Milky Way - Wikipedia
The Milky Way and the Andromeda Galaxy are a binary system of giant spiral galaxies belonging to a group of 50 closely bound galaxies known as the Local Group, surrounded by a Local Void, itself being part of the Local Sheet [275] and in turn the Virgo Supercluster.
Milky Way Galaxy | Size, Definition, & Facts | Britannica
2024年12月27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 …
The Milky Way Galaxy - NASA Science
2017年11月8日 · Using infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's elegant spiral structure is dominated by just two arms wrapping off the ends of a central bar of stars.
What is the Milky Way? It’s our home galaxy - EarthSky
2024年1月1日 · When you are standing under a completely dark, starry sky, away from light pollution, the Milky Way appears like a cloud across the cosmos. But that cloud betrays no clue as to what it actually...
Milky Way galaxy: Facts about our cosmic neighborhood | Space
2023年4月18日 · The Milky Way galaxy is our cosmic home. A barred spiral galaxy stretching 100,000 light-years across. Here we explore our galactic neighborhood in more detail.
100 years ago, Edwin Hubble proved our Milky Way galaxy isn't …
1 天前 · Shapley determined that the Milky Way was 300,000 light years across, and that our solar system was 50,000 light-years from the center. While today we know the more accurate values are 100,000 ...
The Milky Way Galaxy - Harvard–Smithsonian Center for …
The Milky Way is our galactic home, part of the story of how we came to be. Astronomers have learned that it’s a large spiral galaxy, similar to many others, but also different in ways that reflect its unique history.
The Milky Way Galaxy - Imagine the Universe!
2025年1月9日 · If you were looking down on the Milky Way, it would look like a large pinwheel rotating in space. Our Galaxy is a spiral galaxy that formed approximately 14 billion years ago. Contained in the Milky Way are stars, clouds of dust and …
The Milky Way: Understanding Our Place in the Galaxy
2023年11月1日 · The Milky Way, our celestial home, has fascinated astronomers for centuries. It is a vast galaxy, a large system that includes stars, gas (predominantly hydrogen), dust and dark matter, all bound together by gravity.
What is the Milky Way? - Live Science
2021年6月10日 · The Milky Way is a barred spiral galaxy, one of hundreds of billions in the observable universe. It's also our home. Like other galaxies, the Milky Way is an isolated collection of...