Artemis II: Humanity Returns to the Moon as SLS Countdown Begins at Kennedy Space Center (Video)

CAPE CANAVERAL, Fla. — The air at the Kennedy Space Center is thick with a familiar, yet long-absent electricity. For the first time in over fifty years, a crewed spacecraft is perched atop a behemoth rocket with the Moon as its destination. As of Sunday evening, March 29, 2026, NASA officials have confirmed that the Artemis II mission is “Go” for a launch attempt on Wednesday, April 1, at 6:24 p.m. EDT.

The 322-foot-tall Space Launch System (SLS) rocket, currently bathed in floodlights at Launch Complex 39B, represents more than just a feat of engineering; it is the physical manifestation of a multi-decade ambition to return humans to deep space. After years of development, technical hurdles, and a series of nail-biting delays earlier this spring, the mission to send four astronauts around the Moon is finally within reach.

The Mission of a Generation

Artemis II is the first crewed flight under NASA’s Artemis campaign, a multi-phased effort to establish a sustainable human presence on the Moon and eventually send the first astronauts to Mars. Unlike its predecessor, the uncrewed Artemis I mission that successfully orbited the Moon in late 2022, Artemis II will carry four humans on a 10-day test flight that will push the Orion spacecraft to its limits.

The crew—Commander Reid Wiseman, Pilot Victor Glover, Mission Specialist Christina Koch of NASA, and Mission Specialist Jeremy Hansen of the Canadian Space Agency (CSA)—arrived at the Florida spaceport on Friday, March 27. Since then, they have been in the final stages of quarantine, a standard procedure to ensure they remain healthy before their departure into the harsh environment of space.

“I think the nation and the world has been waiting a long time to do this again,” Commander Reid Wiseman told reporters upon his arrival. “The vehicle looks amazing on the pad… it’s just been an awesome start to this journey.”

Meet the Crew: Pioneers of the New Lunar Era

The four individuals chosen for this mission represent a significant shift in the demographics of lunar exploration. While the Apollo missions of the 1960s and 70s were flown exclusively by white male test pilots, the Artemis II crew reflects a modern, international coalition.

• Commander G. Reid Wiseman: A veteran of the International Space Station (ISS), Wiseman previously served as the Chief of the Astronaut Office. His leadership will be critical as the crew navigates the first-ever manual handling tests of the Orion spacecraft in high Earth orbit.
• Pilot Victor J. Glover: Glover, who served as pilot on the SpaceX Crew-1 mission, will make history as the first person of color to travel to the Moon. His experience with modern touchscreen-based flight systems is vital to the Orion capsule’s advanced avionics.
• Mission Specialist Christina Hammock Koch: Holding the record for the longest single spaceflight by a woman, Koch will become the first woman to venture into deep space. A former engineer at NASA’s Goddard Space Flight Center, she will bring her technical expertise in spacecraft systems to the mission’s rigorous checkout phases.
• Mission Specialist Jeremy Hansen: Representing the Canadian Space Agency, Hansen will be the first non-American to leave Earth orbit. A former fighter pilot, his inclusion highlights the deep international partnerships that define the Artemis program.

10 Days in Deep Space: The Mission Profile

The Artemis II mission is a “hybrid free-return trajectory,” designed to ensure the crew can return to Earth safely even if their primary propulsion systems fail after the initial moon-bound burn. The 10-day flight is meticulously scheduled:

Phase 1: Launch and High Earth Orbit (Days 1–2)

Following liftoff from Pad 39B, the SLS rocket’s twin solid rocket boosters and four RS-25 core stage engines will provide 8.8 million pounds of thrust to propel Orion into space. After the core stage separates, the Interim Cryogenic Propulsion Stage (ICPS)—the rocket’s upper stage—will perform a series of burns to place Orion into a high Earth orbit (HEO).

During the first 24 hours, the crew will stay in HEO, reaching an altitude of roughly 37,000 miles. This “parking” phase is crucial. It allows the crew to test Orion’s life support systems, communication arrays, and navigation equipment while still being relatively close to Earth. If any critical system malfunctions, they can quickly initiate a return to the Pacific Ocean.

One of the most anticipated technical tests during this phase is the Proximity Operations Demonstration. The crew will use Orion’s manual flight controls to maneuver the spacecraft near the spent ICPS stage. This exercise mimics the docking procedures that will be required for future missions to the Lunar Gateway and the lunar surface.

Phase 2: The Journey to the Moon (Days 3–6)

Once the “Go” is given for the Translunar Injection (TLI) burn, Orion’s service module engine will fire to send the crew on a four-day outbound journey. During this transit, the crew will conduct scientific experiments, including the AVATAR (A Virtual Astronaut Tissue Analog Response) project, which uses “organ-on-a-chip” technology to study the effects of deep-space radiation on human cells.

They will also test the Orion Artemis II Optical Communications System (O2O). This laser-based communication system aims to transmit high-definition video and data back to Earth at rates of up to 260 megabits per second—a massive leap over the radio frequencies used during the Apollo era.

Phase 3: Lunar Flyby and Record-Breaking Distance (Day 7)

Artemis II will not orbit or land on the Moon. Instead, it will perform a “lunar flyby,” using the Moon’s gravity to whip the spacecraft around the far side. At its closest approach, Orion will be approximately 4,600 miles above the lunar surface.

As they pass behind the Moon, the crew will experience a period of radio silence, cut off from Earth by the lunar mass. During this time, they will capture high-resolution imagery of the lunar far side, providing data that will help select landing sites for Artemis III. At the apex of their journey, the crew will reach a distance of 248,655 miles from Earth, surpassing the record set by the crew of Apollo 13 for the farthest distance humans have ever traveled into space.

Phase 4: The Long Way Home (Days 8–10)

After the flyby, Orion will begin its four-day return trip. This phase is largely governed by physics; the free-return trajectory ensures that gravity does most of the work. The crew will spend these days preparing for the most dangerous part of the mission: reentry.

On Day 10, the Orion crew module will separate from the service module. It will hit Earth’s atmosphere at a staggering 25,000 miles per hour (Mach 32). The spacecraft’s heat shield, made of Avcoat, must withstand temperatures of nearly 5,000°F—about half as hot as the surface of the sun. Following a successful parachute deployment, the capsule is expected to splash down in the Pacific Ocean off the coast of San Diego, where a joint NASA and U.S. Navy recovery team will be waiting.

Overcoming the “Hydrogen Gremlins”

The path to the April 1 launch date has been fraught with technical challenges. In February 2026, the mission faced a significant setback during its first “wet dress rehearsal.” Engineers detected a persistent liquid hydrogen leak in the “tail service mast umbilical”—the same type of issue that plagued the Artemis I launch campaign.

“With more than three years between SLS launches, we fully anticipated encountering challenges,” said NASA Administrator Jared Isaacman in a statement following the February delay. “That is precisely why we conduct a wet dress rehearsal. We will only launch when we believe we are as ready to undertake this historic mission.”

In addition to the fuel leaks, technicians had to replace a faulty valve associated with the Orion crew module’s hatch pressurization system. These repairs forced the rocket back to the Vehicle Assembly Building (VAB) for several weeks, pushing the launch from its original February window into the current April timeframe.

The SLS: A Modern Titan

The Space Launch System is the only rocket currently capable of sending the Orion spacecraft, its crew, and heavy cargo to the Moon in a single launch. The Block 1 configuration used for Artemis II utilizes many components derived from the Space Shuttle and Saturn V programs but upgraded for the 21st century.

The core stage, standing 212 feet tall, houses 733,000 gallons of super-cooled liquid hydrogen and liquid oxygen. The four RS-25 engines at its base are actual flight-proven engines that previously flew on various Space Shuttle missions, now repurposed for the ultimate deep-space mission.

Unlike the Shuttle, which was a side-mount vehicle, the SLS is a “stack” configuration, placing the crew safely at the top of the rocket. This design allows for the inclusion of the Launch Abort System (LAS), a high-thrust motor capable of pulling the Orion capsule away from the rocket in milliseconds should an emergency occur during the ascent.

Science on the Edge

While the primary goal of Artemis II is to test life support and flight systems, the mission also carries several important payloads:

1. CUBESATS: Several small satellites will be deployed to study the lunar environment and space weather.
2. Radiation Monitoring: Because Artemis II will travel through the Van Allen radiation belts and out into the high-radiation environment of deep space, the crew will wear specialized sensors to map dose rates in different parts of the cabin.
3. Human Physiology: NASA’s Human Research Program will monitor the crew’s sleep patterns, cognitive performance, and fluid shifts to better understand how the human body adapts to missions longer than those typically flown to the ISS.

Looking Toward the Future: Artemis III and Beyond

Success for Artemis II is the prerequisite for Artemis III, currently targeted for late 2027 or 2028. Artemis III will be the mission that finally returns humans to the lunar surface, specifically the lunar South Pole—a region believed to contain vast deposits of water ice in permanently shadowed craters.

“Artemis II is the bridge,” says Associate Administrator Amit Kshatriya. “It proves that the hardware, the software, and the human element are ready to leave Earth’s orbit behind for good. Everything we do over these 10 days informs how we will eventually land the first woman and first person of color on the Moon’s surface.”

Beyond the Moon, NASA views the Artemis program as a testing ground for Mars. The technologies being debuted on this flight—high-speed reentry, deep-space life support, and autonomous navigation—are the building blocks for a journey that will eventually take humans to the Red Planet in the late 2030s.

The Final Countdown

As the countdown clock begins its final 48-hour sequence tomorrow afternoon, the eyes of the world will be fixed on the Florida coast. For a generation that grew up on stories of Apollo, this is the moment those stories become reality again. For a younger generation, this is the beginning of their own era of exploration.

The weather forecast currently remains an encouraging 80% favorable, with the only minor concerns being potential high-altitude winds. If the mission launches as planned on Wednesday, it will mark the end of a 54-year hiatus and the start of a permanent human presence in the stars.

“We are ready,” Commander Wiseman said in a final check-in from quarantine. “The crew is ready, the rocket is ready, and it’s time to go to work.”

Sources Used and Links

• NASA: NASA Sets Coverage for Artemis II Moon Mission
• Space.com: Artemis 2 moon mission latest news: NASA still targeting April 1 for launch
• The Planetary Society: The Artemis II mission: What to expect
• Wikipedia: Artemis II Mission Overview and History
• Kennedy Space Center Visitor Complex: Artemis II Launch Information and Status
• NASA Blogs: Final Preparations Underway for NASA’s Moon Mission