Orion (spacecraft)

Orion (spacecraft)
NASA's Orion Spacecraft Solar Array Camera · Public domain · source
Name	Orion
Caption	Artist's concept of the Orion spacecraft in space.
Manufacturer	Lockheed Martin (crew module), Airbus Defence and Space (service module)
Operator	NASA
Applications	Crewed exploration beyond Low Earth orbit
Spacecraft type	Capsule
Design life	21 days (free flight)
Launch mass	Crew module: 22,900 lb (10,400 kg), Service module: 34,085 lb (15,461 kg)
Dimensions	Crew module: 10 ft 10 in (3.3 m) height, 16 ft 6 in (5.0 m) diameter
Power	Solar arrays
Status	In service

Orion (spacecraft) is a crew capsule designed and built primarily by Lockheed Martin for NASA's deep space exploration programs. It serves as the primary crew vehicle for missions under the Artemis program, which aims to return humans to the Moon and establish a sustainable presence there as a precursor to future missions to Mars. The spacecraft consists of a crew module, a service module provided by the European Space Agency (ESA), and a launch abort system, and is launched atop the Space Launch System (SLS) rocket.

Overview

The Orion spacecraft is a key component of NASA's plans for human exploration beyond Low Earth orbit, representing the agency's first crew-capable vehicle designed for such missions since the Apollo program. Intended to carry astronauts to destinations including the Moon, lunar orbit, and potentially Mars, it builds upon legacy designs while incorporating modern technology. Its development is managed by NASA's Johnson Space Center in Houston, with major contributions from international partners like the European Space Agency. The program has involved extensive testing, including the uncrewed Exploration Flight Test-1 in 2014 and the Artemis 1 mission in 2022, to validate its systems for crewed flight.

Development

The Orion concept originated from the Constellation program, announced by President George W. Bush in 2004, which aimed to return astronauts to the Moon. Following the cancellation of Constellation under the administration of President Barack Obama, the spacecraft was repurposed and became the centerpiece of NASA's evolving deep space strategy. Major development contracts were awarded to Lockheed Martin for the crew module and to Airbus Defence and Space, working for the European Space Agency, for the service module. Critical design reviews, such as the one held at NASA's Kennedy Space Center, were passed throughout the 2010s, leading to the integrated spacecraft's first flight on the Space Launch System during the Artemis 1 mission.

Design and specifications

Orion's design features a conical crew module significantly larger than the Apollo command module, with a diameter of 16.5 feet, allowing it to support four astronauts for missions up to 21 days. The crew module is constructed from an aluminum-lithium alloy and is protected during re-entry by the world's largest heat shield, based on material from the Space Shuttle program. The European Service Module, built by Airbus Defence and Space, provides propulsion, power via four solar array wings, and life support. Key avionics and software are derived from technology used in the Boeing 787 Dreamliner, and the spacecraft's launch abort system, built by Aerojet Rocketdyne, can pull the crew module to safety in an emergency during ascent.

Missions

The first major test flight, Exploration Flight Test-1 (EFT-1), launched on a Delta IV Heavy rocket from Cape Canaveral Space Force Station in December 2014, successfully testing the crew module's re-entry at lunar-return velocities. The uncrewed Artemis 1 mission, launched in November 2022 from Kennedy Space Center on the inaugural flight of the Space Launch System, demonstrated a complete Orion spacecraft on a 25-day journey around the Moon, validating its systems in deep space. The upcoming Artemis 2 mission, scheduled for no earlier than September 2025, will carry a crew of four NASA astronauts—including Christina Koch and Victor Glover—on a lunar flyby, marking the first crewed mission beyond low Earth orbit since Apollo 17.

Future plans

Following Artemis 2, the Artemis 3 mission is planned to land the first woman and the next man on the lunar surface near the lunar south pole, utilizing Orion to transport the crew to lunar orbit where they will transfer to a Starship Human Landing System provided by SpaceX. Subsequent Artemis missions aim to establish the Lunar Gateway, a small space station in orbit around the Moon, which Orion will regularly dock with. NASA and its partners, including the European Space Agency and the Japan Aerospace Exploration Agency, are also studying enhanced versions of Orion and mission architectures for eventual crewed voyages to Mars, with the spacecraft serving as the command module for such deep space transits.

Category:NASA spacecraft Category:Human spaceflight Category:Moon spacecraft