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Today is the final day of NASA’s Artemis 2 mission, and it’s going to be a nail-biter.

The Artemis II mission began on April 1 with the launch of NASA's Space Launch System (SLS) rocket from Launch Pad 39B at Kennedy Space Center in Florida.

When the Artemis II four-person crew left Earth’s orbit, they were protected by a computing system designed to move beyond simple redundancy (a la the Apollo missions) to a fail-silent architecture.

The Artemis II crew will conclude their historic 10-day mission with a scheduled Friday splashdown off the California coast.

About 24 seconds after reentry, the spacecraft will largely be engulfed in plasma, leading to a six-minute blackout period.

When to see NASA’s Artemis astronauts splashdown after their 10-day moon mission, but not before their Orion spacecraft heats to 5,000°F during a 16-minute blackout.

This is the critical moment where the spacecraft proves it can safely carry its crew back home. But when reentry begins, the ...