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H I region

H I region

Interstellar cloud composed of neutral atomic hydrogen.

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  1. H II region

    Large, low-density interstellar cloud of partially ionized gas.

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    Spectral line of hydrogen state transition in UHF radio frequencies.

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  1. Milky Way

    Galaxy containing the Solar System.

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    1977 radio signal detected as part of SETI.

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    Large, low-density interstellar cloud of partially ionized gas.

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  4. Andromeda Galaxy

    Barred spiral galaxy in the Local Group.

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  5. Interstellar cloud

    Accumulation of gas, plasma, and dust in space.

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  6. Nebula

    Body of interstellar clouds.

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  7. NGC 262

    Galaxy in constellation Andromeda.

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