StarTalk Radio

Dec 13 2019 808.7k

Science, pop culture and comedy collide on StarTalk Radio! Astrophysicist and Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities and scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! New episodes premiere Friday nights at 7pm ET.

Travels in Time
Jul 13 2009 50 mins  
Is time travel possible? Or has it already happened? Get ready to spend some time pondering time, because in this episode of StarTalk, host Neil deGrasse Tyson is joined by co-host J. Richard Gott, author of Time Travel in Einstein's Universe and an expert in exotic astrophysics. Join us as we explore time travel, black holes, and worm holes, and analyze some Hollywood time travel films in terms of their scientific accuracy. Rich enlightens us on the fact that time travel is mathematically possible, citing Einstein’s Theory of Special Relativity to explain the phenomenon. In fact, there’s some time travel going on in the recording studio when Rich explains that Neil is seeing him as he was 3 billionths of a second before…maybe solving the secret to looking younger? Next up on the space-time continuum is the question of whether gravity effects time travel. Rich tells us that on a planet like Mercury, whose gravitational pull from the Sun is so strong, time ticks slower. You’ll hear some discussion about the accuracy of the movie The Time Machine, and how building a time machine like they did, as long as it uses the mass of Jupiter, just may give us enough energy to travel forward in time to find out the results of the next election! Another way to travel through time may be to orbit a black hole, but Rich warns us against getting too close to the point of no return unless we want to be spaghettified. You’ll also hear a little about Hollywood’s take on time travel depicted in Back to the Future, as well as in Planet of the Apes, for which Rich suggests that the first clue that time travel had occurred should have been that the apes were speaking English. The episode gets even more interesting when Neil and Rich take phone calls from fans. They answer questions about the expansion of space, seeing back in time through modern telescopes, and how the fabric of space stretches faster than the speed of light. Investigate wormholes, curved spacetime, general relativity, and all that cosmic craziness. Even crazier, though, may be when Neil recalls a strange memory of being confused for Michael Jackson when he was a kid, sparking his curiosity about whether MJ could’ve traveled back in time to get his old nose back? Rich says that even though we can travel into the past, we can’t age in reverse. Ponder the Grandmother Paradox, and whether time travellers have the ability to change the past. Finally, a fan asks how the past, present, and future coincide with the continuum of time. Rich has plenty of answers, but we’ll leave you with his reference to Einstein: “time plays out like a movie.” So, to make the most of your movie, we encourage you to sit back, relax, and enjoy the show. NOTE: All-Access subscribers can listen to this entire episode commercial-free here: See for privacy information.

Summer Skies
Jul 06 2009 49 mins  
Have you ever wondered why the sky is blue? We have too, and so we’re giving you the long-awaited answer, along with more exploration into the mysterious celestial sphere up above. It’s above our heads every day, conveying its lightest and darkest moments, giving hints about the universe around us, and allowing us to learn by looking up…but are we really looking? In this episode of StarTalk, host Neil deGrasse Tyson is joined by co-host and comedian Lynne Koplitz to ponder the many questions, stories, legends, and phenomena of the sky. But first, we just can’t talk about the sky without “Bill Nye the Sky Guy.” We hear a little from Bill about Jupiter’s opposition to the Sun during summer, and the importance of stargazing, as he encourages us to make some time for the sky in our lives. Next on the horizon, Neil and Lynne dig through ancient legends of the night sky, as they invite us to imagine the sky as “Cave TV” before we had the real thing. Neil educates us on the meaning of the word “Planet” in ancient Greek, and Lynne discovers a mistake that may have been the reason all of her wishes on stars haven’t come true. You’ll also hear why marrying an astronomer means you’ll always know where they are at night…like a bartender. The second half of the show gets even more fascinating when “Astronomer Extraordinaire” and News 12 Meteorologist Joe Rao takes a seat. Joe, the ultimate sky expert, answers questions even Neil can’t answer concerning the sky during eclipses, hurricanes, rainbows, shooting stars, the brightest skies of summer, the white skies of winter, and everything in between. Joe also debunks the assumption that you must look away or even stay inside during a total eclipse, while highlighting that the moment of total eclipse is actually the only point when it is safe to look. He tells us about the Great American Eclipse on August 21st, 2017 (In fact, Joe was also our guest on “Cosmic Queries: The Great American Eclipse” the week before it happened!) And before we end, there’s revelation in the air (and a little precipitation) when we unearth the “Creepy Cloud”, A.K.A the Mammatus Cloud, one that was seen over CitiField (shown above) after a heavy thunderstorm that lit up the sky. Feeling enlightened? There’s more where that came from. Listen now for all of the “SkyTalk” you could ever wish for on a star. NOTE: All-Access subscribers can watch or listen to this entire episode commercial-free here: See for privacy information.

4.6 • 16 Ratings

juparaty Jan 11 2021

Gormysta Dec 26 2020
Excellent with deep insights

Graham Dec 12 2020

pope Sep 15 2020
I love how they make me excited about listening to really interesting topics.

Joey86 Sep 15 2020
Love the podcast I always learn something new.

iso Aug 27 2020
TRANSCRIPT Hello, and welcome to Luke’s English podcast – the podcast for learners of English. This is the very first podcast that I’ve done and it will be the first of many more podcasts that you will be able to download and listen to in the future, so because this is the first podcast, it’s a bit short, it’s shorter than the other ones will be and in this podcast basically I’m going to introduce myself to you so that you can get to know me a little bit anden I’m going to tell you about what

tommyboy Aug 18 2020
Lose the "comic" cohost, simply an interruptor with an annoying high-pitched voice...adds nothing to the show!

lwood the great Aug 11 2020
Neil is a genius. And funny too.

Carl_Mack Jul 08 2020
Great Podcast!

funkmastersolo Jun 21 2020
Tried to love this so hard, but I just can't. Constant interruptions of the guest speakers, forced comedy, a lot of time wasted on inane banter. And it's not the format, it's the execution. I appreciate the effort, the topics, the fact comedy is hard, the need to make this conent approachable for a wide audience, but I guess I'm just not the target demographic. After the Hubble Space Telescope episode on April 13, I just gave up. Love you guys for trying and I hope you keep keeping on.

lawlfactory May 28 2020
I just come back for the cosmic queries.

Mario A. May 22 2020
Love the podcast, I learn something new all the time

shotty May 21 2020
Continuous quality content

IsaacIsRaEl May 12 2020
One of the best episodes in Star Talk history. Love the fabric of space, kinetic vs potential "perspective" energy answer.

boolas Apr 13 2020
Quality content

Sean Downey Apr 12 2020
Anything StarTalk I love, just wish more shows often, I need my damn science!