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Loose apronyms:
Perfect Apronyms OnlyAll Apronyms
100% ALDEBARANAcross Lightyear Distances, Earthbound Beams Are Received At Night Tony McCoy O'Grady. (Taurus, the Bull, is a zodiacal constellation that contains the orange-hued star Aldebaran, the 13th brightest star in the sky and 45 times larger than the Sun.)
89% BESSEL AND NEPTUNEBessel's Equations Struggled to Show Existence, Leverrier & Adams' Numbercrunching Deduced New Edge-lying Planet's Tenor. Undisputed, Now - Elementary! Angela Brett
100% BLAST OFFBurn Loads And Surge Through Our Fragile Firmament Tony McCoy O'Grady
91% CHALLENGERChrista Had A Life; Lost in Explosion. National Grief Eternally Remains. Roger Williams
86% COMETSComing Occasionally, Making Eveningtime Trails (in) Sky Tony McCoy O'Grady
100% EUROPEAN SPACE AGENCYExalted University Researchers Orgainsed Project Emulating American (NASA) Space Programme - Albeit Cannot Expend Asmuch Gelt Each New Calendar Year Tony McCoy O'Grady
100% FOCUSFor Orbits, Centre's Usually Star Angela Brett
75% GALAXYGigantic Area. Long Armed X-axis & Y-axis Tony McCoy O'Grady
100% IAIts Astronomical Rico Leffanta (Ia is Hawaiian for Milky Way)
95% LIFE ON OTHER PLANETSLife Is Feasible Exterior to Our Norms, Over The Heavens Expanse Reside "Peoples" Lacking Anthropoidal Natures, Eating Toxic Substances Bones McCoy O'Grady
100% METALMost Elements That Aren't Light Angela Brett (astronomers call any elements heavier than helium 'metals'.)
100% METEORSMoving Endlessly They Encircle Our Rotating Sphere Tony McCoy O'Grady
100% MISQUOTEMost Idiots Seldom Question Understanding Of The Eclipse Rico Leffanta
100% MOONMonthly Orbiter Of Nighttime Tony McCoy O'Grady
100% MOON (2)Makes One Odify Nighttime Roger Williams
100% MOON (3)Most Often Observed Nightly. Roger Williams
80% NASANewbies: "Acronym [for] Space Agency" Jeff Anonymous
Re-expansions of existing acronyms
100% NASA (2)Never Attended Starfleet Academy Tony McCoy O'Grady
Re-expansions of existing acronyms
67% NASA (3)Never Attained Speed-of-light Acceleration Tony McCoy O'Grady
Re-expansions of existing acronyms
100% NASA (4)Not Another Shuttle Accident! Angela Brett, after the space shuttle Columbia broke up in re-entry.
People & Relationships:Disaster
100% NORTHERN LIGHTNightly Observance, Rays Tints Have Each Ring Naturally Living In Great Hues. Tremendous Jan Morgan
100% ORIONOften Resplendent In Our Nightsky Tony McCoy O'Grady
100% PATHETICPeople Against The Hypothesis Earth Travels In Circles Rico Leffanta
Assorted Adjectives
100% PERSEIDSParticles Entering Remote Stratosphere Emit Illuminations During Summertime. Tony McCoy O'Grady
100% PLASMAPyrolysis Looms As Spacecraft Meets Atmosphere Angela Brett, who hopes that the term 'pyrolysis' can apply to the separation of atoms into ions and electrons in plasma.
100% POLE STARPeople Oriented Looking Ever Skyward. The Astrolabe Resulted Tony McCoy O'Grady
100% PULSARSProbably Unpopulated Locations, Some Are Remotely Studied. Tony McCoy O'Grady
86% QUASARQuite Unusually Active Sources At Radio-wavelengths Philip Edwards
100% QUASARSQueer Unusual And Strange Areas - Radiation Sources Tony McCoy O'Grady
100% ROCKETRoaring Off, Carrying Keen Extra Terrestrials Patricia Rix
100% ROCKETSReach Orbit Converting Kinetic Energy, Transporting Satellites Philip Edwards
100% SATELLITESat A 'Tall Electric Lamp' = Light! It Truly Enlightened! Charles H. Montgomery, Jr. Saw 'SATELLITE' thought 'Sat A Light.'
Words & Wordplay
100% SETISpread Ears Toward Infinity Angela Brett (SETI usually stands for the Search for Extra-Terrestrial Intelligence)
Re-expansions of existing acronyms
100% SETI (2)Some Expect Tiny Irishmen Angela Brett, referring to 'little green men' (see SETI)
Re-expansions of existing acronyms
100% SETI (3)Spacemen Everywhere Tune In Angela Brett (see SETI)
Re-expansions of existing acronyms
100% SETI (4)Sentience: Earthbound? The Investigation Angela Brett (see SETI)
Re-expansions of existing acronyms
100% SETI (5)Seek E. T's Integers Tony McCoy O'Grady (see SETI)
Re-expansions of existing acronyms
100% SETI AT HOMESupercomputers Everywhere Try Isolating Alien Technology's Hallmark - Obfuscated Mathematical Equations? Angela Brett
100% SETI AT HOME (2)Sift, Eventually, Total 'Interference' Among The Heavens Over Mother Earth Tony McCoy O'Grady
100% SHUTTLESpacemen Have Used This To Leave Earth Angela Brett
100% SIDEREALStarlight Inspires Desires Enchanting Romantics, Especially After Libations Rico Leffanta
People & Relationships:Love & Lust
100% SOLSource Of Light Tony McCoy O'Grady
100% SOUND IN SPACESign Of Uneducated Nitwits... Doesn't It Need Some Perturbed Atoms, Compressing & Expanding? Angela Brett, when Jeff gave sound in space as the reason for calling STAR WARS FOUR Un Realistic.
100% SPACEScientists Puzzled About Curvature, Etc. Angela Brett
89% SPACE AGEShuttle Pilotted by Aging Chap - Everybody Admires Great Explorers. Angela Brett
100% STARSomething That Astronomers Research Angela Brett
100% STARSShining Things Are Radiation Sources Tony McCoy O'Grady
100% STARS (2)Still Twinkling After Repeated Seasons Roger Williams
75% SUNSource of Uncountable Neutrons Tony McCoy O'Grady
100% SUN (2)Star, Usefully Nearby Philip Edwards
100% SUN (3)Solar Unit Nearby. Roger Williams
100% SUNRISESun's Up Now, Resulting In Sleep Ending. Roger Williams
Sports & Recreation:Relaxation
100% SUNSETSun Unseen Now Signifying Evening Time. Roger Williams
100% SUNSET (2)Sun's Unseen Now, Since Earth's Turning TMcCO'G
90% SUPERNOVAStar Ultimately Perishes Emitting Radiation. Notifying (us) Of Violent Activity Tony McCoy O'Grady
83% TITANTentatively Interior's Terrestrial-ish, Atmosphere's Nitrogen. Angela Brett
100% TIDEThen It Does Ebb. Roger Williams
100% TELESCOPEThis Enhances Longsightedness - Even See Cosmic Objects Parsecs Extrasolar. Angela Brett
100% UMBRAUsually Makes Blacker Region Appear. Angela Brett
100% VACUUM (2)Visit A Cold, Uncaring Universe - Matterless! Angela Brett (it must be uncaring, because in a vacuum, nothing matters.)