A NASA illustration of Earth's night sky in 3.75 billion years, when the Andromeda galaxy and the Milky Way galaxy collide.
A NASA illustration of Earth's night sky in 3.75 billion years, when the Andromeda galaxy and the Milky Way galaxy collide.

Cosmic Queries – Our Galaxy and Beyond

In this illustration of Earth's night sky in 3.75 billion years, Andromeda (left) fills the field of view and begins to distort the Milky Way with tidal pull. Credit: NASA.

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About This Episode

Are you ready to learn the answers to some of the most intriguing questions about our galaxy and beyond? On this episode of StarTalk Radio, Neil deGrasse Tyson and comic co-host Sarah Rose Siskind answer fan-submitted questions on an eclectic collection of cosmic topics. You’ll get the answer to one of the most frequent questions we get asked: why is there no center of the universe? Learn about the expansion of the universe and how our inevitable collision course with the Andromeda galaxy overrides the expansion rate. (Don’t worry. You’ve got a few billion years before this galactic merger will take place.) Explore the history of how the Big Bang got its name and whether there’s a more appropriate name. Discover more about the remnants of the Big Bang, the Cosmic Microwave Background radiation. We also ponder déjà vu – could it be the intersection of two distinct timelines overlapping at an exact moment? Neil tells about a time when he had déjà vu and how the truth behind what was happening was both unexpected and surprisingly familiar. You’ll hear about the difference between a cemetery and a graveyard. Find out if E = mc2 functions the same when applied to dark matter and dark energy. Investigate whether there could be a universe hiding inside of a black hole.  Discover whether there’s a way to see the reverse side of the Big Dipper and Neil gives instructions on how to perform a cool light experiment to understand the geography of stars. Finally, Neil tells us why “Flat-Earthers” still exist and shares how he stays positive in a world in which an increasing number of  “science skeptics” are increasingly vocal with their indefensible assertions. 

NOTE: All-Access subscribers can watch or listen to this entire episode commercial-free here: Cosmic Queries – Our Galaxy and Beyond.

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