The Hubble Space Telescope delights with a cosmic Easter egg – 500 blue and red stars

In December 2023, the Hubble Space Telescope completed its largest program since its launch in 1990. Through this program, the telescope made observations of 500 individual stars over three years, and scientists are now ready to delve into this cosmic Easter egg of data.

The Hubble Telescope's comprehensive survey is called the Ultraviolet Heritage Library of Young Stars as Baseline Standards, or ULLYSES; ULLYSES' operators considered Hubble to be the only active telescope capable of accomplishing such a pioneering endeavor.

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