The 365 Days of Astronomy
The 365 Days of Astronomy podcast launched in 2009 as part of the International Year of Astronomy. This community podcast continues to bring you day after day of content across the years. Everyday, a new voice, helping you see the universe we share in a new way. This show is managed by Avivah Yamani, edited by Richard Drumm. This podcast is funded through Patreon.com/CosmoQuestX and produced out of the Planetary Science Institute.
Ask A Spaceman Ep. 282: What Happens When You Shine a Light on Nothing?
Light Up Empty Space!
Hosted by Dr. Paul M. Sutter.
How does the vacuum interact with light? Is it possible to use light to create something from nothing? And is "birefringence" a real word? I discuss these questions and more in today's Ask a Spaceman!
Support the show: http://www.patreon.com/pmsutter
All episodes: http://www.AskASpaceman.com
Watch on YouTube: http://www.youtube.com/PaulMSutter
Read a book: https://www.pmsutter.com/books
Keep those questions about space, science, as...
Astronomy Cast Ep. 805: Mission Tech Series - Gyroscopes & Servos
https://www.youtube.com/watch?v=mcn6f_PE14o
Spinney things!
Streamed live 18 Oct 2026.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Our journey through space exploration technology continues! Today we look at the things that spin: gyros, reaction wheels, servos. Newton's laws are large and in charge today as spinning has a very useful benefit when you're in weightlessness! Today we are going to understand the nemesis of space exploration missions everywhere, get to the bottom of this, how these things works, why they fail, and...
Travelers in the Night Eps. 385 & 386: New Aten & Silent ET
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From April 2026.
Today's 2 topics:
- Recently my Catalina Sky Survey teammates Carson Fuls and Greg Lenoard discovered an Aten asteroid which orbits the Sun once every 272 days and on a path that crosses the orbits of Venus and Earth a number of times each year. Atens account for only about 6% of the Earth approaching asteroids that asteroid hunters discover. They are relatively dim and...
AstroMan - G Is For Galileo
Galileo turned the telescope skyward and transformed astronomy, revealing lunar mountains, sunspots, Jupiter's moons, and a Universe far larger than imagined.
"ASTROMAN: the Dark Sky Guardian" is a podcast channel that aims to explore popular science in multiple disciplines and research on interdisciplinary approaches, such as sustainability, dark-sky protection, astrophotography, space exploration, astronomy innovation, inclusive science communication, and STEAM Education by integrating science and arts.
Exodus Chun-Long Sit, also known as the ASTROMAN, is a transmedia astronomy educator, popular science author, STEAM educator, and science communicator in Hong Kong. He is re...
Actual Astronomy - Saturn at Opposition
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. [email protected]
In this episode, we cover key visual observing highlights for Saturn, including prominent features like the Equatorial Band and Equatorial Zone visible in amateur telescope. We also look at historical transient phenomena, such as the massive, planet-encircling "Great White Spots" that erupt in the northern hemisphere roughly once every Saturnian year.
Alexio wrote:
Hi Chris and Shane,
I saw Saturn in your O...
EVSN - Luminous Kilonova Challenges Gamma-ray Burst Theories
From November 2020.
The brightest kilonova ever was detected and challenges current gamma-ray burst models. Plus, the history of water on both Venus and Mars, how radioactive elements may help habitability, and a little-known mass extinction event here on Earth. But wait! There's more… new images of the Perseus Cluster, a recaptured 1960s rocket booster, the shortest measurement of time, a treasure trove of copies of Principia, and SpaceX is certified to launch Crew-1 this weekend.
Perseus Cluster pix:
https://www.sci.news/astronomy/perseus-galaxy-cluster-radio-map-09213.html#google_vignette
We'v...
Guide To Space - Universe Today News: NASA Selects GIMLI to Search the Marius Lunar Pit for a Potential Lunar Base Site
https://www.universetoday.com/articles/nasa-selects-gimli-to-search-the-marius-lunar-pit-for-a-potential-lunar-base-site
Recorded by our editor, Richard Drumm.
Written by Matthew Williams.
Lava tubes on the Moon and Mars are some of the most fascinating and useful places we could explore. These are natural tunnels below the surface that could protect astronauts from radiation, provide a constant temperature, and could even be sealed off as a place for a habitat. Now, a new mission is under development called GIMLI that could use ground-penetrating radar to scan beneath the surface and map out the extent of a lunar cave network.<...
Awesome Astronomy - Extra: The Hubble Tuning Fork & Citizen Science
Paul Hill hosts solo!
Damien Phillips, John Wildridge and Dustin Ruoff produce.
In this podcast extra episode we talk to Dr. Karen Masters, Associate Professor of Physics and Astronomy at Haverford College, Pennsylvania about The Hubble Tuning Fork and Galaxy classification. But it's not only about that canonized galaxy classification system, it's also about how citizen science – astronomy done by absolutely anybody from their homes – can and does change the accepted wisdom and advance science.
Galaxy Zoo:
http://zoo1.galaxyzoo.org
Twelve Years of Galaxy Zoo:
Astronomy Cast Ep. 804: Mission Tech Series: Fairings, Docking & Airlocks
https://www.youtube.com/watch?v=GhkGOIAhBWc
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Streamed live on Oct 3, 2026.
Mission Tech Part 3.
Instead of sending up an entire space station for every mission, you can just send up a tiny can filled with astronauts. But that takes docking. And today we're gonna talk about what it takes to connect two spacecraft together. How to keep a cargo safe to get into orbit, and how to get in and out of your spacecraft without killing everyone!
Travelers in the Night Eps. 383 & 384: ET's Cigar & Dry Sands
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From April, 2026.
Today's 2 topics:
- In 2012 as it crossed the orbit of Neptune heading towards the Sun a small space rock was 250 times fainter than can be detected by the Hubble Space Telescope. Five years later, after it had rounded the Sun, it became visible in asteroid hunter's telescopes for about 16 days, as it streaked across our planet's orbit at 37 miles per second, as...
NOIRLab - First Magnetar Progenitor
Neutron stars, the compact remains of a massive star following a supernova explosion, are the densest matter in the Universe. Some neutron stars, known as magnetars, also claim the record for the strongest magnetic fields of any object. How magnetars, which are a mere 15 kilometers across, form and produce such colossal magnetic fields remains a mystery.
New observations by a team of astronomers, including NSF's NOIRLab's Dr. André-Nicolas Chené, may shed important light on the origin of these magnetic powerhouses. Using various telescopes around the globe, including the Canada-France-Hawai'i Telescope (CFHT) on Maunakea, the rese...
EVSN - Cloudy With a Chance of Brown Dwarfs: Terrestrial, Exo & Space Weather
From September 23, 2026.
This week we're doing a weather check.
No, really. Let's talk about the weather! All of them!
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
Every bit helps! Thank you!
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Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for...
Equatorial SkyGuide - October SkyGuide
Hosted by our Director, Avivah Yamani.
Explore October 2026's equatorial skies as we have Saturn at opposition, Mercury at dusk, Orionid meteors, and the Moon's celestial encounters.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
Every bit helps! Thank you!
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Do go visit http://www...
Awesome Astronomy - Baby Planet, the New Crater & the Decagon
October Part 1.
Paul Hill and Dr. Jenifer "Dr. Dust" Millard host.
Damien Phillips, John Wildridge and Dustin Ruoff produce.
We dive into autumn with a baby Planet, the SMILE mission, New weather on Saturn, a new crater on the moon, an update on Nancy Roman and a mission to Phobos. As well as our monthly sky and moon guide.
SMILE Mission Gif:
https://www.esa.int/Science_Exploration/Space_Science/Smile/Science_begins_for_Smile
We've added a new way to donate to 365 Days of As...
Ask A Spaceman Ep. 281: What Makes the Scattered Disk So Wild?
Solar System Badlands!
Hosted by Dr. Paul M. Sutter.
How did the scattered disk of the solar system form? What kins of strange objects roam those badlands? And what does it do to the rest of the solar system? I discuss these questions and more in today's Ask a Spaceman!
Support the show: http://www.patreon.com/pmsutter
All episodes: http://www.AskASpaceman.com
Watch on YouTube: http://www.youtube.com/PaulMSutter
Read a book: https://www.pmsutter.com/books
Keep th...
Astronomy Cast Ep. 803: Mission Tech Series: Engines & Stages
https://www.youtube.com/watch?v=87imhw2ljNU
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Streamed on October 3, 2026.
Today our series continues with our deep dive into rockets, their engines & stages. We fall into the tyranny of the rocket equation and discover what it takes to escape Earth's gravity and head off into deep space.
We removed all ads from the show. We need to get to 1,500 patrons to keep it this way. We need your support!
We've added a new wa...
Travelers in the Night Eps. 381 & 382: Red Dwarf Planets & Fireball II
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From March 2026.
Today's 2 topics:
- Astronomers continue to be delighted when they discover an Earth sized planet. Scientists were thus very disappointed when the red dwarf star hosting the nearest such planet, Proxima Centauri b some 4.2 light years away, turns out to have the nasty habit of emitting bursts of radiation which are likely to sterilize and/or remove the atmospheres of it's family...
Space Stories - Astronomy Words: Dwarf Planet
Hosted by our Director, Avivah Yamani.
Why is Pluto a dwarf planet? Discover how new findings changed the definition of a planet—and our perspective on the Solar System.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
Every bit helps! Thank you!
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Do go visit...
EVSN - All Things Solar System Evolution: Planet Formation, Composition & Asteroid Deflection
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
From February 20, 2020.
In today's episode we look at a variety of new results related to observing how planetary systems form, where planet ends up in solar system's (including in our own Jupiter's atmosphere!), and how rocks get flung at Earth even today.
Ice volcanoes videos etc.:
https://www.youtube.com/shorts/X3x9mOkN240
https://www.youtube.com/watch?v=HB27iJtxZrA
https://www.thehotelsaugatuck.com/blog/ice-volcanoes-and-ice-balls-oval-beach
We've added a new way to do...
Actual Astronomy - October Observer's Calendar
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. [email protected]
(Times in Eastern)
- Oct 1: Moon at perigee; Beta Cephei colorful double star - Oct 2: Venus stationary; 41 Aquarii colorful double star; R Fornacis carbon star - Oct 3: Last Quarter Moon (9:25); Gegenschein high in S at midnight; 3 Cephei colorful double star - Oct 4: Saturn at opposition; Lunar Curtis X; Sirius unaided in daylight; Jupiter double shadow transit (12:49 AM); M30 well placed - Oct 5: Mars occulted by Moon (NW Canada); Mercury 5° N...Awesome Astronomy - An American Astronomer in Cwmdu
September Part 2.
Dustin Ruoff (!!!) and Dr. Jenifer "Dr. Dust" Millard host.
Damien Phillips, John Wildridge and Dustin Ruoff produce.
Live from AstroCamp! It's Chatty McChatty time again!
Dustin pops over the pond for a visit to AstroCamp!
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
<...Cheap Astronomy - Dear CA Ep. 140: Objects & Objectives
Objective: objects!
Hosted by Steve Nerlich.
Dear Cheap Astronomy – How often does the solar system capture or eject things?
The first evidence that stellar systems might eject things were observations of rogue planets knocked out of their systems due to gravitational interactions and now populating interstellar space. For every rogue planet knocked out its system there are likely thousands of smaller objects also knocked out that are just too small for us to observe. We call this rogue population interstellar objects.
Dear Cheap Astronomy – What else is going on in th...
Astronomy Cast Ep. 802: Mission Tech Series: Rocket & Spacecraft 411
https://www.youtube.com/watch?v=hW_eLqrmjZ4
Streamed live on Sep 21, 2026
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Today we begin a new series on rockets and spacecraft, dealing with each of their components. It's a big job, so it'll take us a bunch of episodes to get through. Today let's do an introduction about what we're gonna talk about in this series: rockets from tip to tail, soup to nuts.
We've added a new way to donate to 365 Days of Astronomy to support e...
Travelers in the Night Eps. 379 & 380: Well Done & Odd Ball
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From March 2026.
Today's 2 topics:
- Once every 1,435 days , a 780 foot diameter space rock, 2017 TC1, that my Catalina Sky Survey teammate Carson Fuls discovered makes an annihilation defying close approach to our star. At it's nearest point to the Sun, Carson's well done space rock is traveling at an amazing 93 miles per second and receives 26 times the amount of solar radiation that heats the surface...
Guide To Space - Universe Today News: BepiColombo Successfully Begins Its Final Descent To Mercury
https://www.universetoday.com/articles/bepicolombo-successfully-begins-its-final-descent-to-mercury
Written by Andy Tomaswick - September 09, 2026.
Read by our editor, Richard Drumm.
The latest mission to the innermost planet in the solar system hit a milestone last week. After an eight year journey, BepiColombo finally separated from its propulsion stage to set itself up for an orbital insertion to Mercury.
Taking place on September 3rd, the separation, which is part of a much longer series of logistical steps over the next few months, seemed to go without a hitch. Because the two spacecraft wer...
EVSN - No Good, Very Bad News and Some Planetary Palate Cleansers
From September 16, 2026.
Join us as we bounce between the geology behind the recent landslide in Nepal and Tibet, the joy of Saturn's south pole forming a decagon, the frustration of both US and Russian space programs having launch capacity issues, and the good news of BepiColombo getting ready to enter Mercury's orbit.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your fr...
H'ad Astra Historia - Ep. 305: You're So Predictable
Hosted by Loretta Cannon.
Today's 'guest' is the planet Neptune. I'm telling the story of the discovery of Neptune 180 years ago in September, 1846. It was initially identified using mathematics rather than a telescope. This is a story of missed opportunities, undisclosed data, a bit of professional rivalry, and a controversy that some still argue today.
H'ad astra historia is the official podcast for the Historical Astronomy Division of the American Astronomical Society. We're here to share stories from and about the people who study the stars, planets, and the cosmos. We'll be hearing from...
Space Stories - Astronomy Words: Light Year
Hosted by our Director, Avivah Yamani.
A light-year measures distance, not time, but it also lets us see the past. Discover how light turns every telescope into a cosmic time machine.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
Every bit helps! Thank you!
------------------------------------
Do...
Ask A Spaceman Ep. 280: Wait, So We Can Steal Energy From Black Holes?
Black Hole Power!
Hosted by Dr. Paul M. Sutter.
What is frame dragging? How do we measure it? And how can we turn this into a method for extracting energy from rotating black holes? I discuss these questions and more in today's Ask a Spaceman!
Support the show: http://www.patreon.com/pmsutter
All episodes: http://www.AskASpaceman.com
Watch on YouTube: http://www.youtube.com/PaulMSutter
Read a book: https://www.pmsutter.com/books
Keep those questions about space, science, as...
Astronomy Cast Ep. 801: The Beginning & End of Everything - Part 2
https://www.youtube.com/watch?v=jFzHdB1nM9Y - With credits added.
Streamed live on Sep 7, 2026.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
This show is supported through people like you on Patreon.com/AstronomyCast
Today we do the sequel to our 2-part series. We jump to the end of the Universe, and all the major moments that will occur from now until the heat death of the Universe. The end of everything.
- The fate & future of the Milky Way
Travelers in the Night Eps. 377 & 378: Fission Rocket & Enormous Visitor
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From February 2026.
Today's 2 topics:
- To get an idea of the energy involved in a rocket launch, the NASA Saturn V, moon rocket, fully fueled on the launch pad contained the chemical energy of 2,000 pounds of TNT. This old technology could carry us to Mars and back on missions that would last years. To cut the mission time, the (radiation) risks, and the mass...
Astroman - F Is For Full Moon
Exodus talks about Moon phases.
"ASTROMAN: the Dark Sky Guardian" is a podcast channel that aims to explore popular science in multiple disciplines and research on interdisciplinary approaches, such as sustainability, dark-sky protection, astrophotography, space exploration, astronomy innovation, inclusive science communication, and STEAM Education by integrating science and arts.
Exodus Chun-Long Sit, also known as the ASTROMAN, is a transmedia astronomy educator, popular science author, STEAM educator, and science communicator in Hong Kong. He is recently the National Astronomy Education Coordinator (Chair of Hong Kong, China) of the International Astronomical Union and President o...
EVSN - Betelgeuse: Smaller & Closer Than Previously Thought… What?
From October 19, 2020.
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
Today's top story brings back our favorite red giant star, Betelgeuse. A new paper published in The Astrophysical Journal (ApJ) with lead author Dr. Meridith Joyce looks at Betelgeuse as a pulsating variable star and uses atmospheric physics to bring us new insights on what the red giant is up to.
This paper combines new observations with new computer models to derive the star's mass and size from its outward behavior in much the same way that one might derive the size of...
Actual Astronomy - Top Ten Techniques for Buying Used Telescope Gear
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. [email protected]
Top ten techniques for buying used telescope gear on Episode 552 of the Actual Astronomy podcast. I'm Chris and joining me is Shane. We are amateur astronomers who love looking up at the night sky and this podcast is for everyone who enjoys going out under the stars.
New vs. used:
Baked in discount Cheaper way to try different things Less cost to buy...Deep Astronomy - The Triangulum Galaxy: The Most Distant Naked Eye Object
https://www.youtube.com/watch?v=VmzJj2i81H0
Hosted by Tony Darnell.
From Nov 7, 2017.
Have you ever wondered what the most distant object we can see with our naked eyes is? The answer is The Triangulum Galaxy some three million light years from Earth. This galaxy, along with the Great Andromeda Galaxy will collide with our Milky Way in about four billion years. This galaxy collision will herald in a new era for our home galaxy The Milky Way. We will transform into an entirely new galaxy with billions more stars.
...
Cheap Astronomy - Dear CA # 139: Clearing the Neighborhood
Saving the world on a tight budget.
Hosted by Steve Nerlich.
Dear Cheap Astronomy – Can we clear all the PHOs from around Earth?
A key feature of Cheap Astronomy's CSOTM (Crash Shirt On The Moon) proposal is that the most readily available source of shirt to crash are near Earth asteroids and a small number of comets. This has the double benefit of putting all the raw materials in one place, plus you are clearing out potentially hazardous objects that could collide with Earth at some time in the future.
D...
Astronomy Cast Ep. 800: The Beginning & End of Everything - Part 1
https://www.youtube.com/watch?v=CDFCqCj0ofk
Streamed live on Sep 7, 2026.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
This show is supported through people like you on Patreon.com/AstronomyCast
To celebrate our 20th season, we thought we'd go back right to the beginning… of everything. Let's wind the clock back to the earliest moments of the Universe, where we'll measure time in fractions of a second. As the foundational laws of physics were laid down and we experience the repercussions to this day!
...
Travelers in the Night Eps. 375 & 376: Extraterrestrial Whales & Tiny Space Rock
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org
From February 2026.
Today's 2 topics:
- In an area which is about 1/400th of the entire sky, the NASA Kepler spacecraft has discovered 30 Earth like planets which are likely to have liquid water on their surfaces orbiting distant stars. These planets are likely to represent a tiny sample of the habitable planets which exist in the Milky Way. In spite of our efforts to find...
NOIRLab - The DESI Legacy Imaging Surveys
Hosted by Rob Starks.
The newest DESI Legacy Imaging Surveys map, 13 years in the making, covers three-quarters of the sky and catalogs nearly four billion objects. This treasure trove is available to all and contains stars, galaxies, supernovae, gravitational lenses, and much more. Two NSF NOIRLab facilities contributed data to the map: the U.S. National Science Foundation (NSF) Mayall telescope and the NSF Blanco telescope, equipped with the U.S. Department of Energy-fabricated DECam. In this podcast, Dr. John Moustakas discusses the surveys, the data and how it will impact future astronomical research.
...
EVSN - Newly Discovered Solar System Object is 'Farfarout'
From February 15, 2021.
A newly found object nearly four times farther out from the Sun than Pluto now holds the record for the farthest observed in our solar system. Plus, forming Super Earths, finding potentially habitable planets, jellyfish galaxies, the Crab Nebula, and this week's What's Up.
D100 in the Coma Cluster:
https://science.nasa.gov/asset/hubble/h-alpha-tail-of-d100/
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as...
