Physics takes over entirely — and the six minutes just have to be waited out.
At 8:07 in the evening, Pacific time, four astronauts are scheduled to hit the water off the coast of San Diego — the final punctuation on a journey that will have covered nearly 700,000 miles.
NASA laid out the minute-by-minute sequence for the Artemis II return on April 10th, filling in the precise choreography that will bring the Orion capsule and its crew from deep space back to the surface of the Pacific Ocean. The picture that emerges is one of extraordinary compression: a mission that stretched across hundreds of thousands of miles will, in its final half hour, become a very fast, very hot, very carefully managed fall.
The last major engine firing comes first. At 2:53 p.m. Eastern, Orion will execute its third and final return burn — a maneuver designed to fine-tune the spacecraft's trajectory and lock in the precise angle needed for atmospheric entry. Get that angle wrong, even slightly, and the consequences are severe. The burn is the last chance to correct course before physics takes over entirely.
At 7:33 p.m., the crew module will separate from the service module, exposing the heat shield that stands between the four people inside and temperatures approaching 3,000 degrees Fahrenheit. Four minutes later, Orion will fire an 18-second burn to set the proper entry angle and orient the shield correctly before the capsule meets the upper atmosphere.
The moment of atmospheric interface arrives at 7:53 p.m., when Orion reaches 400,000 feet while traveling at nearly 35 times the speed of sound. The crew will feel up to 3.9 Gs pressing against them. Plasma will begin building around the capsule, cutting off all radio communication for roughly six minutes — a blackout that is planned, expected, and still tense every time it happens.
When contact resumes, the capsule will be deep in its descent. At around 22,000 feet, the drogue parachutes deploy, slowing and steadying the craft. At 6,000 feet, those drogues release and three main parachutes open, dragging Orion's speed down below 136 miles per hour. By the time the capsule touches the Pacific, it will be moving at roughly 20 mph — fast enough to feel, slow enough to survive.
The total distance traveled: 694,481 miles.
A joint NASA and U.S. military recovery team will be waiting. Once Orion is in the water, crews will assist the astronauts onto an inflatable raft and ferry them by helicopter to the USS John P. Murtha. The entire extraction is expected to be complete within two hours of splashdown. From the ship, the crew will undergo post-mission medical evaluations before aircraft carry them back to NASA's Johnson Space Center in Houston.
What happens in those medical evaluations — and how the crew fares after their time in space — will be among the first data points informing how NASA prepares for the missions that follow, including the crewed lunar landing that Artemis II is designed to precede.
Notable Quotes
A combined NASA and U.S. military recovery team will be standing by to welcome the Artemis II crew home.— NASA statement
The Hearth Conversation Another angle on the story
What's the part of this sequence that most people probably don't think about?
The heat shield separation moment. At 7:33, the crew module physically detaches from the service module, and suddenly that ceramic shield is all that's between the crew and 3,000-degree heat. It's not dramatic in the way a rocket launch is, but it's the hinge everything else depends on.
The communications blackout — is that a technical limitation or something that can eventually be engineered around?
It's physics. Plasma builds up around the capsule during reentry and blocks radio signals. You can't transmit through ionized gas at those temperatures. Every crewed capsule going back to Mercury has gone through it. The six minutes just have to be waited out.
3.9 Gs sounds significant. How does that compare to a rocket launch?
A typical launch runs around 3 Gs at peak. So reentry here is actually slightly more intense, and it comes after the crew has been in microgravity — their bodies have been adapting away from gravity, not toward it.
The 694,000-mile figure — where does that number come from?
It's the total path traveled, not a straight-line distance. The Moon is roughly 240,000 miles away, but the trajectory out and back, accounting for orbital mechanics and the lunar flyby, adds up to nearly three times that.
What does the USS John P. Murtha's role tell us about how NASA thinks about recovery?
It's a deliberate redundancy. Having a naval vessel as the primary recovery platform means the crew gets medical attention at sea before any long flight back. It's a buffer between the capsule and Houston.
Is there anything about this splashdown that's genuinely new, or is it largely the same playbook as Apollo?
The playbook is similar in broad strokes — parachutes, Pacific Ocean, naval recovery. What's different is the precision of the timeline and the data being gathered for future missions. Artemis II is explicitly a test flight. Every reading from this reentry feeds into planning for the lunar landing that comes after.