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).

2025年1月15日 · Milky Way Galaxy (sometimes simply called the Galaxy), large spiral system of about several hundred billion stars, one of which is the Sun. It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds …

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 solar system...

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. Another galaxy, IC 1101, spans as much as 4 million light-years.

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!

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...

The Milky Way has a diameter of 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years) as measured using the D 25 isophote, [17][18][19] and is a barred spiral galaxy. The idea that the Milky Way is made of stars goes back to the Ancient Greek philosopher Democritus. [16]

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.

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.

2009年1月26日 · The Milky Way is a huge disk, roughly 100,000 to 120,000 light years across. Its thickness is 1,000 light years throughout most of the disk, but there is a spheroidal bulge at the...