Sun, moon photobomb NASA moon rocket during Artemis 1 rollout (photos)
, throughout the solar system. At times, solar explosions called coronal mass ejections push huge quantities of particles into space, threatening space infrastructure and, potentially, the health of astronauts.that surround our planet. But NASA wants to learn more about the potential effects of radiation upon spaceflyers who travel to the moon and other destinations beyond the Van Allen Belts. program landed six crewed missions on the moon from 1969 to 1972.
But those were all short-duration flights, and the agency is interested in building up a long-term presence on and around the moon and getting astronauts to Mars as well. A significant part of the Artemis 1 mission will consist of playing with gravity. At first the SLS must go into space against Earth's gravity, of course. Later in the launch sequence, a trans-lunar injection by the rocket's upper stage will boost the Orion spacecraft toward the moon.
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