有哪些证据支持暗物质的存在？
What evidence supports the existence of dark matter?
多个独立证据指向暗物质：星系外缘恒星旋转速度过快，按可见物质算引力不够；星系团中星系运动也需要额外质量；引力透镜弯曲程度超出可见物质；宇宙微波背景涨落也要求有额外物质成分。这些观测共同表明，可见物质只是宇宙的一小部分。
Several independent lines of evidence point to dark matter: stars at galaxy edges rotate too fast for the visible mass's gravity; galaxy motions in clusters need extra mass; gravitational lensing bends more than visible matter allows; and cosmic microwave background fluctuations require an extra matter component. Together they show visible matter is only a small fraction of the universe.
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)
#暗物质证据 #旋转曲线 #引力透镜
我们平时看到的普通物质占宇宙多少？
How much of the universe is ordinary matter we can see?
恒星、行星、气体等我们熟悉的普通（重子）物质只占宇宙总能量密度的约5%。剩下的约27%是暗物质，约68%是暗能量。也就是说，宇宙中绝大部分成分人类至今还不了解。
Ordinary (baryonic) matter that we know as stars, planets, and gas makes up only about 5% of the universe's total energy density. The remaining roughly 27% is dark matter and about 68% is dark energy. In other words, most of the universe's makeup remains unknown to us.
难度 专业 · 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)
#普通物质 #宇宙组成 #暗成分
为什么说宇宙在加速膨胀？
Why do we say the universe is accelerating in its expansion?
1998年两个团队通过观测遥远超新星发现，它们比预期更暗，说明宇宙膨胀不仅没减速反而在加快。这一意外结果指向某种排斥性的暗能量在起作用，并因此获得2011年诺贝尔物理学奖。此后多项独立观测都证实了加速膨胀。
In 1998 two teams found distant supernovae dimmer than expected, meaning expansion is speeding up rather than slowing. The surprise pointed to a repulsive dark energy and won the 2011 Nobel Prize in Physics. Many independent observations since have confirmed the acceleration.
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)
#加速膨胀 #超新星 #暗能量
暗物质可能由什么粒子构成？
What particles might dark matter be made of?
主流候选是一种称为弱相互作用大质量粒子（WIMP）的假想粒子，它们只通过引力和弱核力作用。其他候选包括轴子、惰性中微子，以及由原始黑洞构成的可能性。全球多个地下实验和粒子对撞机正在努力寻找它们的踪迹。
The leading candidate is a hypothetical weakly interacting massive particle (WIMP) that feels only gravity and the weak nuclear force. Others include axions, sterile neutrinos, and the possibility of primordial black holes. Underground experiments and particle colliders worldwide are hunting for traces of them.
难度 入门 · 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)
#暗物质粒子 #WIMP #轴子