An image of the Veil Nebula taken by the Hubble Space Telescope

Nebula: Definition, location and variants

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

When telescopes weren’t as powerful as they are today, this term encompassed galaxies such as our neighbour Andromeda, which was often referred to as the “Andromeda nebula”. 

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