- Echo Sounders
- echo sounders
- Echo sounders
- Devices that use sound waves to measure the depth of surface water bodies.
- ecosystems
- ecosystem
- Ecosystem
- Ecosystems
- the complex of a community of organisms and its environment functioning as an ecological unit
- EDL
- Entry, Descent and Landing
- El Nino
- Warm-water conditions off the western tropical coasts of the Americas, occurring irregularly but usually around Christmastime, caused by weakening trade winds and causing depleted fisheries, heavier-than-normal rain in the central and eastern Pacific, and drought in the western Pacific.
- emissions
- emission
- Emission
- Emissions
- The production of light, or more generally, electromagnetic radiation by an atom or other object.
- EOS
- Earth Observing System
- EOSDIS
- EOS Data and Information System
- EPA
- Environmental Protection Agency
- Ephemeris
- ephermeris
- An ephemeris is a tabulation of computed positions and velocities (and/or various derived quantities such as right ascension and declination) of an orbiting body at specific times. The plural form of ephemeris is ephemerides. In the context of this web-site, solar system bodies are implied.
- EPO
- E/PO
- Education and Public Outreach
Education and Public Outreach. See Opportunities in Science Mission Directorate Education and Public Outreach.
- equilibrium
the state where conditions in a fluid are uniform or changing only slowly
- ESA
- European Space Agency
- ESIP
- Federation of Earth Science Information Partners
- ESMD
- Exploration Systems Mission Directorate
- ESSP
- Earth System Science Pathfinder
- ESTO
- Earth Science Technology Office
From instruments to data access, the NASA Earth Science Technology Office (ESTO) develops technologies that enable a full range of scientific measurements, operational requirements, and practical applications that benefit society at large.
- extra solar planets
- Extra solar planets
- Planets around stars other than the Sun.