1. A star cluster in black and white vs. colour.

NASA, ESA and A. Nota (ESA/STScI, STScI/AURA) / Via spacetelescope.org

The Hubble Space Telescope’s cameras take individual images for different wavelengths of light and then astronomers combine them to create space images like these. The individual frames themselves aren’t in colour, but by combining images taken through different filters and giving each one a colour they can make the amazingly detailed space pictures we all know and love.

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