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. 279: What Can We Actually Find on an Exoplanet?
Mapping Alien Worlds!
Hosted by Dr. Paul M. Sutter.
Just how hard are exoplanets observations? What kind of telescope will it take to find life? And how much information can we get out of a single pixel of light? 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. 53: Astronomy in Science Fiction
From September 10, 2007.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
This is a very different episode of Astronomy Cast. As we mentioned last week, Pamela recently attended the Dragon*Con science fiction convention in Atlanta, Georgia. While she was there, she participated in a special live edition of Astronomy Cast with special guest Dr. Kevin Frazier. Kevin is a NASA scientist, and the science consultant for the TV shows Battlestar Galactica and Eureka. He and Pamela work through physics and astronomy in popular science fiction. What they get right, and what they...
Travelers in the Night Eps. 373 & 374: Plant Companionship & Earth's Pet 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 January & February 2026.
Today's 2 topics:
- On Earth, human life is enabled by plants which provide us with calories, vitamins, fuel, medicines, and oxygen to breathe. In addition, recent scientific studies indicate that plant cultivation reduces anxiety and depression and has a positive influence on diabetes, heart disease, obesity, and longevity. Perhaps this is the reason that 80% of the cultivated plant species on planet...
Equatorial Sky Guide - September
Hosted by our Director, Avivah Yamani.
September's equatorial sky features Venus, Saturn, Mars, Jupiter, dark Milky Way nights, the September equinox, and a lunar occultation of Venus.
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...
EVSN - On Background: The Anatomy of a Comet
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
From September 1, 2026.
In this special episode, funded by the National Science Foundation, we're taking a break from the headlines to study the changing anatomy of a comet.
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!
...Actual Astronomy - The Observer's Calendar for September
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com
In Episode 549 of Actual Astronomy, hosts Chris and Shane present the Observer's Calendar for September 2026, highlighting key celestial events for amateur astronomers throughout the month. Highlights include the Sept 1 Aurigids meteor shower peak, a Venus-Spica conjunction on Sept 2, two regional star parties in early September, and a Moon occultation of Jupiter on Sept 8. Observing targets throughout the month feature various lunar features like the Lunar X and Straight W...
Awesome Astronomy - Holy Flipping Galaxies Batman!
September Part 1!
Paul Hill and Dr. Jenifer "Dr. Dust" Millard host.
Damien Phillips, John Wildridge and Dustin Ruoff produce.
So it turns out…
-The Milky Way may have done a back flip…
-News about the Swift telescope,
-NASA raiding its bare cupboards, and
-A super fast star.
-A nova in Sagitta!
Also…
-Our usual skyguide and wittering.
-Oh, and a song.
You will be full of antici……….pation!
We've added a new way to donate t...
Deep Astronomy - The Most Distant Galaxy Ever Measured
https://www.youtube.com/watch?v=frcLSXuzzyY
Hosted by Tony Darnell.
From October 24, 2010.
On Oct 19, 2010, astronomers announced the measurement of a redshift of 8.6 for one of the galaxies in the Ultra Deep Field. That corresponds to a galaxy seen just 600 million years after the Big Bang!
Here's the news release from ESO's website:
http://www.eso.org/public/news/eso1041/
The Nature paper:
https://www.eso.org/public/archives/releases/sciencepapers/eso1041/eso1041.pdf
We've added a new way to donate t...
Astronomy Cast Ep. 8: Meteor Showers. Yes, the Sky is Falling!
http://www.astronomycast.com/archive/
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
From October 30, 2006.
Dress warmly, gather some friends and family, and head outside to watch sand burn in the upper atmosphere. There's nothing like a good meteor shower. Fraser and Pamela explain this beautiful phenomenon: what causes them, the best storms and showers to watch for, and different types of meteors you might see.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Ju...
Travelers in the Night Eps. 371 & 372: Kiwi Nights & Close Ones
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 January, 2026.
Today's 2 topics:
- New Zealand's 4.5 million people are concentrated in three major population centers which to various degrees suffer from the modern plague of light pollution. However, most of New Zealand's large rural areas and land reserves, covering an area as large as the UK, have unpolluted natural night skies. A completely unique place to experience New Zealand's natural night sky is...
Space Stories - Syzygy, When Worlds Line Up
Hosted by our Director, Avivah Yamani.
What is a syzygy? Explore one of astronomy's strangest words and discover how the Sun, Earth, Moon, eclipses, transits, and tides are all connected by cosmic alignment.
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!
------------------------------------
...EVSN - After Hours #8: Making Moons & Getting Cratered With William K Hartmann
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
From August 13, 2026.
Across a long career, Dr. William Hartmann has done everything from innovating how the Moon was formed to founding the Planetary Science Institute to defining space art for a new generation; a generation that included host Pamela Gay. Tune in to hear about science, art, and how they can mix as individuals both make new discoveries, and the illustrations to accompany them!
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Ju...
Guide To Space - Are Aliens Watching Us & How Could We Hide? With Dr. David Kipping
https://www.youtube.com/watch?v=Rx1276dpHe4
From Jan 14, 2020.
Hosted by: Fraser Cain (@frasercain)
Once again, at the AAS Meeting in Hawaii, I got a chance to sit down with another astronomer to talk about their research. This time it was Dr. David Kipping from Columbia University's Cool World's Lab. We talked about how easy it'll be for aliens to know our planet is inhabited, and some ways we might be able to hide the evidence of our existence.
Dr. Kipping's channel:
https://www.youtube.com/channel/UCGHZpIpAWJQ-Jy...
Deep Astronomy - NASA's TESS Finishes First Year of Exoplanet Science Operations
https://www.youtube.com/watch?v=ivzbZRWkMUg
Hosted by Tony Darnell.
From Nov 12, 2019.
NASA's Transiting Exoplanet Survey Satellite has completed its first year of science operations and to show for it, NASA has released this amazing mosaic of the entire southern celestial hemisphere.
This video was written by NASA Goddard folks, you can watch the original here:
https://svs.gsfc.nasa.gov/13285
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visi...
Cheap Astronomy - Dear CA #138: In Space!
Some place in space.
Hosted by Steve Nerlich.
Dear Cheap Astronomy – What is the role of AI in space?
AI simulates human decision-making and finds most practical usage in the sorting and analysing of various kinds of data. So. you can feed an AI program pictures of galaxies and the classifications they fit into and then the AI can then identify and classify new ones that you feed it. It's kind of like how Galaxy Zoo used to work, except with Galaxy Zoo it was actual crowd-sourced people that did the work.
...
Astronomy Cast Ep. 101: Advanced Propulsion Systems
From August 11, 2008.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Last week we talked about rockets. How they work, how they go BOOM!, their limitations. And this week we're going to look at the future of propulsion systems. From the ion engines that are already working to explore the Solar System to the prototype solar sails to futuristic technologies like magnetic sails, and bussard ramjets. This is how we'll travel to other stars.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, a...
Travelers in the Night Eps. 369E & 370E: Night Vision & Double Comet
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 December 2025 & January 2026.
Today's 2 topics:
- Many people in our modern world rarely if ever experience night vision. To achieve this interesting state of sensory awareness you cannot look at your cell phone or any other source of bright light for 30 to 45 minutes. Your night vision comes about over time because the rod sensors in the retina of your eye undergo a chemical change...
Actual Astronomy - Messier Objects for August
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com
On Episode 547 of Actual Astronomy, hosts Chris and Shane guide listeners through observing an array of August Messier objects across the constellations Ophiuchus, Scorpius, and Sagittarius. The show details viewing techniques for globular and open clusters—highlighting targets like the egg-shaped globular M19, the historical Ptolemy's Cluster (M7), and the beginner-friendly M23. Additionally, they explore iconic Milky Way nebulae, including the active star-forming Lagoon Nebula (M8) and the ne...
Space Stories - The Fastest Star in the Milky Way
Hosted by our Director, Avivah Yamani.
Meet S301, the fastest known star in the Milky Way, racing around Sagittarius A* and offering astronomers a new way to measure the spin of our galaxy's supermassive black hole.
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!
...EVSN - After Hours: Doing Big Science With Light Tools & Guest Dr. Danny Jacobs
From July 30, 2026.
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
Science comes from many corners, and there is a need for both 600-m radio telescopes made on a great plain (Like the RATAN-600) and 60cm radio dishes built in a living room. In this After Hours, we talk with ASU professor Dr. Danny Jacobs (https://danielcjacobs.com)about how he engages students of all kinds in space sciences through educational tools like the cardboard radio telescope (https://astrochart.github.io), and in space telescope operations with the SPARCS small sat. (https://sparcs.asu.edu/)
...
Awesome Astronomy - The Eclipse & the Perseids
August Part 2.
Paul Hill hosts solo!
Damien Phillips, John Wildridge and Dustin Ruoff produce.
Join Paul in his Astronomy lair as he live sketches the Eclipse, chats to neighbours and talks Astronomy news while spotting Perseid meteors.
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!
Eve...
Ask A Spaceman Ep. 278: What's A Good Story About Chandrasekhar?
Physics under pressure!
Hosted by Dr. Paul M. Sutter.
What was the big deal about Chandrasekhar's discovery? Why did he meet so much resistance? How is his work tied to everything from supernovae to 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 sp...
Astronomy Cast Ep. 118: Sky Surveys
http://www.astronomycast.com/archive/
From December 12, 2008.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
In the old days, astronomers had to beg for telescope time. They'd put together a proposal, convince observatories to gather data for them, crunch that data and release the results. No telescope, no results. But everything's different now. Fleets of robotic telescopes constantly scan the skies, building up a vast database of raw data about the Universe. Anyone who wants can access the information through the Internet, download what they need to do real science...
Travelers in the Night Eps. 367 & 368: Moons of Florence & Roving Venus
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 December 2025.
Today's 2 topics:
- Dr. Lance Benner of NASA's Jet Propulsion Laboratory headed up a team of scientists who used the 70 meter antenna at NASA's Goldstone Deep Space Communications Complex to bounce RADAR beams off of the asteroid Florence as it made a close approach to Earth in September of 2017. The RADAR images these researchers obtained reveal that Florence consists of a 2.8 mile...
Astroman - E is for Eclipse
Today's episode is all about last Wednesday's total solar eclipse. But you have a partial lunar eclipse that's coming up that you can look forward to on August 27-28!
"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, an...
EVSN - After Hours: International Moon Day 2026 With guest Jekan Thanga
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
From July 22, 2026.
On July 20, the world celebrates International Moon Day. This UN designated holiday marks the anniversary of humanity's first landing on the Moon. The Apollo 11 landing in 1969 is now only a distant memory or a date from history for most people, but it is worth thinking about as the world prepares to return humans to the Moon in the coming decade. Joining us to discuss International Moon Day is Dr. Jekan Thanga, the head of the Space TREx Laboratory at the University of Arizona. Come learn how...
Guide To Space - Where Do Comets Come From? Exploring the Oort Cloud
https://www.youtube.com/watch?v=IQtdQ94jy8I
From Oct 17, 2017.
Hosted by: Fraser Cain (@frasercain)
Some comets orbit the Sun on a regular basis, but others come in from deep space, a region known as the Oort Cloud. What causes them to make this journey, and will we ever be able to explore the Oort Cloud?
Before I get into this episode, I want to remind everyone that it's been several decades since I've been able to enjoy a bright comet in the night sky. I've seen mind b...
Equatorial Sky Guide - August 2026
Hosted by our Director, Avivah Yamani.
Explore the August 2026 equatorial sky, from the Perseids and Milky Way to bright planets and the August 12 total solar eclipse.
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 go visit http://www.red...
Cheap Astronomy - Dear CA Ep. 137: Space Missions
Hosted by Steve Nerlich.
We are still out there.
Dear Cheap Astronomy – Why do some space missions last so long?
So, we're all familiar with the stories of the Mars rovers, Spirit and Opportunity, landing with mission lifespans of 90 days, that then went on to rove the surface of Mars for 15 years. And the Voyager probes, launched in 1977, were supposed to have five-year missions, which are now going on 47 years and counting. So, what's going on? Is NASA just crap at predicting mission lifetimes?
Dear Cheap Astronomy – How much faste...
Astronomy Cast Ep. 160: Eclipses
http://www.astronomycast.com/archive/
From October 19, 2009.
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
Every now and then, the Moon destroys the Sun. Okay, not destroys, covers. Well, not really covers, but from here on Earth, sitting inside the shadow of the Moon, that's what it sure looks like. These events are called eclipses, or more precisely, transits and occultations. They occur whenever one object passes in front of another from a 3rd perspective. They're beautiful and exciting, and deliver a tremendous amount of science as well.
Travelers in the Night Eps. 365E & 366E: Spotting Meteors & Mars Rocks
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 December 2025.
Today's 2 topics:
- Meteors, shooting stars, or falling stars are different names for the streaks of light in the night sky which are in reality the dying embers of tiny asteroids. These small interplanetary travelers were speeding along at between 7 and 44 miles per second when they entered the Earth's atmosphere. In space, they are called meteoroids and typically ranged in size from...
NOIRLab - The Start of the LSST
Hosted by Rob Sparks.
The 10-year Legacy Survey of Space and Time has officially started, marking the beginning of a new era in astronomy and astrophysics. Over the next ten years, Rubin will relentlessly observe the entire southern sky every few nights to create an ultra-wide, ultra-high-definition time-lapse record of our Universe. This long-awaited milestone is the culmination of years of effort by thousands of people around the world. In this podcast, Dr. Christina Williams and Dr. Yumi Choi describe the LSST and its science goals as well as what they are most excited about researching with...
EVSN - After Hours: Space Rocks Collected for Science With Guest Dr. Rhonda Stroud
From July 15, 2026.
Hosted by: Dr. Pamela L. Gay (@CosmoQuest)
Our solar system readily provides us with free samples of other worlds in the form of meteorites. The trick comes in first recognizing them, and then in understanding what science is locked in their minerals. One major center for collecting and studying these space rocks is Arizona State University's Buseck Center for Meteorite Studies which houses the Carleton B. Moore Meteorite Collection. Join us as we discuss the collection with Director Rhonda Stroud.
https://meteorites.asu.edu
We've added a n...
Actual Astronomy - The Observer's Calendar for August 2026
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com
Episode 545 of the Actual Astronomy podcast features hosts Chris and Shane discussing the observer's calendar and planetary visibility for August 2026. Throughout the month, skywatchers can track key planetary positions, including Venus in the morning sky and Jupiter rising around 3:00 AM. Notable astronomical highlights include the Perseid meteor shower, multiple lunar feature viewings, and a partial lunar eclipse accompanying the Full Moon on August 28th.
...
Ask A Spaceman Ep. 277: What's It Like to Travel Near the Speed of Light?
Life at lightspeed!
Hosted by Dr. Paul M. Sutter.
What does high-speed motion through the Universe do to your perspective? What is the Rindler horizon, and how does it appear? Would you get vaporized by a high-energy bath of radiation? 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
Ke...
Awesome Astronomy - August Part 2: Jodrell Bank Murder Club
Paul Hill and Dr. Jenifer "Dr. Dust" Millard host.
Damien Phillips, John Wildridge and Dustin Ruoff produce.
Angry episode where Paul and Jeni have their blood boiled by the decision to defund Jodrell Bank Observatory and the plans to launch over a million satellites, thousands of which will be brighter then the full moon!
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...
Astronomy Cast Ep. 85: Detectors
http://www.astronomycast.com/archive/
Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)
From April 21, 2008.
Our senses can only detect a fraction of the phenomena happening in the Universe. That's why scientists and engineers develop detectors, to let us see radiation and particles that we could never detect with our eyes and ears. This week we'll go through them all, so you can understand how we see what we can't see.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, a...
Travelers in the Night Eps. 363E & 364E: House Sized Space Rocks & Jupiter
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 November 2025.
Today's 2 topics:
- Throughout history small close approaching space rocks have been a part of our environment. Now, thanks to improved telescopes and cameras, asteroid hunters are routinely discovering these small asteroids as they pass closer than the Moon is to us. Since these tiny asteroids are only bright enough to detect for a few days out of their long, many month...
Space Stories - Betelgeuse Was Never Alone
Hosted by Avivah Yamani, our Director!
Was Betelgeuse ever truly alone? For over 100 years, astronomers searched for a hidden companion to Orion's famous red supergiant. Now, new observations from ESO's Very Large Telescope have revealed the clearest evidence yet that Betelgeuse has a stellar companion. Discover the science, the mystery, and why this finding is changing our understanding of one of the sky's most famous stars.
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 an...
EVSN - Betelgeuse Smaller Than Previously Calculated, Still A Mystery
From February 10, 2021.
Hosted by Dr. Pamela L. Gay.
Scientists collected fresh data on Orion's bright star Betelgeuse to try and understand this star that caused so much controversy. They found it's smaller than previously calculated, and last year's dimming was likely caused by dust, but it's also more complex than thought. Plus, galaxies, Earth's forests, ice on Mars, and Saturn's moon Rhea.
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...
