The same burn that sent them outward will bring them back.
At 7:49 in the evening on April 2nd, the Orion capsule's main engine lit up and burned for five minutes and fifty seconds — and just like that, four human beings were no longer in orbit around Earth. They were going to the moon.
The maneuver, known as a translunar injection burn, is the decisive moment in any lunar mission. It's the point of commitment, the moment when the spacecraft stops circling and starts traveling. For Artemis 2, which had launched the previous evening from Kennedy Space Center in Florida, it marked the end of a 24-hour checkout period in Earth orbit and the beginning of something that hasn't happened in more than half a century.
Aboard Orion were four astronauts: Reid Wiseman, Victor Glover, and Christina Koch of NASA, and Jeremy Hansen of the Canadian Space Agency. In the minutes after the burn completed, Hansen spoke to the ground — and through the ground, to everyone who had spent years making this moment possible. He said the crew was feeling good, and that they had felt the weight of all that human effort in every second of the engine's firing. He called it a demonstration of what humanity is capable of when it holds onto hope.
The mission management team had spent the day reviewing data from Orion's systems before formally clearing the spacecraft for the burn. Once they gave the go-ahead, there was no turning back in any ordinary sense. As Koch explained before launch, the translunar injection burn doubles as the deorbit burn — the same trajectory that carries the crew toward the moon will eventually bring them home. The moment the engine cut off, the shape of the entire mission was essentially set.
The engine that did the work has a history of its own. Salvaged from NASA's space shuttle program and upgraded for lunar-distance travel, it has flown 19 times before across three different shuttles. Engineers have calculated that its thrust is violent enough to push a car from a standstill to 60 miles per hour in under three seconds. On Thursday evening, it pushed four people out of Earth's gravitational embrace.
Artemis 2 is the first crewed flight of Orion and its Space Launch System rocket, though the hardware flew together once before — on the uncrewed Artemis 1 mission in 2022, which sent the capsule on a loop around the moon and back. This time, there are people inside. And those people are making history in ways that go beyond the mission itself.
Koch is the first woman to travel beyond low Earth orbit. Glover is the first person of color to do so. Hansen is the first non-American. The Apollo program, which last sent humans to the moon with Apollo 17 in December 1972, flew exclusively white American men. The crew of Artemis 2 looks different — and the distance they'll travel will be different too.
On the sixth day of the mission, Orion will swing around the far side of the moon. In doing so, the four astronauts will travel farther from Earth than any humans in history, surpassing the record set involuntarily by the crew of Apollo 13, who reached a maximum distance of 248,655 miles from Earth after an oxygen tank explosion forced them to abandon their landing plans and loop around the moon just to get home. The Artemis 2 crew will beat that mark deliberately, on a mission that is going exactly as planned.
What comes next is the return. The same burn that sent them outward will, in the geometry of orbital mechanics, bring them back. The crew and mission controllers will be watching the lunar flyby closely — it is both the emotional peak of the mission and a critical data point for the Artemis program's longer ambitions, which include landing astronauts on the moon's surface in the years ahead.
Notable Quotes
Humanity has once again shown what we are capable of, and it's your hopes for the future that carry us now on this journey around the moon.— Jeremy Hansen, Canadian Space Agency astronaut, speaking after the TLI burn
As soon as we take that burn, we have bought off on basically the rest of the mission.— Christina Koch, NASA astronaut, in a pre-launch interview
The Hearth Conversation Another angle on the story
Why does this burn matter so much? Couldn't they have adjusted course later?
Not really, no. The translunar injection burn is the whole game. It sets the trajectory so precisely that no major correction is needed afterward — the physics just carry you the rest of the way.
So they were committed the moment the engine cut off?
Completely. Koch said it herself before launch — the burn is also the deorbit burn. The same arc that takes them to the moon brings them home. There's no separate decision point.
Five minutes and fifty seconds seems short for something so consequential.
That's what's strange about spaceflight. The most important moments are often the briefest. Less than six minutes of thrust, and you've left Earth orbit. The rest is coasting.
Hansen's words after the burn were striking. Was that scripted?
It didn't read that way. He talked about feeling the perseverance of everyone who worked on Artemis during every second of the burn. That's not a press release — that's someone processing something real in real time.
The engine came from the shuttle program. Does that feel like a workaround, or is it intentional continuity?
A bit of both, probably. NASA salvaged what worked and upgraded it. There's something fitting about hardware that flew on shuttles now heading to the moon — it's the same institutional knowledge, extended.
The diversity angle — is that being overstated, or does it genuinely matter?
It matters. The Apollo program was a product of its era in every sense, including who got to go. The fact that the first woman and first person of color to leave low Earth orbit are doing it together, on the same mission, is not a footnote.
What's the record they're going to break, and why does it belong to Apollo 13 of all missions?
Apollo 13 had to loop around the far side of the moon to get home after the explosion crippled the spacecraft. They went farther than any planned mission required — 248,655 miles. Artemis 2 will beat that, but on purpose.
What should we be watching for in the days ahead?
The lunar flyby on day six. That's when they'll be farthest from Earth, farthest from rescue, farthest from anything human-made. And if everything holds, they'll just swing around and come home.