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The Happy Face of Gravitational Lensing
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图注： Captured by the NASA/ESA Hubble Space Telescope, this image showcases the galaxy cluster SDSS J1038+4849, affectionately dubbed the "happy face" cluster due to its striking resemblance to a smiling face. The two bright galaxies at the center resemble orange eyes, while the arcs surrounding them form the illusion of a smile. These arcs are actually a result of strong gravitational lensing, a phenomenon where the cluster's immense gravitational pull distorts and magnifies light from background objects. This particular case of gravitational lensing has produced an Einstein Ring, a ring-like structure formed by the precise alignment of the source, lens, and observer. By studying these gravitational lenses, astronomers gain insights into the properties of massive galaxies, allowing for a deeper understanding of the early Universe.
来源： NASA/ESA
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词汇表:
引力透镜
分类：
宇宙学
, 星系
授权许可： 公共领域 公共领域 图标
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