a blood moon is popularly used to describe a total lunar eclipse, when earth casts its shadow on a full moon & eclipses it, the moon can get a red glow + a total lunar eclipse is when earth eclipses a full moon
Cosmos is a Greek word for the order of the universe. It is, in a way, the opposite of Chaos. It implies the deep interconnectedness of all things. It conveys awe for the intricate and subtle way in which the universe is put together.
A comet’s tail is made as it nears the Sun and begins to melt. A vast plume of gas is thrown millions of kilometres across and is blown out behind by the solar wind. The tail is what you see, shining as the sunlight catches it