M82 is an irregular prototype starburst galaxy, whose centre is believed to be experiencing an episode of intense star formation. The red glow is from a superwind of ionised hydrogen gas, expanding out from the centre as a result of the combined winds of many individual stars.
ACAM instrument is a versatile optical imager and low-resolution spectrograph designed and built by ING. It is permanently mounted at a folded-Cassegrain focus of the William Herschel Telescope, adding more flexibility to the observational operation of the telescope. More information can be found at the ACAM home page.
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The Isaac Newton Group of Telescopes