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This stunning image captures a small region on the edge of the inky Coalsack Nebula, or Caldwell 99. Caldwell 99 is a dark nebula — a dense cloud of interstellar dust that completely blocks out visible wavelengths of light from objects behind it. The object at the center of the image is a (much smaller) protoplanetary nebula. The protoplanetary nebula phase is a late stage in the life of a star in which it has ejected a shell of hydrogen gas and is quickly heating up. This stage only lasts for a few thousand years before the protoplanetary nebula’s central star reaches roughly 30,000 Kelvin (approximately 17,000 degrees Fahrenheit). At this point, the central star is producing enough energy to make its surrounding shell of gas glow, becoming what’s known as a planetary nebula.

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Why Mars atmosphere dissapeared:- https://www.hegtools.xyz/2020/10/isros-mangalyaan-said-mars-atmosphere.html

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space, universe, Astrology and science and technology news.

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Today meme

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New Hubble Space Telescope image of a planetary nebula, created by two aging stars that have shucked off their outer layers, but still orbit each other.

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Why did NASA not send humans to the moon again?

https://www.hegtools.xyz/2020/12/why-did-nasa-not-sent-human-to-the-moon-again.html

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How Hubble Space Telescope can see distant galaxy but not Pluto of our solar system