Uploaded December 2022 | Updated September 2026, 2 weeks ago

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Guest Speaker: Dr. Deanna Hooper, University of Helsinki
Summary: In this talk, Dr. Hopper discusses dark matter and dark energy and how cosmologists figured out that there had to be both dark matter and dark energy to explain what astronomers were observing. In a clear and simple manner, Dr. Hopper explains these complex concepts so that anyone can understand them. Cosmologists utilize the Cosmic Microwave Background (CMB) to determine the amount of regular matter, dark matter, and dark energy in the universe. They also use galaxy rotation curves and gravitational lensing to deduct the existence of dark matter and dark energy. This is a wonderful talk about helping you understand these concepts.

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Chapters
0:00 Introduction
3:17 Dark Matter past
6:55 Dark Energy past
13:53 What we know today
23:35 Dark Matter evidence
30:10 Dark Matter what we know
35:02 Dark Energy evidence
40:05 Darak energy what we know
46:08 What we hope to learn
52:43 Summary and Q & A


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#astrophotography
#deepsky
#astro
#astronomy
#cosmology