Astronomers analyzing data from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) identified tens of thousands of massive hydrogen gas halos, known as “Lyman-alpha nebulae,” that surrounded galaxies 10 billion to 12 billion years ago. The Astrophysical Journal reported the findings. Astronomers analyzing data from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) identified tens of thousands of massive hydrogen gas halos, known as “Lyman-alpha nebulae,” that surrounded galaxies 10 billion to 12 billion years ago. The As... [4765 chars]
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