APL

(computer language): From the book A Programming Language (1962).

(astronomy, NASA, physics) Initialism of Applied Physics Laboratory (a Johns Hopkins University laboratory)


MEP

Mars Exploration Program
w:Mars Exploration Program

(astronomy, NASA, US) Initialism of Mars Exploration Program.


Artemis

From Ancient Greek Ἄρτεμις (Ártemis). Further etymology is uncertain.

(NASA, space science) A United States space program, and the associated vehicles, used for human travel to the moon in the 2020s.


Apollo

From Latin Apollō, from Ancient Greek Ἀπόλλων (Apóllōn).

Apollo 11 landed people on the moon for the first time.

(NASA, space science) A United States space program, and the vehicles it created, used for human travel to the moon.


MRO

(NASA, space science, US) Initialism of Mars Reconnaissance Orbiter.


SAM

Sample Analysis at Mars
w:Sample Analysis at Mars

Mars Science Laboratory
w:Mars Science Laboratory

(space science, NASA) Acronym of Sample Analysis at Mars. (a scientific instrument of the Mars Science Laboratory on board the Curiosity rover on Mars.)


COTS

(NASA, space science) Acronym of Commercial Orbital Transportation Services (program for delivery to the International Space Station by private companies)


HST

Hubble Space Telescope
w:Hubble Space Telescope

(space science, US, NASA) Initialism of Hubble Space Telescope.


DSN

(space science, NASA) Initialism of Deep Space Network.


CRS

Commercial Resupply Services
w:Commercial Resupply Services

(astronautics, NASA) Initialism of Commercial Resupply Services.


AIM

Aeronomy of Ice in the Mesosphere
w:Aeronomy of Ice in the Mesosphere

(NASA, space science) Initialism of Aeronomy of Ice in the Mesosphere, a NASA satellite.


DAN

Dynamic Albedo of Neutrons
w:Dynamic Albedo of Neutrons

(space science, NASA) Acronym of Dynamic Albedo of Neutrons. (It is a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)


RAD

(NASA, space science) Initialism of Radiation Assessment Detector (a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)


MSR

Mars Sample Return mission
w:Mars sample return mission

(space science, US, NASA) Initialism of Mars Sample Return mission.


RMI

Remote Micro Imager
w:Curiosity (rover)#Instruments

(space science, NASA) Abbreviation of Remote Micro Imager.


SST

Spitzer Space Telescope
w:Spitzer Space Telescope

(space science, US, NASA) Initialism of Spitzer Space Telescope.


NGST

New Generation Space Telescope
w:Next Generation Space Telescope

(space science, US, NASA) Initialism of New Generation Space Telescope.


JWST

(NASA, space science, US) Initialism of James Webb Space Telescope.


GRAIL

w:Gravity Recovery and Interior Laboratory

(space science, NASA) Initialism of Gravity Recovery and Interior Laboratory.


MSL

(space science, US, NASA) Initialism of Mars Science Laboratory.


MER

Mars Exploration Rover
w:Mars Exploration Rover

(space science, US, NASA) Initialism of Mars Exploration Rover.


MAHLI

Mars Hand Lens Imager
w:Mars Hand Lens Imager

(space science, NASA) Initialism of Mars Hand Lens Imager (a scientific instrument of the Mars Science Laboratory on board the Curiosity rover on Mars.)


MARDI

Mars Descent Imager
w:Mars Descent Imager

(space science, NASA) Abbreviation of Mars Descent Imager. (a scientific instrument of the Mars Science Laboratory aboard the Curiosity rover on Mars)


REMS

w:Rover Environmental Monitoring Station

(space science, NASA) Acronym of Rover Environmental Monitoring Station.


APXS

Alpha-particle X-ray spectrometer
w:Alpha particle X-ray spectrometer

(space science, NASA) Initialism of Alpha-particle X-ray spectrometer. (It is a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)


HiRISE

Mars Reconnaissance Orbiter
w:Mars Reconnaissance Orbiter

(space science, NASA) Initialism of High Resolution Imaging Science Experiment. (a camera on board the Mars Reconnaissance Orbiter.)


MEDLI

Mars Science Laboratory entry vehicle
w:Mars Science Laboratory

(space science, NASA) Initialism of MSL Entry, Descent, and Landing Instrumentation. (A suite of engineering sensors in the Mars Science Laboratory entry vehicle heat shield involved in the landing of the Curiosity rover on Mars.)


RVSP

(space science, NASA) Initialism of Rover Sequencing and Visualization Program. (a tool that helps engineers plan the Curiosity rover's drives, modeling pebbles and bumps in the terrain)


ChemCam

(space science, NASA) Abbreviation of Chemistry and Camera. (an instrument onboard the Curiosity rover.)


SPURS

(oceanography, NASA) Acronym of Salinity Processes in the Upper Ocean Regional Study.


(aeronautics, NASA, meteorology) Initialism of Hurricane and Severe Storm Sentinel. (A project launched in August 2012 to observer hurricanes)


SOFIA

w:Stratospheric Observatory for Infrared Astronomy

(space science, telescope, NASA) Acronym of Stratospheric Observatory for Infrared Astronomy. (a telescope atop a Boeing 747SP aircraft with an effective diameter of 2.5 meters at altitudes up to 13.7 kilometers)


MMOD

(space science, NASA) Initialism of micrometeoroid and orbital debris.


GROVER

(robotics, NASA) Acronym of Greenland rover and Goddard remotely operated vehicle for exploration and research.


CheMin

(space science, NASA) Abbreviation of Chemistry and Mineralogy. (It is an instrument onboard the Curiosity rover at Mars.)


Navcam

space rovers
w:rover (space exploration)

(space science, NASA) Abbreviation of navigation camera. (a type of engineering camera found on certain unmanned space rovers including the Curiosity rover on Mars.)


Hazcam

(space science, NASA) Abbreviation of Hazard avoidance camera. (It is a type of engineering camera mounted on the front and rear of certain unmanned space rovers including the Curiosity rover at Mars.)


MastCam

(space science, NASA) Abbreviation of Mast camera. (It is a type of camera found on certain unmanned space rovers including the Curiosity rover at Mars.)


CIBER

(space science, NASA) Initialism of Cosmic Infrared Background Experiment.


MGS

Mars Global Surveyor
w:Mars Global Surveyor

(space science, US, NASA) Initialism of Mars Global Surveyor.


SIRTF

Space Infrared Telescope Facility
w:Spitzer Space Telescope

(space science, US, NASA) Initialism of Space Infrared Telescope Facility.


MAVEN

(NASA, space science) Initialism of Mars Atmosphere and Volatile Evolution Mission (a space probe designed to investigate the Martian climate)


AIDA

(ESA, NASA, space science) Initialism of Asteroid Impact & Deflection Mission.


LDSD

(NASA, space science) Initialism of Low-Density Supersonic Decelerator (a reentry vehicle designed to test techniques for atmospheric entry on Mars)


NextSTEP

(NASA, space science) Name for a set of projects that aim to develop technology for human spaceflight in deep space exploration.


SSED

(NASA, space science) Initialism of Solar System Exploration Division (a division at NASA)


SMPG

(NASA, space science) Initialism of Small Mission Program Group (a division for missions with a small budget at NASA)


ISEE

(NASA, space science) Abbreviation of International Sun Earth Explorer (later renamed to International Cometary Explorer ICE)


MTF

Mississippi Test Facility
w:Mississippi Test Facility

(astronautics, NASA, historical) Initialism of Mississippi Test Facility.


RPS

(NASA, nuclear power, space science) Initialism of Radioisotope Power System.


IRAS

(astronomy, NASA) Initialism of Infrared Astronomical Satellite (the first space telescope to perform a survey of the entire night sky at infrared wavelengths.)


OSIRIS-REx

(astronomy, NASA) Initialism of Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (a NASA asteroid-study and sample-return mission)


AEGIS

w:Autonomous Exploration for Gathering Increased Science

(NASA) Acronym of Autonomous Exploration for Gathering Increased Science.