Milky Way Galaxy; mapped

MWspitzer_lab_2048.jpg (1000 KB)

Explanation: Gazing out from within the Milky Way, our own galaxy’s true structure is difficult to discern. But an ambitious survey effort with the Spitzer Space Telescope now offers convincing evidence that we live in a large galaxy distinguished by two main spiral arms (the Scutum-Centaurus and Perseus arms) emerging from the ends of a large central bar. In fact, from a vantage point that viewed our galaxy face-on, astronomers in distant galaxies would likely see the Milky Way as a two-armed barred spiral similar to this artist’s illustration. Previous investigations have identified a smaller central barred structure and four spiral arms. Astronomers still place the Sun about a third of the way in from the Milky Way’s outer edge, in a minor arm called the Orion Spur.
APOD

  • Leave a comment ?

    4 Responses to Milky Way Galaxy; mapped

    1. definitely needs a “You Are Here” X

      Reply

    2. How do they decide where 0° is?

      Reply

    3. 0° is towards the galactic center… probably Sagittarius A*.

      Reply

    Leave a Comment




    Advertisements Alcohol Animated Images Art Awesome Things Batman Cars Comic Books Computers Cosplay Cute As Hell Animals Dark Humor Donald Trump Fantasy - Science Fiction Fashion Food Forum Fodder Gaming Humor Interesting LOLcats Military Motorcycles Movie Posters Movies Music Nature NeSFW Politics Religion Sad :( Science! Sexy Space Sports Star Trek Star Wars Technology Television Vertical Wallpaper Wallpaper Weapons Women WTF X-Mas