SF Amateur Astronomers Lecture: Cosmic Shadow Theater (Randall Museum)
Briefly

The resulting galaxy shadows contain unique information about the invisible components of galaxies, such as their cold gas and dark matter, which hold clues to the nature of dark matter, dark energy, and the formation of galaxies.
Dr. Emmanuel Shaan will present some of the scientific efforts to reveal these galaxy silhouettes, using unprecedented cosmic microwave background experiments and galaxy surveys.
Read at Funcheap
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