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STScI Public Lecture Series

The Composition of Galaxies: Looking Beyond the Stars

Presented by:  Lauren Corlies ( Johns Hopkins University)
Category: Education and Outreach   Duration: 1 hour and 45 minutes   Broadcast date: March 07, 2017
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Stunning visible light images of galaxies show us vast collections of stars, gas, and dust arrayed in great spiral and giant elliptical shapes. But astronomers know that there is much more to a galaxy than meets the eye. Their true scale reaches well beyond their visible extent and raises the question of whether a galaxy ever really ends. Dr. Corlies will discuss how we measure the faint outskirts of galaxies and whether the findings match our expectations. Through studies of Hubble Space Telescope observations and modern computer simulations we can probe the nature of galaxy formation and advance our understanding of their development.