哈勃望远镜新发现：37 个矮星系中氧气离奇“失踪”

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Researchers found that dwarf galaxies can hold onto only a small fraction of the oxygen made by their stars. NASA, ESA, Hubble Heritage–ESA/Hubble Collaboration, Alessandra Aloisi (STScI, ESA) This photo released on Nov. 2, 2026, showcases NGC ?4449, a dwarf irregular. Researchers using NASA’s Hubble Space Telescope studied 37 nearby dwarf galaxies — small galaxies containing a few thousand to hundreds of millions of stars — including NGC 4449 and found that much of the oxygen they expected to see is missing. Read more about this mystery. Image credit: NASA, ESA, Hubble Heritage–ESA/Hubble Collaboration, Alessandra Aloisi (STScI, ESA) Was this page helpful? ×