01604cgm a2200397 i 4500 2550819315 TxAuBib 20240906120000.0 r 240416|||||||||||||||||||||||||||||eng|u 15079990 Kanopy CaSfKAN eng rda CaSfKAN TxAuBib rda Unde rstanding the Universe: An Introduction to Astronomy, 2nd Edition. Episode 70 The Dark Side of Matter. [Kanopy]. The Great Courses, 2007. [San Francisco, California, USA : Kanopy Streaming, 2024. 1 online resource (streaming video file) (31 minutes) : digital, .flv file, sound. tdi rdacontent c rdamedia cr rdacarrier Title from title frames. Film. In Process Record. Alex Filippenko. Originally produced by The Great Courses in 2007. Until a few decades ago, astronomers thought that galaxies were composed primarily of stars. There is now strong evidence that most of the mass of galaxies may be invisible dark matter. Clusters of galaxies are also dominated by dark matter. Mode of access: World Wide Web. Science. Education. Astronomy. Instructional films. lcgft Education films. Filippenko, Alex, actor. The Great Courses (Firm). Kanopy (Firm). https://USERNAME.kanopy.com/node/14079991 https://www.kanopy.com/node/14079991/external-image