Examlex
One of the nearest stars is Alpha Centauri,whose distance is 4.2 × 1016 m.How long does it take light to travel from Alpha Centauri to us?
Height In Plane
The measurement of an object's elevation or altitude in relation to a base level, typically in the context of aviation or topography.
Moon Illusion
The moon illusion is an optical illusion where the moon appears larger when it is close to the horizon than when it is higher in the sky, despite having the same actual size.
Horizon
The line at which the earth's surface and the sky appear to meet, or metaphorically, the limit of a person's knowledge, experience, or interest.
Elliptical
Having an oval shape or relating to an ellipse; also used metaphorically to describe speech or writing that is obscure or lacks completeness.
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