Planetary Nebula HuBi 1 and Planetary Nebula Abell39 (IMAGE)

The University of Hong Kong

Planetary Nebula HuBi 1 and Planetary Nebula Abell39

Caption

Planetary nebula HuBi 1 (left) and another planetary nebula Abell39 (right, 6800 light years away from our solar system). Abell39 is an archetypal, textbook case of a spherical nebula surrounding a bright central star (a white dwarf), its nebula composes of hydrogen-rich ionized gas. HuBi 1, its central star has undergone a "born-again" event ejecting metal-rich material into the old, hydrogen-rich nebula, has a double-shell structure - a hydrogen-rich outer shell and a nitrogen-rich inner shell. (HuBi 1 image adopted from Guerrero, Fang, Miller Bertolami, et al., 2018, Nature Astronomy, tmp, 112. Image credit for Abell39: The 3.5m WIYN Telescope, National Optical Astronomical Observatory, NSF. URL: https://www.noao.edu)

Credit

(HuBi 1 image adopted from Guerrero, Fang, Miller Bertolami, <em>et al</em>., 2018, <em>Nature Astronomy</em>, tmp, 112. Image credit for Abell39: The 3.5m WIYN Telescope, National Optical Astronomical Observatory, NSF. URL: <a target="_blank" href="https://www.noao.edu">https://www.noao.edu</a>)

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Please credit (HuBi 1 image adopted from Guerrero, Fang, Miller Bertolami, et al., 2018, Nature Astronomy, tmp, 112. Image credit for Abell39: The 3.5m WIYN Telescope, National Optical Astronomical Observatory, NSF. URL: https://www.noao.edu) when using the image

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