processes involved.
The SeaWinds instruments are designed to acquire accurate, high-resolution, continuous, all-weather measurements of global (land, ice, and ocean) radar cross-section and near-surface vector winds over the ice-free global oceans.
The AIM satellite mission is designed to explore Polar Mesospheric Clouds (PMCs), also called noctilucent clouds, to find out why they form and why they are changing.
Aqua, Latin for "water," is named for the large amount of information it is designed to collect about Earth's water cycle, including evaporation from the oceans, water vapor in the air, clouds, precipitation, soil moisture, ice, and more.
Aquarius is a focused satellite mission to measure sea surface salinity (salt levels).
Astro-E2/Suzaku is a satellite for studying X-rays emitted by stars, galaxies, and black holes.
Aura, Latin for "breeze," is designed to investigate questions about ozone trends, air quality changes and their ties to climate change.
The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation mission provides insight into the role that clouds and atmospheric aerosols play in regulating Earth's weather, climate, and air quality. CALIPSO is a joint mission between NASA and CNES, the French space agency.
NASA is collaborating with the Air Force on CINDI. The satellite is designed to study the elements that influence space weather near Earth's equator.
CloudSat provides observations that advance our understanding of cloud abundance, distribution, structure, and radiative properties.
Earth Observing-1 (EO-1) was the first satellite in NASA's New Millennium Program Earth Observing series. The EO-1 mission developed techniques for space-based Earth observations.
Formerly known as GLAST, the Fermi Gamma-ray Space Telescope gives astronomers a superior tool to study how black holes, notorious for pulling matter in, can accelerate jets of gas outward at fantastic speeds.
The Galaxy Evolution Explorer will observe hundreds of thousands of nearby and distant galaxies in ultraviolet (UV) light. Additionally, GALEX will view the stars in our own galaxy, the Milky Way.
This international satellite mission will set a new standard for precipitation measurements from space, providing observations of rain and snow worldwide every three hours. The GPM mission data will advance our understanding of the water and energy cycles and extend the use of precipitation data to directly benefit society.
The GOES I-M satellites are the primary element of U.S. weather monitoring and forecast operations and is a key component of NOAA's National Weather Service operations and modernization program.
GOES provide a constant vigil for the atmospheric "triggers" of severe weather conditions, such as tornadoes, flash floods, hail storms and hurricanes.
GOES satellites provide the familiar weather pictures seen on U.S. television newscasts every day.
The primary goal of the GRACE mission is to accurately map variations in the Earth's gravity field over its 5-year lifetime.
Hinode (formerly Solar-B) studies the interaction between the sun's magnetic field and high-temperature, ionized atmosphere.
Goddard is responsible for HST project management, including mission and science operations, servicing missions, and all associated development activities. Hubble celebrates its 20th anniversary in orbit this April.
The IBEX mission will study the global interaction between the solar wind and the interstellar medium.
Are the ice sheets that still blanket Earth's poles growing or shrinking? ICESat was designed to help answer this question.
ESA's International Gamma-Ray Astrophysics Laboratory is detecting some of the most energetic radiation that comes from space. INTEGRAL is an ESA mission in cooperation with Russia and the United States.
The LAGEOS satellites are designed to provide an orbiting benchmark for geodynamical studies of Earth. LAGEOS-1 was launched by Italy in 1976.
A satellite used to acquire images of the Earth's land surface and surrounding coastal regions.
The Lunar Reconnaissance Orbiter is an unmanned mission to create the comprehensive atlas of the moon's features and resources necessary to design and build a lunar outpost. LRO focuses on the selection of safe landing sites, identification of lunar resources and the study of how lunar radiation will affect humans.
MESSENGER will help us answer key questions about Mercury.
NASA's New Horizons spacecraft will be the first spacecraft to visit Pluto and its moon Charon.
NOAA-N is the fourth in the series of support dedicated microwave instruments for the generation of temperature, moisture, surface and hydrological products in cloudy regions where visible and infrared (IR) instruments have decreased capability.
NuSTAR is now in orbit, taking focused images of the high-energy X-ray sky.
Operation Ice Bridge, a six-year NASA field campaign, is the largest airborne survey of Earth's polar ice ever flown and serves as a bridge between retiring satellite mission ICESat and its replacement ICESat-II scheduled for launch in 2015.
The Radiation Belt Storm Probes Mission will provide unprecedented insight into the physical dynamics of the radiation belts and give scientists the data they need to make predictions of changes in this critical region of space.
The primary scientific objective of RHESSI is to study the processes that take place in the solar atmosphere during a flare.
The Rossi X-ray Timing Explorer (RXTE) is a satellite that observes the fast-moving, high-energy worlds of black holes, neutron stars, X-ray pulsars and bursts of X-rays that light up the sky and then disappear forever.
The Solar Dynamics Observatory will further our understanding of the sun's influence on Earth and near-Earth space by studying the solar atmosphere on small scales of space and time, and in many wavelengths simultaneously.
The Solar and Heliophysic Observatory was designed to study the internal structure of the sun, its extensive outer atmosphere and the origin of the solar wind.
SORCE is a NASA-sponsored satellite mission that is designed to provide state-of-the-art measurements of incoming X-ray, ultraviolet, visible, near-infrared, and total solar radiation.
The STEREO mission traces the flow of energy and matter from the sun to Earth with two identically equipped spacecraft to provide revolutionary 3-D imaging of coronal mass ejections (CMEs).
The Suomi National Polar-orbiting Partnership (Suomi NPP) mission represents a critical first step in building the next-generation Earth-observing satellite system that will collect data on both long-term climate change and short-term weather conditions.
The Swift mission is dedicated to the study of gamma-ray bursts.
The Tracking and Data Relay Satellite System consists of a constellation of geosynchronous satellites and associated ground systems that operate as a bent-pipe relay system between customer platforms and customer ground facilities. Future TDRS satellites will help replenish the fleet.
Terra (formerly EOS AM-1) is the flagship satellite of NASA's Earth observing systems. Terra provides global data on land, oceans and the atmosphere, as well as their interactions with solar radiation and with one another.
The THEMIS satellites help scientists answer questions about changes in aurorae, commonly called the Northern Lights or the Southern Lights, depending on their location.
TIMED studies the region of Earth's atmosphere between 60 kilometers and 180 kilometers up. This region, called the Mesosphere and Lower Thermosphere/Ionosphere (MLTI), is the least understood and explored part of our atmosphere.
The Transition Region and Coronal Explorer (TRACE) explores the three-dimensional magnetic structures of the sun's photosphere. It also examines both the geometry and dynamics of the upper solar atmosphere, called the transition region and corona.
TRMM is particularly devoted to examining rainfall in Earth's tropical and subtropical regions. The rainfall in these regions makes up about two-thirds of Earth's total. It is partly responsible for driving our weather and climate system.
The Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) mission provides a new capability for stereoscopically imaging the magnetosphere.
Wind was the first of two NASA spacecraft in the Global Geospace Science initiative and part of the ISTP Project. The science objectives of the WIND mission are to provide complete plasma, energetic particle, and magnetic field input for magnetospheric and ionospheric studies.
The Wilkinson Microwave Anisotropy Probe mission is designed to determine the geometry, content and evolution of the universe.
The XMM-Newton mission will help scientists solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the universe itself.