What is a fog?  Nebula: Definition, location and variants

What is a fog? Nebula: Definition, location and variants

Nebula is a Latin word meaning “cloud”, but in an astronomical context it refers to any celestial object that appears cloud-like when viewed through a telescope.

Since telescopes were not as powerful as they are today, this term included galaxies such as our neighbor Andromeda, often referred to as the “Andromeda Nebula”.

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