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Because the sun can only shine on one half at a time. This is true enough, but not a complete reason. Mercury appears in half phase because its orbit is located between the Earth and the Sun. It is so close to the Sun as viewed from Earth that it is most easily seen and photographed when it is in it's most lateral position to the Sun; the position in which it is illuminated in half phase. As it moves around the orbital arc, the angular separation from the Sun's disk quickly becomes so small that viewing any other phases is difficult or impossible without very specialized equipment. The reflected light from Mercury is overwhelmed by the brightness of the Sun.
What else can I help you with?
When was Half a Photograph created?
Half a Photograph was created in 1952.
What type of mercury planet?
Mercury although it is almost always half melted, is a terrestrial planet.
Which 2 objects can the Hubble NOT photograph?
-- Mercury -- the Sun
What planet has half of Mercury's diameter?
Mercury is the smallest planet, so there isn't one with half the diameter.
Is Mercury always closer to the sun?
Mercury is always the closest planet to our sun.
Does a portrait always have to be drawn?
No a portrait can be a photograph. So long as it is of someone it is a portrait.
What planet appears to have only half an atmosphere?
Mercury
Would the gravity on the planet Mercury squash someone?
No. The gravity on Mercury is less than half that of Earth.
Is mercury half the size of earth?
According to NASA the size of Mercury is 2440 km radius. And it is almost a half the size of the Earth. Because Earth size is 6372 km radius. Meaning the Mercury is about 1/3 the size of the Earth.
What is the planet in the solar system that is half the size of earth?
Mercury
Can happiness be saved?
In a way. You can always remember happy times. You could also video or photograph events.
What is the perimeter of a photograph in centimeters when it's measures are 8 invhes by 10 inches?
Ninety-one and a half as near as dahmit.
