NASA’s Guide To The Steps Taken During The 48-Hour Countdown For Artemis 1
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NASA’s Guide To The Steps Taken During The 48-Hour Countdown For Artemis 1

NASA’s Guide To The Steps Taken During The 48-Hour Countdown For Artemis 1

NASA provides a step-by_step guide to the 48-hour countdown to launch the Artemis 1 mission towards the Moon. In 1972, NASA launched its last rocket to the Moon. NASA used the famous Saturn V rocket in 1972 to establish the Apollo missions and land U.S. astronauts on the Moon. NASA constructed the massive SLS rocket (212 feet high) as part of its return. It is the tallest and strongest rocket in the world.

NASA has searched for it since the Moon was discovered 50 years ago. The Artemis 1 mission will launch in June, the first in a series. The task is to test the SLS (Space Launch System). Uncrewed, the Orion spacecraft will be tested as well. It will orbit the Moon and return safely to Earth.

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NASA has revealed the steps to the two-day countdown for the Artemis 1 rocket launch. The wet dress rehearsal is held at Kennedy Space Center. This includes all steps necessary to ignite the booster. Countdowns include milestones such as “L Minim,” which indicates the time it takes for liftoff to occur in hours, and “M Minus,” which shows the sequence of events that will take place during the countdown. To target a specific launch window or accommodate tasks without affecting the schedule for the Artemis mission, the complex launch countdown also includes holds.


Once the NASA team arrives at their stations, the countdown begins. Forty-five hours before launch, the water tank for the sound suppression system will be filled. The water system protects the spacecraft from damage caused by violent sound oscillations. The Orion spacecraft will launch at minus 40 hours. After that, final preparations for the rocket’s RS-25 engines will begin a little more than nine hours later. The Orion crew module hatch closes, and the crew arm retracts.

All non-essential personnel must leave the launch site 12 hours before launch. The launch teams undergo a “go” or “not-go” test to determine if they are ready to fuel the rocket. The core stage liquid oxygen has been chilled, and the slow and fast rocket fuel filling stages have begun 7 hours before launch. NASA activates Orion’s communications systems within 4 hours and 20 mins and then begins validation and leak testing.

The director announces a “go” and “not go” when the countdown to launch reaches 15 minutes. The rocket stages are now powered by internal power, and Orion’s main ascents instruments have been armed. After 33 seconds, the automated launch sequence activates. At T-12 seconds, the hydrogen burn-off igniters start, and the core stage engine begins. Six seconds later, the RS-25 engines begstart fire. The boosters ignite, the ground shakes, the umbilical separates, and NASA’s rocket finally liftoffs towards the Moon.


NASA’s Guide To The Steps Taken During The 48-Hour Countdown For Artemis 1
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