The fleet of ESA's space telescope has captured an image of the nearby Andromeda galaxy , also known as M31 , at different wavelengths . Most of these wavelengths are invisible to the naked eye .
Visible light reveals the various stars that shine in the galaxy of Andromeda , but it is only a small part of the spectrum of electromagnetic radiation . There are many different wavelengths that are invisible to us , but which are revealed by telescopes ESA .
The Planck spacecraft analyzes the spectrum of microwave . These show the particles of dust incredibly cold , a few tens of degrees above absolute zero . powder at a temperature slightly higher than is revealed the Herschel space telescope .
Il telescopio XMM-Newton detect wavelengths shorter than visible light , ultraviolet and X-rays . These beams show older stars , many nearing the end of their lives . monitoring the nucleus of the Andromeda 2002, XMM-Newton has revealed many variable stars , some of which have undergone large stellar explosions known .
Combining these observations , astronomers are able to follow the life cycle of stars.
ESA Press
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