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Viewed with a solar filter, the sun is the exact same size in the sky at all times, as seen from all locations on earth. On an equinox, it rises due east and sets due west everywhere on Earth, without exception. When there are sunspots, the same sunspots are visible everywhere on Earth, indicating that the same face of the sun is visible everywhere on Earth. All the phases of the moon, Venus and Mars are visible from anywhere on earth (where they can be seen), appearing to all observers in the same way at the same time. The sun also moves with a constant speed across the sky. The only sane conclusion from these observations is that the sun is a large distant object. If the sun is a distant object, then all the light from it is approximately parallel, yet we know that the sun's position in the sky varies as we move across the surface of the Earth, and the specific MANNER in which it varies indicates that observers in different locations are at angles to each other as they would be in the case of a spherical earth. This indicates that the Earth is spheroidial.