Artist’s conception of an SLS launch.
Artist’s conception of an SLS launch.

NASA is almost ready to send an uncrewed capsule on a 25-day journey to the Moon and back, but this plan involves a lot of moving parts, including a harrowing 5,000 degree reentry through Earth's atmosphere. As NASA officially begins the Artemis era, here is what you can expect from Artemis 1.

When will NASA’s SLS launch?

There is a two hour launch window that opens at 1:04 a.m. There is an hour and a half later. The Artemis 1 launch is currently predicted to have a 90 percent chance of success. If SLS can't fly on Wednesday morning, NASA has backup opportunities.

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On Friday, November 4, NASA rolled its Space Launch System rocket back to Launch Pad 39B at Kennedy Space Center in Florida, but Tropical Storm Nicole forced a delay of two days. The space agency is looking into the damage that was caused by the storm, as the rocket that flew into the sky was hit by high winds.

NASA is pushing farther into deep space.

The mission will require the uncrewed capsule to travel a total distance of over one million miles and take 25 days to reach the moon. After hanging out for a few weeks on the moon, it will be time to come home. It is expected that a splashdown in the Pacific Ocean will take place on December 11. It will have to endure temperatures of 5,000 degrees Fahrenheit (2,760 degrees Celsius) as it is expected to hit the atmosphere at a rate of 25,000 miles per hour.

What’s the purpose of the Artemis 1 mission?

There is a test mission. It will be the first integrated trial of SLS and Orion, the latter of which was sent to space on a trial mission in 2004. This will be SLS's first launch.

Artemis 1 is a mission that will do what hasn't been done and learn what isn't known. It will push the edges of the envelope to prepare for the next flight.

Artemis 2 is a mission in which a crewed capsule will try to do the same thing. NASA will attempt to land a man and woman on the moon with the help of the two Artemis missions. Artemis 2 and Artemis 3 could happen in the same year, but more realistic in the next decade.

The Artemis program is part of NASA's effort to return humans to the moon. NASA and its international partners are planning to build a lunar space station to support activities both on and around the Moon.

Artemis wants a sustainable and permanent return to the moon. NASA's sights are not set on the moon, according to the agency's chief astronauts. It is clear that our sights are on Mars. The technologies and experiences gained during Artemis will be used to prepare NASA and its partners for crewed treks to the Red Planet. NASA is dependent on Artemis 1 to succeed. Jim Free, director of exploration systems at NASA, told reporters on November 11 that they wouldn't get to Artemis 2 if Artemis 1 wasn't successful.

NASA tried to launch Artemis 1 twice before, both times they got a scrub. The first scrub was canceled due to a faulty sensor and the second one was due to a hydrogen leak. NASA performed a test on September 27 after the second scrub. Hurricane Ian forced the postponement of the third SLS launch attempt on September 27.

What is the role of SLS in Artemis 1?

The only rocket that can take humans to the moon is the Space Launch System, which is one of the core technologies for the Artemis program. It has the most powerful rocket ever built. The system that launched the Space Shuttle and the super heavy-lift launch vehicle will be more powerful. 17 million pounds of thrust will be achieved at the first launch of the Starship. From where the capsule can begin its journey to the Moon, SLS will be tasked with delivering it.

SLS at Launch Complex 39B at NASA’s Kennedy Space Center in Florida.

The rocket will weigh six million pounds when it is launched. NASA will use the Block 1 variant of SLS, which includes the core stage, a pair of five-segment solid rocket boosters attached to the side, and the capsule on top. It will be possible to lift over 27 tons to space. At the 90-second mark, SLS will reach max q, the point at which the greatest aerodynamic stress is experienced.

John Honeycutt, Space Launch System program manager at NASA's Marshall Space Flight Center, told the press that the side boosters will fire for nearly three minutes. The boosters will plunge into the ocean after falling from the core stage. The boosters will not be recovered by NASA. After the core stage shuts down, the service module panels and launch abort system will be thrown away. While still attached to the ICPS, the crew capsule will separate from the rocket and travel to the moon.

What happens when Orion reaches the Moon?

ICPS will help with a perigee raise maneuver and a 20-minute trans-lunar injection after the deployment of the solar array on Earth. After the ICPS deploys 10 cubesats that are headed to the Moon, the other side will separate.

Artist’s conception of Orion’s ICPS performing an engine burn to place it on a Moon-bound trajectory.

The European Space Agency will provide the power for the service module that will be used. During the four day journey to the Moon, ground teams will carefully track the capsule's performance. The service module will perform a critical lunar gravity assist maneuver when it arrives at its destination. The closest approach will see the craft come to within 60 miles of the moon. The close flyby of the moon is likely to be one of the highlights of the mission.

The capsule will travel tens of thousands of miles past the Moon, which is 30,000 miles farther than the previous record set during Apollo 13 and the farthest in space any spaceship built for humans has flown.

During a cruise behind the Moon, time communication with ground controllers will be lost, as the moon is in the same plane as Earth and the Moon.

Will anything be inside Orion?

The Artemis 1 doesn't involve a human crew. Three manikins are going to be riding inside. The fake crew members will show what real astronauts will go through.

The Campos manikin being placed inside Orion on August 3, 2022.

NASA will use a standard spacesuit to measure radiation and g-forces during the journey. The Van Allen Belts are protective of high-energy particles positioned between the Earth and the moon. The crew impact attenuation system will be strapped to the moonikin.

Diagram showing the seating configuration for the three manikins, with Campos up top, Helga at bottom left, and Zohar, wearing the radiation vest, at right.

The GermanAerospace Center designed the MARE experiment, which will involve Helga and Zohar. Her companion, Helga, will not wear the vest and instead serve as the control.

During the August 3 press briefing, Bhavya Lal, associate administrator for technology, policy, and strategy at NASA, said that women are more vulnerable to space radiation risks than men. Humans will be exposed to more energetic particles in deep space due to the Sun's solar flares. Lal said that the manikin trio is important because of the radiation challenge.

The other passengers include the sheep. An iPad will be sent to the Moon in an experiment to see if Amazon's voice assistant works.

Does Artemis 1 involve other payloads?

I agree. The 10 cubesats will be launched shortly after launch. The satellites will head to the moon on their own, where they will conduct science and technology missions.

The lunar ice cube has an Artemis secondary payload.

NASA will use a spectrometer to study lunar ice, while the agency's BioSentinel probe will carry yeast to measure the effect of radiation on living organisms over a long duration. The first study of the biological response to space radiation will be conducted by BioSentinel. The cubesats will perform the same tasks in the lunar environment.

What will happen when Orion comes back to Earth?

A return trajectory correction will be performed after a number of weeks in lunar space. It will get another gravity assist from the Moon as it does a second close flyby, firing engines at precisely the right time to harness the Moon's gravity and accelerate back toward Earth.

Artist’s conception of Orion passing behind the Moon. NASA hopes to capture an Earthrise image similar to this during the Artemis 1 mission.

Four days is how long it will take to get home. The service module of the European Space Agency will be thrown away just prior to reentering the atmosphere. During the time it takes for the capsule to slam into our planet's atmosphere, it will set a record for the fastest return of a space vehicle. The heat shield will have to take the brunt of the abuse as it slows down to 300 miles per hour.

Nelson said at the press conference on August 3 that a future Mars mission is likely to reach a speed of 27,400 miles per hour. He said that they have a lot of testing to do and that the heat shield is the most advanced one ever. The test flight is just the beginning, he told reporters.

Orion recovery rehearsal on November 1, 2018.

A series of parachutes will allow for a gentle splash down in the Pacific Ocean off the coast of San DIEGO. Teams from NASA and the Navy will inspect and recover the vehicle using small boats and a ship.

The service module will fall as dust onto the Pacific Ocean after it burns up on reentering.

What are NASA’s key objectives for Artemis 1?

The objectives for the debut Artemis mission were listed during the August 3 press briefings.

The space agency needs to confirm that the heat shield will be able to hold up in the atmosphere. NASA says that no aerodynamic or aerothermal test facility can recreate the conditions the heat shield will experience returning to the moon. The expected heat is half the temperature of the sun.

The space agency will use Artemis 1 to demonstrate its operations and facilities throughout the mission, such as NASA's launch facilities and ground-based infrastructure, SLS operations, and recovery procedures.

After splashdown, there will be a third objective to get to Orion. Upon the conclusion of the mission, the spaceship will be returned to Kennedy Space Center where it will be inspected. Teams will gather data and test the integrity of the vehicle to better understand theengineering uncertainties. The data collected by the three manikins will be retrieved by ground teams. The parachute system will be recovered.

NASA wants to certify the capsule's optical navigation system, deploy the 10 cubesats, and gather imagery. Rick LaBrode, NASA's lead Artemis 1 flight director, said at the August 5 briefing that NASA will make extra efforts at public outreach, with at least one media event or release scheduled for each day of the mission. The famous photos of the Apollo era will be captured by NASA as they attempt to capture an Earthrise photo.

It will be an amazing 25-day journey as NASA and partners embark on a new chapter in the history of space exploration. On November 16th, it all starts.

The article was first published in August.

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