#nebulae
Flying Across The Universe Part 3 (From Top to Bottom: Fly through the Orion Nebula, Gum 29, and Sharpless 2-106)
Credit:HubbleSite.org
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“To make this journey, we’ll need imagination, but imagination alone is not enough, because the reality of nature is far more wondrous than anything we can imagine.”
These are just a few of the beautiful visual effects from Cosmos: A Spacetime Odyssey
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South of Carina : With natal dust clouds in silhouette against glowing atomic gas, this colorful and chaotic vista lies within one of the largest star forming regions in the Milky Way galaxy, the Great Carina Nebula. The telescopic close-up frames a field of view about 80 light-years across, a little south and east of Eta Carinae, the nebula’s most energetic and enigmatic star. Captured under suburban skies improved during national restrictions, a composite of narrowband image data was used to create the final image. In it, characteristic emission from the nebula’s ionized sulfur, hydrogen, and oxygen atoms is mapped to red, green, and blue hues, a color palette also popular in Hubble Space Telescope images. The celestial landscape of bright ridges of emission bordered by cool, obscuring dust lies about 7,500 light-years away toward the southern constellation Carina. via NASA
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Detail ✨
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This gallery shows four planetary nebulas from the first systematic survey of such objects in the solar neighborhood made with NASA’s Chandra X-ray Observatory. The planetary nebulas shown here are NGC 6543 (aka the Cat’s Eye), NGC 7662, NGC 7009 and NGC 6826. X-ray emission from Chandra is colored purple and optical emission from the Hubble Space Telescope is colored red, green and blue. A planetary nebula is a phase of stellar evolution that the sun should experience several billion years from now, when it expands to become a red giant and then sheds most of its outer layers, leaving behind a hot core that contracts to form a dense white dwarf star.
A wind from the hot core rams into the ejected atmosphere, creating the shell-like filamentary structures seen with optical telescopes. The diffuse X-ray emission is caused by shock waves as the wind collides with the ejected atmosphere. The properties of the X-ray point sources in the center of about half of the planetary nebulas suggest that many central stars responsible for ejecting planetary nebulas have companion stars.
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“I don’t know anything with certainty, but seeing the stars makes me dream.”
―Vincent Van Gogh
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Anaurora happens when energetic electrically charged particles, like electrons, collide with atoms of gas as they accelerate along the Earth’s magnetic field lines in the upper atmosphere.
Those collisions cause the atoms to give off light. Auroras are a lot like neon signs, except that the conducting gas is in the Earth’s ionosphere instead of inside a glass tube.
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