A solary eclipse is when the moon gets in front of the sun (black sun)
A lunary eclipse is when the moon is on the opposite side of the earth than the sun where there is no light what so ever (black moon)
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Ellipse * * * * * At right angles to the length, it would be a circle. Along the length it would be a rectangle. Only a diagonal cross section would be an ellipse.
An ellipse is a shape. it can be any color. You might as well ask about the color of a square.
Any ellipse is an oval shape. But all ovals are not all ellipses, some are nothing in particular.
Both foci of any ellipse are always in the same plane.If they're both at the same point, then the ellipse is a circle.
Holding the knife at different angles, you could cut a cylinder and get a circle, an ellipse, or a rectangle.