NASA Artemis II crew departs Earth orbit for first crewed lunar flyby since Apollo 17 in 1972

For the first time in more than 50 years, a crew of astronauts aboard a NASA spacecraft has left Earth orbit and is now on a trajectory toward the Moon. The milestone was achieved on Thursday, April 3, 2026, when Orion’s service module engine completed an approximately six-minute translunar injection burn, propelling the spacecraft and its crew away from Earth and toward lunar space.

The crew of the Artemis II mission consists of NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with Canadian Space Agency astronaut Jeremy Hansen. The four astronauts are conducting a planned 10-day test flight that will take the Orion spacecraft around the Moon and return it to Earth, representing the first crewed lunar mission since Apollo 17 departed the Moon in December 1972.

The Artemis II mission lifted off from Launch Pad 39B at NASA’s Kennedy Space Center in Florida on April 1, 2026, at 6:35 p.m. EDT. The Space Launch System rocket carried the Orion spacecraft and its four-person crew into space, marking the first time humans have flown aboard Orion in a crewed operational context.

How did Orion reach translunar trajectory and what systems were checked before the burn?

Following launch, Orion deployed its four solar array wings to begin drawing power from the Sun. Approximately 49 minutes into the flight, the Space Launch System’s upper stage, known as the interim cryogenic propulsion stage, fired to place Orion into an elliptical orbit around Earth. A second burn then propelled the spacecraft into a high Earth orbit reaching approximately 46,000 miles above the surface, where the crew and ground teams spent roughly 24 hours completing system checkouts.

During the high Earth orbit phase, the crew conducted a manual piloting demonstration using the interim cryogenic propulsion stage as a docking target. This test was designed to evaluate Orion’s handling qualities under manual pilot control. At the conclusion of the demonstration, Orion executed an automated departure burn to safely increase separation from the stage. The stage subsequently performed its own disposal burn and re-entered Earth’s atmosphere over a remote region of the Pacific Ocean.

Four small CubeSats were deployed from the Space Launch System’s Orion stage adapter prior to the stage’s re-entry. Additional tasks completed during the early mission phase included transitioning to the Deep Space Network for communications, crew acclimatisation to the space environment, completing initial rest periods, performing the first flywheel exercise session, restoring the spacecraft’s toilet to normal operations, and configuring all systems for the translunar injection burn.

The crew named the Orion spacecraft ‘Integrity,’ continuing a NASA tradition of astronaut crews assigning names to their spacecraft.

What did NASA officials say about the significance of humans leaving Earth orbit again in 2026?

Dr. Lori Glaze, acting associate administrator for the Exploration Systems Development Mission Directorate at NASA Headquarters in Washington, described the translunar injection burn as a defining milestone for the Artemis program. Dr. Glaze stated that humans had departed Earth orbit for the first time since Apollo 17 in 1972, noting that Orion was operating with crew for the first time in space and that the mission was gathering critical data and learning from each step. Dr. Glaze emphasised that eight intensive days of work remained ahead but described the development as a significant moment for the agency and the world.

What will the Artemis II crew observe during the planned lunar flyby on April 6, 2026?

A planned lunar flyby is scheduled for Monday, April 6, 2026. During the flyby, the astronauts are expected to take high-resolution photographs and provide direct visual observations of the lunar surface. The flyby trajectory includes views of areas on the far side of the Moon that have never been seen directly by human observers. Although the lunar far side will only be partially illuminated during the pass, lighting conditions are expected to produce shadows that stretch across the surface, enhancing depth, ridges, slopes, and crater rims that are typically difficult to detect under full illumination.

Why does the Artemis II mission matter for the future of crewed exploration beyond Earth orbit?

The Artemis II mission is a test flight, not a lunar landing. Its primary purpose is to validate Orion’s systems with a live crew aboard during a deep space trajectory, generating flight data that will inform the design and operational procedures for subsequent Artemis missions. The mission represents the first time NASA has sent astronauts beyond low Earth orbit since the final Apollo mission more than five decades ago.

The Artemis program is structured as a series of increasingly challenging crewed missions to the Moon, with the broader stated objectives of scientific discovery, economic development, and the establishment of infrastructure and experience required for eventual crewed missions to Mars. Artemis II is the second flight of the Space Launch System and Orion system, following the uncrewed Artemis I mission that flew a lunar orbit profile in late 2022.

The inclusion of Canadian Space Agency astronaut Jeremy Hansen in the Artemis II crew reflects NASA’s broader international partnership framework for lunar exploration. Hansen is the first Canadian astronaut to travel to the lunar region, a milestone for the Canadian Space Agency and for international spaceflight cooperation under the Artemis accords framework that has brought multiple space agencies into the program.

The choice of Launch Pad 39B at Kennedy Space Center for Artemis II carries historical resonance. The same launch complex was used during the Apollo program era and was subsequently modified to support the Space Launch System. The return of crewed deep space missions from that facility marks a continuity of American human spaceflight infrastructure spanning more than half a century.

Following the lunar flyby on April 6, 2026, the Artemis II crew is scheduled to return to Earth and splash down in the Pacific Ocean off the coast of San Diego. The recovery operation will be the first crewed deep space splashdown since the Apollo era. Mission teams will analyse all data gathered during the 10-day flight to assess Orion’s performance and identify any systems or procedures requiring modification before subsequent Artemis missions.

Key takeaways on what the Artemis II mission means for NASA, international partners, and the future of human space exploration

• NASA’s Artemis II mission achieved translunar injection on April 3, 2026, sending four astronauts beyond Earth orbit for the first time since the Apollo 17 mission in December 1972.
• The crew of Reid Wiseman, Victor Glover, Christina Koch, and Canadian Space Agency astronaut Jeremy Hansen is conducting a 10-day test flight of the Orion spacecraft, including a planned lunar flyby on April 6, 2026.
• Artemis II is a crewed test flight, not a lunar landing; its primary purpose is to validate Orion’s deep space systems and procedures with astronauts aboard ahead of future Artemis landing missions.
• Jeremy Hansen of the Canadian Space Agency becomes the first Canadian to travel to the lunar region, reflecting the international partnership structure of the Artemis program.
• The mission is designed to support NASA’s long-term objective of returning humans to the lunar surface and building the operational foundation for eventual crewed missions to Mars.