How much area of space is covered by 'the galaxy we live in.?

4 Antworten

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  • vor 9 Jahren
    Beste Antwort

    Do you mean volume...?

    Well, the *area* of the Milkway is basically a circle, 100,000 lightyears in diameter...

    So, Area=pi X r^2 - 3.141529 x (50,000ly)^2 = about 7,853,822,500 square light years....

  • vor 9 Jahren

    Milkyway is spread all around the Solar system. Hence Milkyway is spread all over the sky of our view.

    But we view the luminous portion and some very dark clouds while in the rest the matter of the galaxy offers us such transparency that it doesn't obstruct our view. These are more towards the region of Coma Berenices, Canes Venatici, Virgo constellations. perhaps it is because of the transparency we are able to see a huge number of distant galaxies in this direction. At the other end (pole) it is Sculptor/Cetus/Fornax region, where again we are able to discern a huge number of galaxies. These two ends also present us a good number of globular clusters that are expected in a spiral galaxy's Halo.

    The rim portion that girdles our visible sky is normally designated as the area where Milkyway is "present". This great circle of 360° with a strip that gradually fades, the width is arbitrary that depends on the viewer perception. Hence calculation of area of covered by 'the galaxy' can be anything from 360°² (square degrees) upward.

    Towards the centre of galaxy (in Sagittarius) it is particularly thick obstructing the view in that direction of the rest of the galaxy & anything beyond. In the near edgewise direction (Auriga/Orion/Taurus/Gemini) the galactic matter is thin save the spur of Orion arm serving as marker to remind us of the galaxy's presence.

  • John T
    Lv 6
    vor 9 Jahren

    The galaxy has a shape roughly like two sunny-side up eggs back to back - thick in the middle, thin at the edge, and about 100,000 light years across the diameter.

    The next full-size galaxy is 2,000,000 light years away. The observed universe is about 15 billion light years in all directions, so the Milky Way galaxy is a tiny, tiny part of that volume.

  • Mike
    Lv 7
    vor 9 Jahren

    Well, I describe it to the boy scouts taking astronomy merit badge as follows:

    (....a couple minutes of preliminaries, describing ratios of planets, stars, solar systems, etc...)

    If an 'average' galaxy is considered to be roughly the size of a (American) nickel coin, then the average distance between galaxies is about 1 1/2 ft (1/2 meter), and the observable universe would be a sphere about 10 miles in diameter.

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