Milky Way - Wikipedia
The Milky Way is a barred spiral galaxy with a D 25 isophotal diameter estimated at 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years), [10] but only about 1,000 light-years thick at the spiral arms (more at the bulge).
Our Milky Way Galaxy: How Big is Space? - Science@NASA
2019年4月2日 · Our galaxy probably contains 100 to 400 billion stars, and is about 100,000 light-years across. That sounds huge, and it is, at least until we start comparing it to other galaxies. Our neighboring Andromeda galaxy, for example, is some 220,000 light-years wide.
How Big is the Universe? | Size, Why So Big, Infinite & Facts
The observable Universe is 93 billion light-years, yet, our galaxy, the Milky Way, is just 100,000 light-years in diameter. It would take us endless generations just to explore our galaxy, let alone the Universe.
How Big Is The Milky Way? - Universe Today
2015年1月20日 · We are not anywhere near the center — NASA says we’re roughly 165 quadrillion miles from the galaxy’s black hole, for example — which demonstrates just how darn big the galaxy is. So how...
Milky Way Galaxy | Size, Definition, & Facts | Britannica
2024年12月17日 · The first reliable measurement of the size of the Milky Way Galaxy was made in 1917 by American astronomer Harlow Shapley. Assuming that the globular clusters outlined the Galaxy, he determined that it has a diameter of about 100,000 light-years.
How big is the Milky Way? | Scale of the Universe - Scale of Universe
Our Milky Way is about 100,000 light-years in diameter! To give you an idea of what that means, a light-year is the distance that light can travel in one year, which is roughly 5.88 trillion miles. So, if you multiply that by 100,000, you’d get the distance across our Milky Way galaxy. That’s a number so large it’s hard to even imagine ...
Milky Way galaxy: Facts about our cosmic neighborhood | Space
2023年4月18日 · Our home galaxy's disk is about 100,000 light-years in diameter and just 1000 light-years thick, according to Las Cumbres Observatory. Just as Earth orbits the sun, the...
Our Milky Way Galaxy: How Big is Space? - Science@NASA
2019年4月1日 · When we talk about the enormity of the cosmos, it’s easy to toss out big numbers – but far more difficult to wrap our minds around just how large, how far and how numerous celestial bodies really are.
How big is our own Milky Way Galaxy (100,000 light-years)?
If we were to compress the Milky Way, a galaxy that spans an astonishing 100,000 light-years across, down to the size of Earth, approximately 12,742 km in diameter, we would be scaling the galaxy down by about 74 trillion times (74,248,394,856,229 times, to be precise).
How Big Is The Milky Way? - WorldAtlas
2022年8月1日 · The Milky Way Galaxy is estimated to be 100,000 to 200,000 light years across. The size of the Milky Way is determined using both parallax and variable stars.
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