E
- E – (celestial object) Eclipsing, a binary star system with variable brightness in which the stars eclipse each other
- EA – (celestial object) Eclipsing Algol, a class of eclipsing binary stars named after Algol, the archetype for the class
- EB – (celestial object) Eclipsing Beta Lyrae, a class of eclipsing binary stars named after Beta Lyrae, the archetype for the class
- EW – (celestial object) Eclipsing W Ursa Majoris, a class of eclipsing binary stars named after W Ursa Majoris, the archetype for the class
- EAAE – (organization) European Association for Astronomy Education
- E-ELT – (telescope) – European Extremely Large Telescope
- EAPSNET – (organization) – East-Asian Planet Search Network
- EC – (celestial object) Embedded Cluster, a star cluster that is partially or fully embedded in interstellar gas or dust
- ECA – (celestial object) Earth Crossing Asteroid
- EGG – (celestial object) Evaporating Gaseous Globule
- EGGR – (catalog) Eggen & Greenstein, a catalog of mostly white dwarfs
- EGP – (celestial object) Extrasolar Giant Planet
- EGRET – (telescope) Energetic Gamma Ray Experiment Telescope, another name for the Compton Gamma Ray Observatory
- EHB – (celestial object) Extreme Horizontal Branch, a type of hot, evolved star
- EJASA – (publication) Electronic Journal of the Astronomical Society of the Atlantic
- EKBO – (celestial object) Edgeworth-Kuiper Belt Object, an alternative name for Kuiper Belt Objects
- ELIAS – (observing program) European Large Area ISO Survey, a survey of high redshift galaxies performed with the Infrared Space Observatory (ISO)
- ELT – (telescope) Extremely Large Telescope
- EMP – (catalog) Ephemerides of Minor Planets
- EMP – (celestial object) Extremely Metal-Poor, a star with few elements other than hydrogen and helium
- ENACS – (observing program) ESO Nearby Abell Cluster Survey, a survey of galaxy clusters
- ERO – (celestial object) Extremely Red Object, a name applied to galaxies with red spectra
- ESA – (organization) European Space Agency
- ESO – (organization) European Southern Observatory
- ESTEC – (organization) European Space research and TEchnology Centre
- ESTRACK – (communications network) European Space TRACKing, a network of radio antennas used for communicating to spacecraft
- EUV – (astrophysics terminology) Extreme UltraViolet
- EUVE – (telescope) Extreme UltraViolet Explorer, an ultraviolet space telescope
- EVN – (organization) European VLBI Network
Read more about this topic: List Of Astronomy Acronyms