However, unlike many of Hubble’s iconic images, the dataset contains star spectra – rainbow-like wavelengths of coloured light – and not images.
Spectra can reveal details about a star’s size, temperature, speed and chemistry.
Some of the release data includes massive blue stars in nearby dwarf galaxies.
In astronomy, the colour of a star is closely linked to its surface temperatures.
And the hotter a star is, the shorter the wavelength of light it emits.