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This rounded object isn't something seen through a microscope. Instead, it's a vast orb of gas in space, cast off by an - 2111874797809130621

 image by NASA (@nasa) with caption : "This rounded object isn't something seen through a microscope. Instead, it's a vast orb of gas in space, cast off by an " - 2111874797809130621

This rounded object isn't something seen through a microscope. Instead, it's a vast orb of gas in space, cast off by an aging star and seen by the @NASAHubble telescope. The star is visible in the orb's center, shining through the gases it formerly held onto for most of its stellar life. When stars like the Sun grow advanced in age, they expand and glow red. These so-called red giants then begin to lose their outer layers of material into space. More than half of such a star's mass can be shed in this manner, forming a shell of surrounding gas. At the same time, the star's core shrinks and grows hotter, emitting ultraviolet light that causes the expelled gases to glow. Image credit: ESA/Hubble & NASA, R. Wade

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