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1,000 pc 3.09×10 16: Projection effect of the Radcliffe wave and Split linear structures , [32] between which the Sun is currently travelling. [33] Orion Arm: 3000 pc (length) 9.26×10 16: The spiral arm of the Milky Way Galaxy through which the Sun is currently travelling. Orbit of the Solar System: 17,200 pc 5.31×10 17
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The spiral arms are colored differently in order to highlight what structure belongs to which arm. H II regions are marked as dots colored in the same color as their spiral arm. They come in three sizes, measured by the excitation parameter U: small - U > 200 pc cm-2; medium - 200 > U > 110 pc cm-2; large - 110 > U > 70 pc cm-2; Date: 9 June ...
That’s only the apparent path if your presumption is that the earth and stars are stationary and the sun is revolving around the earth. It’s been quite a while since that was the first thought that entered one’s mind as the explanation for the sun’s movement across the sky, so that isn’t a description that quickly conveys the desired ...
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The point towards which the Earth in its solar orbit is directed at any given instant is known as the "apex of the Earth's way". [4] [5] From a vantage point above the north pole of either the Sun or Earth, Earth would appear to revolve in a counterclockwise direction around the Sun. From the same vantage point, both the Earth and the Sun would ...
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In this image the Near 3 kpc Arm is located near the center, below and to the right of the bulge. The Near 3 kpc Arm (formerly also called Expanding 3 kpc Arm or simply 3 kpc Arm ) was discovered in the 1950s by astronomer van Woerden and collaborators through 21-centimeter radio measurements of HI ( atomic hydrogen ).