(click on image to enlarge)
From NASA/ ESA, April 13, 2020: This image depicts a swirling spiral galaxy named NGC 2906.
The blue speckles seen scattered across this galaxy are
massive young stars, which emit hot, blue-tinged radiation as they burn
through their fuel at an immense rate. The swathes of orange are a mix
of older stars that have swollen and cooled, and low-mass stars that
were never especially hot to begin with. Owing to their lower
temperatures, these stars emit a cooler, reddish, radiation.
This image of NGC 2906 was captured by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3, an instrument installed on Hubble in 2009 during the telescope’s fourth servicing mission. Hubble observed this galaxy on the hunt for fading light from recent, nearby occurrences of objects known as supernovae.
Credit: ESA/Hubble & NASA, A Filippenko
NOTE: Heads up! The 30th Anniversary of Hubble's launch is coming up on April 24!