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Loading contentA NASA mission at the Sun–Earth L1 point that measures the solar wind and energetic particles upstream of Earth, giving roughly an hour of warning before disturbances reach the planet.
space_mission:aceDataset membership
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How ACE (Advanced Composition Explorer) connects across Asteria Star — scientific, cultural, and astrological links are kept separate.
The continuous stream of charged particles — mostly protons and electrons — that flows outward from the Sun's corona at hundreds of kilometres per second, filling the Solar System and shaping planetary magnetospheres.
Bursts of high-energy particles accelerated by solar flares and coronal mass ejections. Unlike the steady galactic cosmic rays, SEP events are sudden and can deliver a dangerous radiation dose to astronauts within hours.
ESA's Asteroid Impact Mission — the original European orbiter half of the AIDA collaboration, meant to observe the DART impact in real time. It was not funded in 2016, but its science was largely revived and reshaped as the Hera mission.
Apollo 11 was the NASA mission that in July 1969 first landed humans on the Moon, with Neil Armstrong and Buzz Aldrin walking on the lunar surface.
Apollo 13's planned lunar landing was aborted after an oxygen-tank explosion; the crew returned safely in a celebrated rescue.
Apollo 17 was the final crewed Apollo lunar landing, carrying the first scientist-astronaut to the Moon.
Apollo 8 was the first crewed mission to leave Earth orbit and orbit the Moon, returning the famous 'Earthrise' photograph.
Artemis I was the uncrewed first flight of the SLS rocket and Orion spacecraft on a path around the Moon.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.