Milky Way - Wikipedia
The orbital speed of the Solar System about the center of the Milky Way is approximately 220 km/s (490,000 mph) or 0.073% of the speed of light. The Sun moves through the heliosphere …
Milky Way Galaxy | Size, Definition, & Facts | Britannica
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 …
The Milky Way - NASA
Discover the mysteries of our home galaxy, the Milky Way, with NASA's in-depth exploration of its structure and composition.
Science 101: The Solar System - National Geographic Society
2024年12月3日 · How many planets are in the solar system? How did it form in the Milky Way galaxy? Learn facts about the solar system's genesis, plus its planets, moons, and asteroids.
NASA’s Webb Reveals New Features in Heart of Milky Way
2023年11月20日 · The NIRCam (Near-Infrared Camera) instrument on NASA’s James Webb Space Telescope’s reveals a portion of the Milky Way’s dense core in a new light. An …
In Depth | Our Solar System - NASA Solar System Exploration
The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy. Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets …
Milky Way galaxy: Facts about our cosmic neighborhood | Space
2023年4月18日 · Just as Earth orbits the sun, the solar system orbits the center of the Milky Way. Despite hurtling through space at speeds of around 515,000mph (828,000kmph) our solar …
Milky Way and Our Location - NASA
2012年2月1日 · The Milky Way Galaxy is organized into spiral arms of giant stars that illuminate interstellar gas and dust. The Sun is in a finger called the Orion Spur. Overlaid is a graphic of …
The Milky Way Galaxy - Imagine the Universe!
2025年1月9日 · The Milky Way is approximately 100,000 light-years in diameter. Our solar system is 26,000 light-years from the center of the Galaxy. All objects in the Galaxy revolve around …
Milky Way Galaxy - Structure, Dynamics, Stars | Britannica
2025年1月15日 · There are three spiral arms in the part of the Milky Way Galaxy wherein the solar system is located. Theoretical understanding of the Galaxy’s spiral arms has progressed …