Big Picture Science for Aug. 04, 2025: Scoping Out the Universe

Big Picture Science: Scoping Out the Universe

Telescopes are like light buckets. The bigger the telescope, the more light collected for astronomers to observe. With recent advances in technology, amateur astronomers can join professionals for a chance to observe stellar nurseries and exoplanets many light-years away. But as our capabilities increase, so do the mysteries, including those around high-energy bursts coming from an otherwise unremarkable part of the universe. Understanding fast radio bursts could turn physics on its head.

From the Vera Rubin Telescope in Chile to the backyard instruments of amateur astronomers, we share what new things we might learn about stars, the Earth, exoplanets, and the potential for life on other worlds.

Guests:

• Clare Higgs – Astronomer working with the public outreach team for the Vera Rubin Observatory
• Franck Marchis – Senior astronomer and director of citizen science at the SETI Institute, chief science officer and co-founder of Unistellar
• Amanda Cook – Postdoctoral fellow at McGill University and member of the CHIME/FRB Collaboration

Download podcast at - https://bigpicturescience.org/episodes/scoping-out-the-universe

You can listen to this and other episodes at http://bigpicturescience.org/

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TED Talks: How a blind astronomer found a way to hear the stars - Wanda Diaz Merced

Description from the TED Talks Youtube site for this video published on Jul 13, 2016:


"Wanda Diaz Merced studies the light emitted by gamma-ray bursts, the most energetic events in the universe. When she lost her sight and was left without a way to do her science, she had a revelatory insight: the light curves she could no longer see could be translated into sound. Through sonification, she regained mastery over her work, and now she's advocating for a more inclusive scientific community. "Science is for everyone," she says. "It has to be available to everyone, because we are all natural explorers."

Video Source URL - https://youtu.be/-hY9QSdaReY

Original TED Talks Article 

Big Picture Science for Monday 06 July 2015 - Dogged Pursuit of Pluto

Big Picture Science - Dogged Pursuit of Pluto

Pluto is ready for its close up – but the near encounter during this historic flyby will last less than three minutes. Be ready for the action with our special New Horizons episode!

Hear from researchers who are Pluto rock stars: the astronomer who discovered two of Pluto’s five moons, the planetary scientist who coined the term “dwarf planet,” and the man who claims to have “killed Pluto.”

Find out how the New Horizons spacecraft will dodge rocks and other dangers as it approaches the planet and what we might learn about planet formation once we arrive. And why the battle over Pluto’s nomenclature continues.

Plus, Neil deGrasse Tyson reads his hate mail – from 3^rd graders.

Guests:

• Neil deGrasse Tyson – Astrophysicist, director of the Hayden Planetarium, New York City
• Alan Stern – Planetary scientist, Principal Investigator, New Horizons mission
• Mark Showalter – Senior research scientist, SETI Institute, New Horizons team member
• Mike Brown – Astronomer, California Institute of Technology

Permalink: http://radio.seti.org/episodes/Dogged_Pursuit_of_Pluto

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 15 June 2015 - It's All Relative

Big Picture Science - It's All Relative

A century ago, Albert Einstein rewrote our understanding of physics with his Theory of General Relativity. Our intuitive ideas about space, time, mass, and gravity turned out to be wrong.

Find out how this masterwork changed our understanding of how the universe works and why you can thank Einstein whenever you turn on your GPS.

Also, high-profile experiments looking for gravitational waves and for black holes will put the theories of the German genius to the test – will they pass?

And why the story of a box, a Geiger counter, and a zombie cat made Einstein and his friend Erwin Schrödinger uneasy about the quantum physics revolution.

Guests:

• Jeffrey Bennett – Astronomer, author of What Is Relativity?: An Intuitive Introduction to Einstein’s Ideas, and Why They Matter
• Beverly Berger – Theoretical physicist and the Secretary for the International Society on General Relativity and Gravitation
• Hiawatha Bray – Technology reporter, Boston Globe, author of You Are Here: From the Compass to GPS, the History and Future of How We Find Ourselves
• Paul Halpern – Physicist at the University of the Sciences in Philadelphia, author of Einstein’s Dice and Schrödinger’s Cat: How Two Great Minds Battled Quantum Randomness to Create a Unified Theory of Physics

Permalink: http://radio.seti.org/episodes/It_s_All_Relative

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 08 June 2015 - And To Space We Return

Big Picture Science - And To Space We Return

Earth may be the cradle of life, but our bodies are filled with materials cooked up billions of years ago in the scorching centers of stars. As Carl Sagan said, “We are all stardust.” We came from space, and some say it is to space we will return.

Discover an astronomer’s quest to track down remains of these ancient chemical kitchens. Plus, a scientist who says that it’s in our DNA to explore – and not just the nearby worlds of the solar system, but perhaps far beyond.

But would be still be human when we arrive? Hear what biological and cultural changes we might undergo in a multi-generational interstellar voyage.

Guests:

• Timothy Beers – Astronomer, University of Notre Dame
• Chris Impey – Astronomer, University of Arizona, author of Beyond: Our Future in Space
• Cameron Smith – Archaeologist, Portland State University

Permalink: http://radio.seti.org/episodes/And_To_Space_We_Return

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 01 June 2015 - Math’s Days are Numbered

Big Picture Science - Math’s Days are Numbered

ENCORE: Imagine a world without algebra. We can hear the sound of school children applauding. What practical use are parametric equations and polynomials, anyway? Even some scholars argue that algebra is the Latin of today, and should be dropped from the mandatory curriculum.

But why stop there? Maybe we should do away with math classes altogether.

An astronomer says he’d be out of work: we can all forget about understanding the origins of the universe, the cycles of the moon and how to communicate with alien life. Also, no math = no cybersecurity + hackers (who have taken math) will have the upper hand.

Also, without mathematics, you’ll laugh < you do now. The Simpsons creator Matt Groening has peppered his animated show with hidden math jokes.

And why mathematics = love.

Guests:

• Andrew Hacker – Professor of political science and mathematics at Queens College, City University of New York. His article, “Is Algebra Necessary?”, appeared in The New York Times in 2012.
• Bob Berman – Astronomy editor of The Old Farmer’s Almanac, the author of The Sun’s Heartbeat: And Other Stories from the Life of the Star That Powers Our Planet, and columnist for Astronomy Magazine. His article, “How Math Drives the Universe” is the cover story in the December 2013 issue.
• Simon Singh – Science writer, author of The Simpsons and Their Mathematical Secrets
• Rob Manning – Flight system chief engineer at the Jet Propulsion Lab, responsible for NASA’s Curiosity rover
• Edward Frenkel – Professor of mathematics at the University of California, Berkeley, author of Love and Math: The Heart of Hidden Reality. His article, “The Perils of Hacking Math,” is found on the online magazine, Slate.

This encore podcast was first released on December 2, 2013.

Permalink: http://radio.seti.org/episodes/Math_s_Days_Are_Numbered

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 11 May 2015 - A Fundy Thing Happened

Big Picture Science - A Fundy Thing Happened

Get ready for déjà vu as you listen to some of our favorite interviews from the past year. It’s our annual fundraising podcast. Come for the great interviews, stay for the great interviews. Lend us your support along the way.

What’s for dinner? Maybe Soylent. Made by … people! We do a taste test. Then meet your gut microbes. They control your health and even your mood.

Get tips on how to talk to aliens, why you should keep an eye on government surveillance, and the future of 3D printing human tissue. Also, why extraordinary beliefs persist – including Holocaust denial – despite the persistence of evidence to the contrary.

And, global perspective: why Ebola won’t be the next big pandemic but sea level rise could wipe out coasts along Florida and Thailand.

Plus, we imagine life hundreds of years ago for the renegades on the rough seas, and what the world would be like had the dinosaurs not gone extinct.

All this and more on a special Big Picture Science podcast!

Guests:

• Bill Miller – Physician and author of The Microcosm Within: Evolution and Extinction in the Hologenome
• Rob Rhinehart – CEO and founder of Soylent
• Brian Fagan – Emeritus professor of anthropology, University of California, Santa Barbara, author of The Attacking Ocean: The Past, Present, and Future of Rising Sea Levels
• David Quammen – Science journalist, contributing writer for National Geographic Magazine, author of Spillover: Animal Infections and the Next Human Pandemic. His Op Ed article about Ebola appeared in the New York Times.
• Shari Wells-Jensen – Professor of English, Bowling Green State University
• Susan Landau – Mathematician and engineer who works on cybersecurity, privacy and public policy at the Worchester Polytechnic Institute, author most recently of Surveillance or Security?: The Risks Posed by New Wiretapping Technologies
• Will Storr – Journalist, author of The Unpersuadables: Adventures with the Enemies of Science
• Ali Khademhosseini – Bioengineer, Harvard Medical School, Brigham and Woman’s Hospital

Permalink: http://radio.seti.org/episodes/A_Fundy_Thing_Happened

Big Picture Science for Monday 27 April 2015 - Invisible Worlds

Big Picture Science - Invisible Worlds

ENCORE: You can’t see it, but it’s there, whether an atom, a gravity wave, or the bottom of the ocean … but we have technology that allows us to detect what eludes our sight. When we do, whole worlds open up.

Without telescopes, asteroids become visible only three seconds before they slam into the Earth. Find out how we track them long before that happens. Also, could pulsars help us detect the gravity waves that Einstein’s theory predicts?

Plus, why string theory and parallel universes may remain just interesting ideas … the story of the woman who mapped the ocean floor … and why the disappearance of honeybees may change what you eat.

Guests:

• David Morrison – NASA space scientist and Director of the Carl Sagan Center at the SETI Institute
• May Berenbaum – Entomologist, University of Illinois
• Scott Ransom – Astronomer, National Radio Astronomy Observatory
• Lee Smolin – Theoretical physicist, Perimeter Institute of Theoretical Physics, Canada, author of Time Reborn: From the Crisis in Physics to the Future of the Universe
• Hali Felt – Author of Soundings: The Story of the Remarkable Woman Who Mapped the Ocean Floor

This encore podcast was first released on September 23, 2013

Permalink: http://radio.seti.org/episodes/Invisible_Worlds

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 30 March 2015 - Hidden History

Big Picture Science - Hidden History

Archeologists continue to hunt for the city of Atlantis, even though it may never have existed. But, what if it did? Its discovery would change ancient history. Sometimes when we dig around in the past, we can change our understanding of how we got to where we are.

We thought we had wrapped up the death of the dinosaurs: blame it on an asteroid. But evidence unearthed in Antarctica and elsewhere suggests the rock from space wasn’t the sole culprit.

Also, digging into our genetic past can turn up surprising – and sometimes uncomfortable truths – from ancestral origins to genes that code for disease. But do we always want to know?

Guests:

• Mark Adams – author, Meet Me in Atlantis: My Obsessive Quest to Find the Sunken City
• David Morrison – Senior scientist, NASA Ames Research Center
• Peter Ward – Paleontologist, University of Washington, author of A New History of Life: The Radical New Discoveries about the Origins and Evolution of Life on Earth
• Christine Kenneally – Journalist and author of The Invisible History of the Human Race: How DNA and History Shape Our Identities and Our Futures

Permalink: http://radio.seti.org/episodes/Hidden_History

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 09 March 2015 - Mars-Struck

Big Picture Science - Mars-Struck

You love to travel. But would you if doing so meant never coming home? The private company Mars One says it will land humans on the Red Planet by 2026, but is only offering passengers one-way tickets. Hundreds of thousands of people volunteered to go.

Meet a young woman who made the short list, and hear why she’s ready to be Mars-bound. Also, why microbes could be hiding in water trapped in the planet’s rocks. And, how a wetter, better Mars lost its atmosphere and became a dry and forbidding place.

Plus, why Kim Stanley Robinson, author of a famous trilogy about colonizing and terraforming Mars, thinks that the current timeline for going to the planet is unrealistic.

Guests:

• Laurel Kaye – A senior in the physics department at Duke University
• Alfonso Davila – Senior scientist at the SETI Institute
• Stephen Brecht – Physicist and president of the Bay Area Research Group
• Kim Stanley Robinson – Hugo Award-winning science Fiction author of the Mars trilogy: Red Mars (Mars Trilogy), Green Mars (Mars Trilogy), Blue Mars (Mars Trilogy)

Permalink: http://radio.seti.org/episodes/Mars_Struck

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 16 February 2015 - Sesquicentennial Science

Big Picture Science - Sesquicentennial Science

Today, scientists are familiar to us, but they weren’t always. Even the word “scientist” is relatively modern, dating from the Victorian Era.

And it is to that era we turn as we travel to the University of Notre Dame to celebrate the 150^th anniversary of its College of Science with a show recorded in front of a live audience.

Find out how the modern hunt for planets around other stars compares to our knowledge of the cosmos a century and a half ago. Also how faster computers have ushered in the realm of Big Data.

And a science historian describes us what major science frontiers were being crossed during the era of Charles Darwin and germ theory.

It’s then versus now on Sesquicentennial Science!

Recorded at the Eck Center at the University of Notre Dame, February 4th, 2015

Guests:

• Justin Crepp – Professor of physics, University of Notre Dame
• Nitesh Chawla – Professor of computer science and engineering and director of the Interdisciplinary Center for Network Sciences and Applications at Notre Dame
• John Durant – Historian of science, director of the MIT Museum

Permalink: http://radio.seti.org/episodes/Sesquicentennial_Science

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 19 January 2015 - Big Questions Somewhat Answered

Big Picture Science - Big Questions Somewhat Answered

Here are questions that give a cosmologist – and maybe even you – insomnia: What happened after the Big Bang? What is dark matter? Will dark energy tear the universe apart?

Let us help you catch those zzzzs. We’re going to provide answers to the biggest cosmic puzzlers of our time. Somewhat. Each question is the focus of new experiments that are either underway or in the queue.

Hear the latest results in the search for gravitational waves that would be evidence for cosmic inflation, as well as the hunt for dark matter and dark energy. And because these questions are bigger than big, we’ve enlisted cosmologist Sean Carroll as our guide to what these experiments might reveal and what it all means.

Guests:

• Sean Carroll – Cosmologist, California Institute of Technology
• Jamie Bock – Experimental cosmologist at the California Institute of Technology and NASA’s Jet Propulsion Laboratory and a member of the BICEP team
• Brendan Crill – Cosmologist at NASA’s Jet Propulsion Laboratory and member of the Planck collaboration
• Jeff Filippini – Post-doctoral Fellow, California Institute of Technology, assistant professor of physics at the University of Illinois and member of the Spider team
• Neil Gehrels – Astrophysicist at NASA’s Goddard Space Flight Center, project scientist for WFIRST

Permalink: http://radio.seti.org/episodes/Big_Questions_Somewhat_Answered

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 12 January 2015 - How to Talk to Aliens

Big Picture Science - How to Talk to Aliens

“Dear E.T. …” So far, so good. But now what? Writing is never easy, but what if your task was to craft a message to aliens living elsewhere in the universe, and your prose would represent all humankind? Got writer’s block yet?

What to say to the aliens was the focus of a recent conference in which participants shifted their attentions away from listening for extraterrestrial signals to transmitting some. In this show, we report on the “Communicating Across the Cosmos” conference held at the SETI Institute in December 2014.

Find out what scientists think we should say. Also, how archeology could help us craft messages to an unfamiliar culture. Plus, why journalists might be well-suited to writing the message. And, a response to Stephen Hawking’s warning that attempting to contact aliens is too dangerous.

Guests:

• Douglas Vakoch – Director of interstellar message composition, SETI Institute
• Paul Wason – Archaeologist, anthropologist and vice president for the life sciences and genetics program at the Templeton Foundation
• Al Harrison – Emeritus professor of psychology, University of California, Davis
• Morris Jones – Journalist and space analyst in Sydney, Australia
• Shari Wells-Jensen – Professor of English, Bowling Green State University

Permalink: http://radio.seti.org/episodes/How_to_Talk_to_Aliens

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 01 December 2014 - Long Live Longevity

Big Picture Science - Long Live Longevity

ENCORE: Here’s to a long life – which, on average, is longer today than it was a century ago. How much farther can we extend that ultimate finish line? Scientists are in hot pursuit of the secret to longer life.

The latest in aging studies and why there’s a silver lining for the silver-haired set: older people are happier. Also, what longevity means if you’re a tree. Plus, why civilizations need to stick around if we’re to make contact with E.T.

And, how our perception of time shifts as we age, and other tricks that clocks play on the mind.

Guests:

• Ted Anton – Professor of English, DePaul University, Chicago, author of The Longevity Seekers: Science, Business, and the Fountain of Youth
• Laura Carstensen – Psychologist, Stanford University, director of the Stanford Center on Longevity
• Peter Crane – Botanist, dean of the School of Forestry and Environmental studies, Yale University, and author of Ginkgo: The Tree That Time Forgot
• Frank Drake – Astronomer, SETI Institute
• Claudia Hammond – BBC broadcaster and author of Time Warped: Unlocking the Mysteries of Time Perception

This encore podcast was first released on July 29, 2014

Permalink: http://radio.seti.org/episodes/Long_Live_Longevity

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Distro Astro - Linux for Astronomers

Softpedia recently published an article regarding Distro Astro which is a Linux distribution designed for those with an interest in astronomy.

Here is the URL for the article - http://news.softpedia.com/news/Distro-Astro-3-0-Is-an-OS-Designed-For-People-Fascinated-by-Astronomy-Screenshot-Tour-465174.shtml

Softpedia download site - http://linux.softpedia.com/get/System/Operating-Systems/Linux-Distributions/Distro-Astro-102498.shtml

And here is the URL for the Distro Astro site - http://www.distroastro.org/

I haven't tried Distro Astro Linux yet, and it will be some time before I get a chance. If you happen to be using it or eventually start using it, then feel free to share you experiences in the comments section.

Cheers ~ Jim Cox

Big Picture Science for Monday 03 November 2014 - Sounds Abound

Big Picture Science - Sounds Abound

ENCORE: The world is a noisy place. But now we have a better idea what the fuss is about. Not only can we record sound, but our computers allow us to analyze it.

Bird sonograms reveal that our feathery friends give each other nicknames and share details about their emotional state. Meanwhile, hydrophones capture the sounds of dying icebergs, and let scientists separate natural sound from man-made in the briny deep.

Plus, native Ohio speakers help decipher what Neil Armstrong really said on that famous day. And, think your collection of 45 rpm records is impressive? Try feasting your ears on sound recorded before the Civil War.

Guests:

• Bob Dziak – Oceanographer, Hatfield Marine Science Center, Oregon State University, Program Manager, Acoustics Program, NOAA
• Michael Porter – Senior scientist of H.L.S. Research, La Jolla, California
• Patrick Feaster – Sound media historian at Indiana University
• Laura Dilley – Assistant professor in the Department of Communicative Sciences and Disorders, Michigan State University
• Jenny Papka – Co-director of Native Bird Connections
• Michael Webster – Professor of neurobiology and behavior, director of the Macaulay Library, Cornell University

This encore podcast was first released on August 5, 2103.

Permalink: http://radio.seti.org/episodes/Sounds_Abound

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 27 October 2014 - Skeptic Check: Friends Like These

Big Picture Science - Skeptic Check: Friends Like These

ENCORE: We love our family and friends, but sometimes their ideas about how the world works seem a little wacky. We asked BiPiSci listeners to share examples of what they can’t believe their loved-ones believe, no matter how much they hear rational explanations to the contrary. Then we asked some scientists about those beliefs, to get their take.

Discover whether newspaper ink causes cancer … if King Tut really did add a curse to his sarcophagus … the efficacy of examining your irises – iridology – to diagnose disease … and more!

Oh, and what about string theory? Is it falsifiable?

Guests:

• Steven Novella – Physician at Yale University, host of the podcast, “Skeptic’s Guide to the Universe”
• Matthew Hutson – Author of The 7 Laws of Magical Thinking: How Irrational Beliefs Keep Us Happy, Healthy, and Sane
• Brian Greene – Physicist, Columbia University, author of The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos and The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
• Guy Harrison – Author of 50 Popular Beliefs That People Think Are True and, most recently, 50 Simple Questions for Every Christian

This encore podcast was first released on March 25, 2013

Permalink: http://radio.seti.org/episodes/Skeptic_Check_Friends_Like_These

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 29 September 2014 - Land on the Run

Big Picture Science - Land on the Run

Hang on to your globe. One day it’ll be a collector’s item. The arrangement of continents you see today is not what it once was, nor what it will be tomorrow. Thank plate tectonics.

Now evidence suggests that the crowding together of all major land masses into one supercontinent – Pangaea, as it’s called – is a phenomenon that’s happened over and over during Earth’s history. And it will happen again. Meet our future supercontinent home, Amasia, and learn what it will look like.

Meanwhile, as California waits for the Big One, geologists discover that major earthquakes come in clusters. Also, our planet is not the only solar system body with tectonic activity. Icy Europa is a mover and shaker too.

And why is land in the western part of the U.S. literally rising up? Mystery solved!

Guests:

• John Dvorak – Geologist, author of Earthquake Storms: The Fascinating History and Volatile Future of the San Andreas Fault
• Adrian Borsa – Geophysicist, Scripps Institute of Oceanography, University of California, San Diego
• Ross Mitchell – Geologist and post-doctoral scholar at the California Institute of Technology
• Simon Kattenhorn – Structural geologist and a planetary geologist who did his work on Europa while at the University of Idaho

Permalink: http://radio.seti.org/episodes/Land_on_the_Run

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for Monday 15 September 2014 - Skeptic Check: Is It True?

Big Picture Science - Skeptic Check: Is It True?

We often hear fantastic scientific claims that would change everything if true. Such as the report that algae is growing on the outside of the International Space Station or that engineers have built a rocket that requires no propellant to accelerate. We examine news stories that seem too sensational to be valid, yet just might be – including whether a killer asteroid has Earth’s name on it.

Plus, a journalist investigates why people hold on to their beliefs even when the evidence is stacked hard against them – from skepticism about climate change to Holocaust denial. And, why professional skeptics are just as enamored with their beliefs as anyone else.

Guests:

• Lynn Rothschild – Evolutionary biologist and astrobiologist at NASA Ames Research Center
• Will Storr – Journalist, author of The Unpersuadables: Adventures with the Enemies of Science
• Steven Novella – Assistant professor, Yale University School of Medicine, host of the “Skeptic’s Guide to the Universe” podcast
• David Morrison – Director of the Carl Sagan Center for the Study of Life in the Universe, SETI Institute

Permalink: http://radio.seti.org/episodes/Skeptic_Check_Is_It_True_

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.

Big Picture Science for 09/08/14 - A Sudden Change in Planets

Big Picture Science - A Sudden Change in Planets

A planet is a planet is a planet. Unless it’s Pluto – then it’s a dwarf planet. But even then it’s a planet, according to experts. So what was behind the unpopular re-classification of Pluto by astronomers, and were they justified?

As the New Horizons spacecraft closes in on this small body, one planetary scientist says that this dwarf planet could be more typical of planets than Mars, Mercury, and Saturn. And that our solar system has not 8 or even 9 planets, but 900.

Also, meet a type of planet that’s surprisingly commonplace, although we don’t have one in our solar system: super Earths. Could they harbor life?

And the DAWN mission continues its visit to the two most massive residents of the asteroid belt: Vesta and Ceres. Discover what these proto-planets may reveal to us about the early solar system.

Guests:

• Alan Stern – Planetary scientist, Southwest Research Institute, Principal Investigator of the New Horizons mission
• Marc Rayman – DAWN Mission chief engineer and mission director
• David Stevenson – Professor of planetary science at CalTech
• Rebekah Dawson – Astronomer, postdoctoral fellow at the University of California, Berkeley
• David Eicher – Editor-in-chief, Astronomy Magazine

Permalink: http://radio.seti.org/episodes/A_Sudden_Change_in_Planets

You can listen to this and other episodes at http://radio.seti.org/, and be sure to check out Blog Picture Science, the companion blog to the radio show.