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The 365 Days of Astronomy

365DaysOfAstronomy.org
Mars
NASA
Exoplanets
Moon
Milky Way
James Webb Space Telescope
Constellations
Jupiter
Near-Earth Objects
Planetary Science Institute
Meteorites
Betelgeuse
Artemis Program
Asteroids
Dark Matter
Comets
Messier Objects
Hubble Space Telescope
Apophis
Cosmology

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 o... more

PublishesDailyEpisodes300Founded18 years ago
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AstronomyScience

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Artwork for The 365 Days of Astronomy

Latest Episodes

October Part 2.

Paul Hill and Dr. Jenifer "Dr. Dust" Millard host.

Damien Phillips, John Wildridge and Dustin Ruoff produce.

Jeni gives us the low down on the Nancy Grace Roman Space Telescope in the first talk of Fall AstroCamp 2026.

We've ... more

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 Spa... more

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 t... more

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:

- Re... more

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Ask a Spaceman!Paul M. Sutter
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Space Nuts: Astronomy Insights & Cosmic DiscoveriesProfessor Fred Watson and Andrew Dunkley

Recent Guests

Dr. Al Grauer
Astronomy educator and guest on the program
Episode: Travelers in the Night Eps. 383 & 384: ET's Cigar & Dry Sands
André-Nicolas Chené
Assistant Astronomer at NOIRLab
NOIRLab
Episode: NOIRLab - First Magnetar Progenitor
Dr. Jeffrey Cargill
Senior Scientist, Planetary Science Institute
Planetary Science Institute
Episode: EVSN - No Good, Very Bad News and Some Planetary Palate Cleansers
Al Grauer
Host of Travelers in the Night segment
Travelers in the Night
Episode: Travelers in the Night Eps. 377 & 378: Fission Rocket & Enormous Visitor
Rose Matheny
Catalina Sky Survey teammate
Catalina Sky Survey
Episode: Travelers in the Night Eps. 375 & 376: Extraterrestrial Whales & Tiny Space Rock
John Moustakas
Professor at Siena University, astrophysics/astronomy researcher
Siena University
Episode: NOIRLab - The DESI Legacy Imaging Surveys
Kelly Blumenthal
Director of the IAU Office for Astronomy Outreach
International Astronomical Union (IAU)
Episode: Big Impact Astronomy - Inspiring the World Through Astronomy With Dr. Kelly Blumenthal
Kevin Grazier
NASA scientist; science advisor to Battlestar Galactica and Eureka
NASA/JPL
Episode: Astronomy Cast Ep. 53: Astronomy in Science Fiction
Dr. Vishnu Reddy
Astronomer, lead researcher on HO3 properties
University of Arizona Lunar and Planetary Laboratory
Episode: Travelers in the Night Eps. 373 & 374: Plant Companionship & Earth's Pet Rock

Hosts

Fraser Cain
Host of the show
Pamela Gay
Co-host providing astronomical explanations
Avivah Yamani
Host/Project management

Reviews

4.4 out of 5 stars from 596 ratings
  • Astronomy

    I thought this was about astronomy? I guess not.

    Apple Podcasts
    1
    horsepower man
    United States4 months ago
  • Gigling

    Stop the gigling!

    Apple Podcasts
    4
    Xanthan Gum
    Germany4 months ago
  • I don't care for all the tfake

    giggling and banter

    Podcast Addict
    1
    User1234
    10 months ago
  • Relaxing, Easy on the ears

    I love the story-telling feel to this podcast.

    Apple Podcasts
    5
    coolfactor
    Canadaa year ago
  • Unsubscribing Forever

    Pamela, please leave your political views out of a science podcast. You have lost a +5 year subscriber forever.

    Apple Podcasts
    1
    el_Bofo
    Canada2 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Feedback on host delivery varies, with some listeners desiring less political commentary and different vocal styles.
Listeners praise the show's approachable depth and clear explanations of complex topics.
Some listeners criticizing intro music and pacing have been noted in reviews.

Chart Rankings

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Talking Points

Recent interactions between the hosts and their guests.

NOIRLab - First Magnetar Progenitor
Q: What is a magnetar and why is it important to understand their formation?
A magnetar is a neutron star with an extremely strong magnetic field, providing a laboratory for physics under extreme conditions of quantum mechanics and relativity, and studying their formation helps trace how the heaviest stars live and die, influencing chemical evolution in the universe.
Cheap Astronomy - Dear CA Ep. 140: Objects & Objectives
Q: Dear Cheap Astronomy, What else is going on in the asteroid mining space?
There have been multiple venture-backed attempts to create an asteroid mining industry, with early efforts from Deep Space Industries and Planetary Resources, and more recent activity from AstroForge focusing on platinum-rich metals and space-based refining, though practical deployments and profitability remain uncertain.
Cheap Astronomy - Dear CA Ep. 140: Objects & Objectives
Q: Dear Cheap Astronomy, How often does the solar system capture or eject things?
The solar system does capture and eject small and large bodies with varying likelihoods; while capture events may occur, identifying a captured interstellar object is difficult without close-up data, and ejecta are observed as rogue planets or small bodies moving at high velocities away from the Sun.
NOIRLab - The DESI Legacy Imaging Surveys
Q: What types of research do these surveys enable?
They enable studies of dark energy through precise distance measurements to millions of objects, plus detailed investigations of nearby galaxies, their internal structures, and the Milky Way's formation history using the large, uniform dataset to build robust catalogs like the Siena Galaxy Atlas and to explore the lowest-metallicity galaxies as laboratories for early star formation.
NOIRLab - The DESI Legacy Imaging Surveys
Q: What telescopes and instruments contributed to these surveys and how were they conducted?
The northern survey used the 90Prime instrument on the Bok 2.5m telescope, observing blue and red bands, while the Mosaic camera on the Blanco 4m telescope contributed in the north as well. In the south, the DECam at CTIO near La Serena was deployed, enabling wide-area coverage and thus a near-complete sky map when combined with the northern data.

Audience Metrics

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Frequently Asked Questions About The 365 Days of Astronomy

What is The 365 Days of Astronomy about and what kind of topics does it cover?

The show features earnest, accessible discussions of current space science, astronomy instrumentation, and planetary exploration, with a strong emphasis on large-scale surveys, space missions, and observational techniques. Recent episodes highlight sky surveys and open data, lunar and asteroid science, meteorites, eclipses, and the LSST era, often pairing researchers with practical, upside-down-the-pizza ideas for future exploration. A notable strength is blending rigorous science with broad public outreach, citizen science, and practical viewing tips, making it approachable for both enthusiasts and professionals seeking to understand how cutting-edge data and missions shape the field.

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Which podcasts are similar to The 365 Days of Astronomy?

These podcasts share a similar audience with The 365 Days of Astronomy:

1. Universe Today Podcast
2. Astronomy Cast
3. SpaceTime with Stuart Gary
4. Ask a Spaceman!
5. Space Nuts: Astronomy Insights & Cosmic Discoveries

How many episodes of The 365 Days of Astronomy are there?

The 365 Days of Astronomy launched 18 years ago and published 300 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on The 365 Days of Astronomy?

Recent guests on The 365 Days of Astronomy include:

1. Dr. Al Grauer
2. André-Nicolas Chené
3. Dr. Jeffrey Cargill
4. Al Grauer
5. Rose Matheny
6. John Moustakas
7. Kelly Blumenthal
8. Kevin Grazier

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