From DW News.

After venturing farther from Earth than any human crew in history, the astronauts on the Artemis II mission face their most dangerous test on the way home. It’s not launch. It’s not the journey around the moon. It’s re‑entry.

As the Orion spacecraft falls back toward Earth, it’s traveling at nearly 40,000 kilometers per hour—fast enough to cross the Atlantic in well under ten minutes. It’s a key moment in the Artemis II return schedule. Before hitting the atmosphere, Orion’s crew module separates from the service module and rotates into position, heat shield facing forward. From that moment on, everything depends on timing, physics, and flawless engineering.

When Orion strikes Earth’s upper atmosphere, the surrounding air is violently compressed. That compression leads to resistance, friction and staggering heat. Temperatures around the spacecraft soar to more than 2,500° C, roughly half as hot as the surface of the Sun.
The astronauts survive thanks to one of Orion’s most critical components: its ablative heat shield. Rather than trying to block the heat, the shield is designed to slowly burn away, a process that channels the massive heat being generated. While the outside glows and chars, the cabin inside remains cool enough for human life during Artemis 2 re-entry.

As Orion slows from hypersonic speeds to about 500 kilometers per hour, the next phase begins. The first parachutes deploy, stabilizing the capsule. In total, eleven parachutes—released in a carefully choreographed sequence—work together to slow the spacecraft further, reducing its speed step by step. By the time Orion splashes down in the ocean, it’s traveling at just 30 kilometers per hour.

NASA decides the splashdown point long before launch by calculating Orion’s return trajectory, Earth’s rotation, and recovery logistics. During re‑entry, Orion isn’t just falling—it actively steers by banking through the atmosphere. By the time parachutes deploy, recovery ships are already positioned in a pre‑planned landing zone. Thanks to modern guidance systems, Orion can typically splash down in this zone or within a few kilometers of it.

If all goes well, after days in deep space—and minutes that matter more than any others—the mission ends the way spaceflights always hope to: With a safe return.
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