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Hydrogen is the most ubiquitous element in the cosmos; from the biggest star to the smallest single cell organism, hydrogen is the universal connector. It is the most abundant element in the universe, and even in the human body.
This nebula is glowing with hydrogen gas, and filled with enormous stars, dust, and … a bubble? The “superbubble” in this nebula is about 250 light-years wide and scientists aren’t entirely sure why it formed the way it did. Stellar winds generated by massive stars in the interior of the “bubble” may have moved the ionized gas away from the center; another possibility is massive stars dying, resulting in huge explosions carving out the “bubble.”
@NASAHubble captured this nebula located about 170,000 light-years away, and is classified is as an emission nebula, which is a nebula whose gas has been energized or ionized by radiation of nearby stars. As the gas begins to cool from a higher-energy state to a lower-energy state, it emits energy which in turn causes the nebula to glow.
Credit: NASA, @EuropeanSpaceAgency, V. Ksoll and D. Gouliermis (Universität Heidelberg), et al.; Processing: Gladys Kober (NASA/Catholic University of America)
#NASA#Hubble#Space#AstroPhotography#Cosmos#Gaseous