资讯

A solar eclipse is a rare and spectacular celestial event. It happens when the Sun, Moon, and Earth align so that the Moon passes between the Sun and our home planet, blocking some or all of the ...
A safe way to look at the partial solar eclipse is through something called a pinhole camera, which can easily be made at home. This projects the light from the Sun onto a piece of card inside a ...
On March 29, a partial solar eclipse will cause a dark shadow over ... will image a shadow being cast across Earth. The moon projects two kinds of shadows at all times. There's a large fuzzy ...