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heliocentric parallax
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Heliocentric parallax
is always a great word to know.
So is red giant. Does it mean:
| a bright red supergiant star in the constellation Orion |
| a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue |
Dictionary.com Unabridged
noun
1.
the apparent displacement of an observed object due to a change in the position of the observer.
2.
Astronomy. the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due to its being observed from the earth instead of from the sun (annual parallax or heliocentric parallax). Compare parallactic ellipse.
3.
the difference between the view of an object as seen through the picture-taking lens of a camera and the view as seen through a separate viewfinder.
4.
an apparent change in the position of cross hairs as viewed through a telescope, when the focusing is imperfect.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Link To heliocentric parallax
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
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