File:Hubble Captures Re-energized Planetary Nebula - Flickr - NASA Goddard Photo and Video.jpg

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Stellar life and death unfold in this “born again” star! 💫

After exhausting the nuclear fuel in their cores, stars with a mass of around 0.8 to eight times the mass of our Sun collapse to form dense and hot white dwarf stars.

As this process occurs, the dying star will throw off its outer layers of material, forming an elaborate cloud of gas and dust known as a planetary nebula.

This phenomenon is not uncommon, and planetary nebulae are a popular focus for astrophotographers because of their often beautiful and complex shapes. However, a few like the one pictured here (Abell 78) are the result of a so-called “born again” star.

Although the core of the star has stopped burning hydrogen and helium, a thermonuclear runaway at its surface ejects material at high speeds.

This ejecta shocks and sweeps up the material of the old nebula, producing the filaments and irregular shell around the central star seen in this image, which features data from NASA's Hubble Space Telescope.

Image credit: ESA/Hubble & NASA, M. Guerrero; Acknowledgment: Judy Schmidt
Date Taken on 29 December 2020, 15:23
Source Hubble Captures Re-energized Planetary Nebula
Author NASA Goddard Space Flight Center from Greenbelt, MD, USA
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abell 78

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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/51059065877. It was reviewed on 25 March 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

25 March 2021

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