Why Do Elliptical Galaxies Form Few New Stars?
Автор: Astronomy Made Simple
Загружено: 2025-12-02
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Have you ever wondered why elliptical galaxies, despite being massive, seem to form very few new stars? This video delves into the cosmic secrets behind this phenomenon, exploring the conditions and processes that lead to these majestic structures being dominated by older stellar populations.
In this exploration, we uncover key insights into the life cycle of stars within elliptical galaxies:
► Elliptical galaxies are often formed through the mergers of smaller galaxies, which can trigger bursts of star formation that quickly exhaust their gas reservoirs.
► The hot, diffuse gas found in elliptical galaxies is not conducive to cooling and collapsing to form new stars, unlike the colder, denser gas in spiral galaxies.
► The presence of powerful active galactic nuclei (AGN) or supermassive black holes in the centers of elliptical galaxies can heat and expel gas, preventing further star birth.
► Ellipticals are considered 'red and dead' galaxies because they primarily contain older, redder stars and lack the active star-forming regions seen in bluer spiral galaxies.
#EllipticalGalaxies, #StarFormation, #Astronomy, #Cosmology, #SpaceScience
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