Orion

📷 NASA / Wikimedia Commons (Public domain)

Orion is NASA’s deep-space crew capsule — the spacecraft built to carry Artemis astronauts to the Moon. Made by Lockheed Martin with a European-built service module from Airbus, it seats four and is designed to keep them alive for up to 21 days of free flight, far beyond the quick trips of Earth-orbit taxis. On the uncrewed Artemis I mission in 2022 it flew 432,210 km from Earth, farther than any spacecraft designed for humans has ever gone.

Think of Orion as Apollo’s big descendant: the same gumdrop shape, but 5.03 m across instead of 3.9, with about fifty percent more cabin volume, modern computers, and a heat shield built for reentries at nearly 40,000 km/h.

Development History

Orion began in 2006 under NASA’s Constellation program, survived that program’s cancellation in 2010, and was reborn as the Multi-Purpose Crew Vehicle for what became Artemis. In 2013, NASA and the European Space Agency agreed that Europe would supply the service module — the first time a critical piece of an American crewed spacecraft was built abroad.

The first test came on December 5, 2014, when Exploration Flight Test-1 sent an Orion capsule on two orbits atop a Delta IV Heavy, reaching 5,800 km altitude and hitting reentry speeds around 32,000 km/h to test the heat shield.

After years of delays tied to its giant Space Launch System rocket, the full spacecraft finally flew on Artemis I in November-December 2022: 25.5 days looping around the Moon, uncrewed but heavily instrumented. Artemis II, the first crewed flight, is scheduled — as of early 2026 — to send four astronauts around the Moon.

Design & Capabilities

The complete spacecraft is about 8 m long and roughly 26.5 tonnes fueled. The crew module holds four astronauts in about 9 cubic metres of habitable space, protected during reentry by a 5-metre ablative heat shield, the largest of its kind ever flown. Unlike ISS capsules, Orion must survive lunar-return reentries — Artemis I came home at about 39,400 km/h, using a skip maneuver that bounces off the upper atmosphere to shed energy.

The European Service Module supplies power from four 7-metre solar wings, plus water, oxygen, and propulsion: one shuttle-heritage AJ10 orbital maneuvering engine backed by 32 smaller auxiliary and reaction-control thrusters burning storable propellants.

Orion also carries a launch abort tower that can pull the capsule off a failing rocket at any point during ascent, and its crew module is designed for partial reuse — the Artemis II capsule reuses avionics flown on Artemis I, and later capsules are planned to refly.

Notable Missions

EFT-1 in December 2014 proved the basic capsule and heat shield in a high-speed reentry. Artemis I, launched November 16, 2022 on the first Space Launch System rocket, was the real graduation exercise: Orion entered a distant retrograde orbit around the Moon, set the 432,210 km distance record for a crew-rated spacecraft, and splashed down off Baja California on December 11 after 25.5 days and 2.25 million km traveled.

The heat shield came back with more charring and material loss than models predicted, a finding NASA spent 2023-2024 investigating before clearing the Artemis II shield with a modified reentry profile. Artemis II will be the first crewed flight; Artemis III is slated to use Orion as the taxi to and from a Starship lunar lander near the Moon.

Frequently Asked Questions

How is Orion different from Crew Dragon?

They solve different problems. Crew Dragon is a low-Earth-orbit taxi, optimized for short hops to the ISS 400 km up. Orion is built for the Moon: weeks of independent life support, deep-space navigation and radiation protection, and a heat shield rated for lunar-return speeds near 40,000 km/h — about forty percent faster than a reentry from Earth orbit.

Has Orion carried astronauts yet?

Not yet as of early 2026. Both flights so far — EFT-1 in 2014 and Artemis I in 2022 — were uncrewed tests. Artemis II is scheduled to change that by flying four astronauts, including the first woman and first Canadian to travel to the Moon’s vicinity, on a free-return flyby without landing.

What rocket launches Orion?

NASA’s Space Launch System, the giant Moon rocket that first flew on Artemis I in 2022. Standing 98 m tall with about 39,000 kN of liftoff thrust, SLS is the only rocket currently able to throw the 26.5-tonne Orion directly toward the Moon. The 2014 EFT-1 test used a smaller Delta IV Heavy instead.

Why does Europe build Orion’s service module?

NASA and ESA struck a barter deal in 2013: Europe supplies service modules — based on its ATV cargo ship that once resupplied the ISS — instead of paying cash for its share of station and Artemis costs. In exchange, European astronauts get seats on Artemis missions, making Orion a genuinely international spacecraft.