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Astronomers Have Finally Found the Edge of the Milky Way

Astronomers Have Finally Found the Edge of the Milky Way

Iwastheone quotes Science News:
Astronomers have lengthy identified that the brightest half of the Milky Way, the pancake-shaped disk of stars that homes the solar, is a few 120,000 light-years throughout. Beyond this stellar disk is a disk of fuel. An enormous halo of darkish matter, presumably full of invisible particles, engulfs each disks and stretches far past them. But as a result of the darkish halo emits no mild, its diameter is tough to measure. Now, Alis Deason, an astrophysicist at Durham University in England, and her colleagues have used close by galaxies to find the Milky Way’s edge

To discover the Milky Way’s edge, Deason’s workforce carried out laptop simulations of how big galaxies like the Milky Way kind. In explicit, the scientists sought circumstances the place two big galaxies arose aspect by aspect, like the Milky Way and Andromeda, our nearest big neighbor, as a result of every galaxy’s gravity tugs on the different. The simulations confirmed that simply past the edge of a large galaxy’s darkish halo, the velocities of small close by galaxies drop sharply. Using present telescope observations, Deason and her colleagues discovered an identical plunge in the speeds of small galaxies close to the Milky Way. This occurred at a distance of about 950,000 light-years from the Milky Way’s heart, marking the galaxy’s edge, the scientists say.

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