银河系中心有什么？
What lies at the center of the Milky Way?
银河系中心存在一个约400万倍太阳质量的超大质量黑洞，名为人马座A*。周围恒星以极高速度绕它运行，为黑洞的存在提供了直接证据。
At the Milky Way's center sits a supermassive black hole of about 4 million solar masses called Sagittarius A*. Nearby stars orbit it at extreme speeds, direct evidence for the black hole.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#人马座A* #超大质量黑洞 #银河系中心 #恒星轨道
银晕和银盘在恒星组成上有何差异？
How do the galactic halo and disk differ in their stars?
银盘主要由较年轻、金属丰度较高的恒星和气体构成，呈扁平盘状；银晕则包含年老、金属贫乏的恒星和球状星团，呈球状分布。这反映了银河系层次化的形成历史。
The disk is made of younger, metal-rich stars and gas in a flat plane, while the halo holds old, metal-poor stars and globular clusters in a spherical distribution. This mirrors the Milky Way's layered formation history.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#银晕 #银盘 #星族 #银河系结构
太阳系位于银河系的什么位置？
Where is the solar system located in the Milky Way?
太阳系位于银河系的一条旋臂（本地臂）上，距银心约2.7万光年。它绕银心公转一周约需2.3亿年。
The solar system lies in a spiral arm of the Milky Way called the Local Arm, about 27,000 light-years from the galactic center. It takes roughly 230 million years to orbit once.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#本地臂 #银心 #银河系位置 #公转
银河系是什么形状的？
What shape is the Milky Way?
银河系是一个棒旋星系，直径约10万光年，包含约1000亿至4000亿颗恒星。我们从内部看，它像一条横贯夜空的明亮光带。
The Milky Way is a barred spiral galaxy about 100,000 light-years across, holding some 100 to 400 billion stars. Seen from inside, it appears as a bright band across the night sky.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#银河系 #棒旋星系 #恒星 #星系
银河系和仙女座星系哪个更大？
Which is larger, the Milky Way or Andromeda?
仙女座星系（M31）比银河系略大，直径约22万光年，恒星数量也更多。二者正以约110公里每秒的速度相互靠近。
The Andromeda Galaxy (M31) is slightly larger than the Milky Way, about 220,000 light-years across with more stars. The two are approaching each other at roughly 110 kilometers per second.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#仙女座 #M31 #星系大小 #碰撞前景