by APOD Robot » Mon Jan 25, 2021 5:07 am
Southern Cross over Chilean Volcano
Explanation: Have you ever seen the Southern Cross? This famous four-star icon is best seen from Earth's Southern Hemisphere. The featured image was taken last month in
Chile and captures the
Southern Cross just to the left of erupting
Villarrica, one of the most active
volcanos in
our Solar System. Connecting the reddest Southern Cross star
Gacrux through the brightest star
Acrux points near the most southern location in the sky: the
South Celestial Pole (SCP), around which all southern stars appear to spin
as the Earth turns. In
modern times, no bright star resides near the SCP, unlike in the north where bright
Polaris now appears near the NCP.
Extending the Gacrux - Acrux line still further (from about four to about seven times their angular separation) leads near the
Small Magellanic Cloud, a bright satellite galaxy of our
Milky Way Galaxy. The
Southern Cross asterism dominates the
Crux constellation, a
deeper array of stars that includes four
Cepheid variable stars visible to the unaided eye. Just above the volcano in the image, and looking like a dark plume, is the
Coalsack Nebula, while the large red star-forming
Carina Nebula is visible on the upper left.
[url=https://apod.nasa.gov/apod/ap210125.html] [img]https://apod.nasa.gov/apod/calendar/S_210125.jpg[/img] [size=150]Southern Cross over Chilean Volcano[/size][/url]
[b] Explanation: [/b] Have you ever seen the Southern Cross? This famous four-star icon is best seen from Earth's Southern Hemisphere. The featured image was taken last month in [url=https://en.wikipedia.org/wiki/Chile]Chile[/url] and captures the [url=https://www.constellation-guide.com/the-southern-cross/]Southern Cross[/url] just to the left of erupting [url=https://youtu.be/gmZ1q9_Cdtg]Villarrica[/url], one of the most active [url=https://en.wikipedia.org/wiki/Villarrica_(volcano)]volcanos[/url] in [url=https://solarsystem.nasa.gov/solar-system/our-solar-system/overview/]our Solar System[/url]. Connecting the reddest Southern Cross star [url=https://en.wikipedia.org/wiki/Gacrux]Gacrux[/url] through the brightest star [url=https://en.wikipedia.org/wiki/Acrux] Acrux[/url] points near the most southern location in the sky: the [url=https://apod.nasa.gov/apod/ap210101.html]South Celestial Pole[/url] (SCP), around which all southern stars appear to spin [url=https://apod.nasa.gov/apod/ap200701.html]as the Earth turns[/url]. In [url=https://i.ytimg.com/vi/17PkUsTVa7g/maxresdefault.jpg]modern times[/url], no bright star resides near the SCP, unlike in the north where bright [url=https://apod.nasa.gov/apod/ap150602.html]Polaris[/url] now appears near the NCP. [url=https://en.wikipedia.org/wiki/Celestial_pole#/media/File:Pole01-eng.jpg]Extending the Gacrux - Acrux line[/url] still further (from about four to about seven times their angular separation) leads near the [url=https://youtu.be/ssQyxCijfr8]Small Magellanic Cloud[/url], a bright satellite galaxy of our [url=https://solarsystem.nasa.gov/resources/285/the-milky-way-galaxy/]Milky Way Galaxy[/url]. The [url=https://youtu.be/Bw9gLjEGJrw]Southern Cross[/url] [url=https://en.wikipedia.org/wiki/Asterism_(astronomy)]asterism[/url] dominates the [url=https://en.wikipedia.org/wiki/Crux]Crux constellation[/url], a [url=https://earthsky.org/favorite-star-patterns/the-southern-cross-signpost-of-southern-skies]deeper array of stars[/url] that includes four [url=https://youtu.be/QcChCeX2VrY]Cepheid variable stars[/url] visible to the unaided eye. Just above the volcano in the image, and looking like a dark plume, is the [url=https://en.wikipedia.org/wiki/Coalsack_Nebula]Coalsack Nebula[/url], while the large red star-forming [url=https://apod.nasa.gov/apod/ap200505.html]Carina[/url] Nebula is visible on the upper left.
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