What is orion: Definition and 32 Discussions

Orion (officially Orion Multi-Purpose Crew Vehicle or Orion MPCV) is a partially reusable crewed spacecraft used in NASA's Artemis program. The spacecraft consists of a Crew Module (CM) space capsule designed by Lockheed Martin and the European Service Module (ESM) manufactured by Airbus Defence and Space. Capable of supporting a crew of six beyond low Earth orbit, Orion can last up to 21 days undocked and up to six months docked. It is equipped with solar panels, an automated docking system, and glass cockpit interfaces modeled after those used in the Boeing 787 Dreamliner. A single AJ10 engine provides the spacecraft's primary propulsion, while eight R-4D-11 engines, and six pods of custom reaction control system engines developed by Airbus, provide the spacecraft's secondary propulsion. Although compatible with other launch vehicles, Orion is primarily intended to launch atop a Space Launch System (SLS) rocket, with a tower launch escape system.
Orion was originally conceived in the early 2000s by Lockheed Martin as a proposal for the Crew Exploration Vehicle (CEV) to be used in NASA's Constellation program. Lockheed Martin's proposal defeated a competing proposal by Northrop Grumman and was selected by NASA in 2006 to be the CEV. Originally designed with a service module featuring a new "Orion Main Engine" and a pair of circular solar panels, the spacecraft was to be launched atop the Ares I rocket. Following the cancellation of the Constellation program in 2010, Orion was heavily redesigned for use in NASA's Journey to Mars initiative; later named Moon to Mars. The SLS replaced the Ares I as Orion's primary launch vehicle, and the service module was replaced with a design based on the European Space Agency's Automated Transfer Vehicle. A development version of Orion's CM was launched in 2014 during Exploration Flight Test-1, while at least four test articles have been produced. Orion was primarily designed by Lockheed Martin Space Systems in Littleton, Colorado. As of 2022, three flight-worthy Orion spacecraft are under construction, with one completed and an additional one ordered, for use in NASA's Artemis program.
The first completed unit, CM-002, was launched on November 16, 2022 on Artemis 1.

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  1. D

    I Electromagnet on Starship Orion

    Can an electromagnet push the ship forward by absorbing the momentum of a nuclear explosion via a magnetic field? Im thinking this will solve the problem of constantly having to repair the eroding plate if its replaced by a magnetic field sustained by a fission reactor generating power...
  2. anorlunda

    Project Orion Revisited: Is Nuclear Propulsion the Future of Space Travel?

    Project Orion https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion) Orion was one of most fanciful proposals ever for use of nuclear power. Basically, the spacecraft would have a thick shield at the back end, and then use a series of nuclear explosions behind the shield for...
  3. AotrsCommander

    I Where does the Sol system lie in the cross-section of the Orion Spur?

    So, I know that Sol lies roughly in the 25 000 light years from the core and from the edge of the galaxy and thus the approximate the position when seen from "above." But what a search today has not given me any idea of is where Sol is (thought/estimated to be) in relation to, well...
  4. H

    I What Are These Mysterious Objects Spotted Near Orion?

    Hi all! I am new here :) I was observing Orion with the astro software Aladin and I found two similar relatively weird objects. I would like to share with you the image, with the zoom on each of them. Any explanation? Could they be the same object (a satellite?) seen in two different moments...
  5. mfb

    NASA Countdown to Launch: Artemis I Booster Preparations and Orion Challenges

    This a half question, half news thread. Boosters: Artemis I Launch Preparations Are Stacking Up The first element has been assembled vertically Nov 21. The problem here: As soon as that they assemble the boosters the propellant inside begins to sink down slowly. NASA thinks the booster needs to...
  6. B

    Stargazing Troubleshooting My Orion 130 Reflector

    I have an Orion 130 reflector. Never had a telescope before. The field of view is about a quarter inch through the focuser with the 25 mm eyepiece. Does anybody know what I am doing wrong or if there is something wrong with the telescope itself? I'm at my wit's end. Any help would be...
  7. T

    Project Orion again - why not interstellar probe?

    I was watching recently that PBS Space Video on youtube about space propulsion and it got me thinking about Project Orion again. They talk about sending humans to another star system, but would it not be spectacular enough to send probe? The probe could scan and photograph planets there and...
  8. B

    Anyone see the brief flash in Orion last night?

    Naked eye viewing clear sky a little before 3AM Central time I saw a "star" appear a little below and in line with the sword, only lasted about three seconds, no lateral movement, about the same brightness as the belt stars... then was gone. Roughly about 3:55-3:56AM Central. Line of sight...
  9. tony873004

    Journey to Orion - Travel from Earth to Orion

    If you could travel from Earth to Orion, it would look like this.
  10. spark802

    Capturing Orion and Comet Lovejoy in Arizona: A Journey Through Astrophotography

    Captured these two images from my trip to Arizona Feb 2015. I shot Orion in wide=field as a piggyback on my scope set up...Canon 550d,f/5.0,436 secs,ISO3200, kit lens at 36mm. For Lovejoy I shot through my 6 inch newt at ISO 800,for 300 secs guided.
  11. C

    Orion Nebula's Origin Uncovered?

    A vast ring of dust may explain the star-generating nebula’s birth. Full story (including a color image of the new dust ring, which is 330 light-years across): Scientific American.
  12. MattRob

    Orion's EFT-1 Flight: HRSI Tiles or White Surface?

    So, recently I went to see EFT-1 launch, and I've noticed something odd. In many tests, and almost every animation I see, Orion is depicted as white. But seeing pictures of Orion being prepared for EFT-1, it's the black color of what appears to be HRSI tiles...
  13. Yadama

    News Orion Launch Discussion - Live Stream & Reddit

    Decided we should have a thread for pre/post launch discussion of the orion capsule. Maybe we can talk about how much we hate wind, or maybe how much we dislike sailboats. Live stream is here: www.ustream.tv/nasahdtv Also a more active discussion over on reddit(sorted by new)...
  14. Q

    What are the best eyepieces for my new Orion XT8 telescope?

    I just bought my first telescope, finally settled on the Orion XT8 after originally considering a Celestron 90EQ refractor or 130EQ Newtonian. Figured I might as well get something that will last me a while from the get-go instead of wasting money on lower end scopes. Anyway, what are some good...
  15. AnTiFreeze3

    Stargazing Orion SpaceProbe 130 EQ question

    For a beginning telescope, how does this look? http://www.telescope.com/Shop-by-Brand/Orion-Product-Center/Orion-Telescopes/Orion-SpaceProbe-130-EQ-Reflector-Telescope/pc/8/c/90/sc/97/p/9851.uts?refinementValueIds=4691&refinementValueIds=4529&refinementValueIds=4519 At least where I'm...
  16. P

    Is There a 100 Solar Mass Black Hole in Orion Nebula?

    This paper proposes a 100 solar mass black hole in nearby Orion Nebula: http://arxiv.org/abs/1209.2114 Exciting if true. I have no particular comments, just thought it should be noted here.
  17. R

    What is the best time of year to observe Orion?

    Homework Statement It has a right ascension of 5.5h Northern Hemisphere Homework Equations The Attempt at a Solution I was thinking because at the summer solist the sun is at an RA of 6h that it ment late spring would be the best. Wikipidea says its late fall to winter. How come?
  18. C

    Stargazing Bought Orion AstroView 90mm, good?

    Hey ya'll. I just ordered up this telescope and am waiting for it to come in the mail now. http://www.telescope.com/Telescopes/Refractor-Telescopes/Refractor-Telescopes-with-Equatorial-Mounts/Orion-AstroView-90mm-Equatorial-Refractor-Telescope/pc/1/c/10/sc/335/p/9024.uts What do you guys...
  19. B

    Stargazing Go with the Orion Skyview pro 120mm refractor

    MotoH, I would go with the Orion Skyview pro 120mm refractor. It will give you a much clearer image.
  20. Drakkith

    Photo of Orion Nebula Taken 2 Weeks Ago

    Hey all! Just sharing my photo of the Orion Nebula I managed to take about 2 weeks ago. Managed to get this sucker RIGHT before sunrise. Not the greatest picture ever, but I am proud of it. [PLAIN]http://img33.imageshack.us/img33/3486/m422.jpg
  21. F

    Peacful Nuclear Explosions: Orion Project?

    I've been looking into some of the various treaties regarding the use of nuclear explosions, and I'm having trouble figuring out some of the gray zones; The United States and Russia have both signed treaties http://en.wikipedia.org/wiki/Comprehensive_Nuclear-Test-Ban_Treaty" So my question...
  22. DaveC426913

    NASA Exploring NASA's Orion Mission: What You Need to Know

    Is this new? Current? I've never heard of it before. http://www.nasa.gov/mission_pages/constellation/orion/index.html
  23. MotoH

    Stargazing XT10i and a Orion Skyview pro 120mm refractor

    is it ok if questions can be asked in this thread also? If so I have a couple. I am looking at an XT10i, and a Orion Skyview pro 120mm refractor. They are both essentially the same price. I want the light gathering power of the 10inch dob, but I like the portability and the ease of...
  24. A

    Cleaning a Cloudy Patch Inside Orion 120mm Telescope Lens

    I own an Orion 120mm f\5 600mm telescope . I bought it last year from Orion . I recently noticed a cloudy patch about 2in. round on the inside of the scope on the lens , it looks like condensation to me . I've always been careful when i bring the scope in the house fron the nights cold air and...
  25. russ_watters

    Getting Ready to Stargaze: My Orion Atlas 11 Arrives Soon

    I just placed an order for http://www.telescope.com/shopping/product/detailmain.jsp?itemID=194382&itemType=PRODUCT&iMainCat=4&iSubCat=10&iProductID=194382" Orion Atlas 11. With some luck, it may arrive by this weekend. Awesome.
  26. Astronuc

    NASA NASA to Name Orion Contractor Thursday (Aug 31)

    http://www.nasa.gov/mission_pages/constellation/orion/orion_contract.html Woah! There is going to be tense moments tomorrow afternoon. The contract, to be announced at a 4 p.m. EDT (2000 GMT) news conference in Washington, covers the design, development, production and testing of...
  27. V

    Exploring the Milky Way & Orion Nebula with Hubble

    http://spaceflightnow.com/news/n0601/09milkyway/ http://spaceflightnow.com/news/n0601/11hubbleorion/
  28. J

    Trapezium in orion was a very strange quadruple star

    i always thought the trapezium in orion was a very strange quadruple star - not a double binary, but an actual quadruple star group with bizarre orbital patterns. however, now i read that it is just a cluster, i guess implying that they are not really orbitally associated. can someone please...
  29. Q

    Project Orion: Exploring a Nuclear-Powered Spacecraft

    http://en.wikipedia.org/wiki/Project_Orion What do you guys think, is it time we start looking at options such as Orion again? Most of the necessary pieces of the project had/have been developed, and it is tempting to know that the first planned flight for an Orion-based spacecraft was to...
  30. J

    Is the Orion Trapezium Exploded from a Pre-Stellar Body?

    I remember have read in an old russian astronomy book that the stars of the "trapezium" are separating radially , as if in the past a giant explosion of a big body have created them, ¿ is this true ? ¿what is this "pre-stellar" body ? jp
  31. D

    Compatibility of Orion Solar Filter for Celestron 60 AZ Model

    I want to get this solar filter for my telescope. It's the Solar Filter for Observer 60 Altaz & EQ model. It was made for the Observer, but I was wondering if it would work on my Celestron 60 AZ Model (refractor)? The guide at the bottom says what model it fits, and obviously, only Orions...