The 365 Days of Astronomy

https://www.youtube.com/watch?v=-Alz4UXGqLk

From March 8, 2017.

In just a few months, NASA's Cassini spacecraft is going to die, crashing into the planet Saturn. Let's look back across the mission's history. What were the highlights? What did we learn?

Team: Fraser Cain - @fcain / frasercain@gmail.com

Karla Thompson - @karlaii

Chad Weber - weber.chad@gmail.com

Ask me my favorite object in the Solar System, especially to see through a telescope, and my answer is always the same: Sa...

A podcast about rocks, big and small.

Dear Cheap Astronomy – What's Psyche really like?

Psyche is an asteroid in the asteroid belt and apparently a very metal rich one, which makes it a prospecting target for budding asteroid miners. Pysche is also a spacecraft, launched on October 13, 2023. We're recording this episode about one month after launch when it's already over 15 million km from Earth – and its destination? Yep, Psyche – the asteroid.

Dear Cheap Astronomy – How is Mars Sample Return mission going?

Here at Cheap Astronomy we've often said that landing o...

https://www.youtube.com/watch?v=d7FAg_AYXaw

From April 14, 2025.

Astronomers using the JWST have made direct observations of the black hole at the center of our galaxy: Sagittarius A*.  These observations are possible because the Webb Space Telescope can peer through the dust at the center of our galaxy using infrared light.  These observations surprised astronomers.

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...

https://www.youtube.com/watch?v=PpZRjII8qkc

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed live on Feb 2, 2026.

One long standing mystery in astronomy were the quasars. Incomprehensible energy blasting out of a point-like source, billions of light years away. We now know these are actively feeding supermassive black holes, which can turn off and on in a startlingly short period of time. Today: When black holes awaken! Our Universe is filled with sleeping monsters. And sometimes, whether we want it or not, they wake up hungry. In...

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 June, 2025.

Today's 2 topics:

- In the search for life on Mars, Europa, Titan, and elsewhere in the universe astro-biologists are scouring the Earth for creatures tough enough to flourish under really difficult conditions. So far the leading species are the Tardigrades commonly known as water bears or moss piglets.

- Data are consistent with the hypothesis that the planet K2-18...

Hosted by Avivah Yamani, our Director.

February 2026 is packed for stargazers at the equator, with a dusk-time planet parade, dark New Moon skies for astrophotography, and the year's first "Ring of Fire" annular solar eclipse on February 17 (visible from Antarctica). Catch beautiful Moon pairings with Antares, Saturn, the Pleiades, and Jupiter, and join the Globe at Night campaign to help measure light pollution in your area.

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...

From January 28, 2026.

In this episode we look at highlights from the latest American Astronomical Society Meeting. An accidental theme came out: with each new telescope and each improved instrument we can look more closely at our Universe - we can and do learn more and understand more even about the things we thought we knew best. In this episode, Rubin Observatory brings rapidly rotating asteroids, and JWST peers at objects thriving in the first 2 billion years of our universe. Observatory after observatory brings us new science.

We've added a new way to donate t...

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. actualastronomy@gmail.com

This month we talk about the Moon occulting Regulus, Saturn and Neptune pairing up while Mercury is visible in the evening sky and occulted by the Moon for some. The Zodiacal light also becomes visible in February and we give you the details on seeing lunar features and some of the best Deep Sky objects plus the Carbon and Double Stars to see at this month.

Feb 1 - Full Moon - 26 Aur Coulorful Double

Feb 2 - Regulus o...

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

Damien Phillips, John Wildridge and Dustin Ruoff produce.

We discuss the British Government's vandalism of UK physics and astronomy. In better news we celebrate the refunding of NASA and the up coming Artemis II mission… will Paul finally get excited?

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 s...

Hosted by Dr. Paul M. Sutter.

What is the weak equivalency principle? How was antimatter discovered and why is it the perfect thing to put gravity to the test? What did the CERN experiment discover? 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, astronomy, as...

https://www.youtube.com/watch?v=sIVunut4Dgk

Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest )

Streamed live on Jan 26, 2026.

We live in a cosmic shooting gallery. It's not a matter of "if" but "when"! Dinosaurs, blah, blah, blah. You know the drill. But seriously, folks, it's raining rocks & ice out there! How seriously should we take it? What happens when a variety of different objects hit the Earth? Different kinds of objects affect Earth very differently when they impact. Let's discuss what makes an impactor more or less dangerous.<...

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 May & June, 2025.

Today's 2 topics:

- In a recent paper published in Nature Astronomy entitled "Surveys of the scientific community on the existence of extraterrestrial life" Dr. Peter Vickers and his team of 10 co-authors report the results  of their survey of the lead authors for the past 10 years in the top three astro-biological journals. These researchers sought to measure if their sample group of sc...

Hosted by our Director, Avivah Yamani.

Earth swings closest to the Sun at perihelion and farthest at aphelion, words that apply to every planet orbiting the Sun. Learn how Kepler's laws reveal an elliptical orbit, why Earth moves faster at perihelion, and why seasons come from Earth's tilt, not distance.

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 se...

From February 8, 2021.

A new theory has been proposed that could answer the question of what causes recurring landslides on Mars: small-scale ice melting just below the surface may leave the regolith vulnerable to wind. Plus, a look at some of Earth's ancient climate changes, a gamma-ray source, puffy galaxies, and this week's What's Up.

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 wi...

https://www.youtube.com/watch?v=lxgdcG_NQyA

Hosted by Fraser Cain. And a happy robin.

From May 3, 2018.

The European Space Agency just dropped an enormous amount of data onto the scientific community. The location and position of 1.7 billion stars in the Milky Way. 

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 Pat...

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

Damien Phillips, John Wildridge and Dustin Ruoff produce.

So it looks like Low Earth Orbit is not just crowded but a disaster waiting to happen trapping humanity on this planet for a very long time…

https://www.esa.int/Space_Safety/Space_Debris/Space_debris_by_the_numbers

https://arxiv.org/abs/2512.09643

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/365DaysO...

Still looking.

Hosted by Steve Nerlich.

Dear Cheap Astronomy – Is there anything new on Planet 9?

Well, not really and there is some growing skepticism about whether it's really there. Nonetheless, its original proponents, Mike Brown and Konstantin Batygin, still stick to their guns on the matter, though both agree Planet 9's existence must be considered speculative until it is actually observed.

Dear Cheap Astronomy – Is Nemesis really out there?

Continuing the theme of hypothetical solar system bodies, Nemesis was proposed to be a small, dim and hence diffi...

From October 23, 2008.

Hosted by Fraser Cain & Dr. Pamela Gay.

Everyone loves a theme. And this week we've collected together some of your questions about relativity. More light speed spacecraft, twin paradoxes, and the mixing up of gravity, time and mass. If you've got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we'll try to tackle it for a future show. Please include your location and a way to pronounce your name.

- What would happen if you're traveling close to light speed through t...

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 May, 2025.

Today's 2 topics:

- NASA's Europa Clipper was launched October 14, 2024 on a mission to conduct a detailed study of Jupiter's Moon Europa.  The space craft will travel some 1.8 billion miles and should reach Jupiter in April 2030.  This mission will begin to tell us if life as we know it can occur relatively close to home.

- Since there is a world wi...

Hosted by Dr. Jacinta Delhaize, Dr. Tshiamiso Makwela, Dr. Daniel Cunnama & François Campher.

At long last…we're back!!! The Cosmic Savannah is entering an exciting new era as we transition into a video podcast! In this episode, we kick off that journey and invite you to join us as we venture even deeper into the cosmic ocean—exploring the universe, sharing new perspectives, and connecting with the people who bring astronomy to life. Exciting times lie ahead, and we're thrilled to have you along for the ride.

In this episode, the team also r...

From April 28, 2022.

An analysis of images taken by the Spirit rover of olivine-rich rocks in Gusev crater has revealed a much more violent volcanic origin than originally thought and one that likely occurred early in Mars's history. Plus, balloon science, more Mars, more volcanoes, pretty Hubble images, and What's Up (a supernova!).

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...

https://spacescoop.org/en/scoops/2529/a-thrilling-radio-message-from-a-nearby-red-star/

Hosted by our editor, Richard Drumm.

About 130 light-years away from Earth there's an early M-Dwarf star called StKM 1-1262.

Let's call it 1262… It's actually a common, ordinary star, the most common of stars, in fact. It's a red dwarf! They're also called 'Flare Stars' because they flare up frequently. Tempestuous little buggers! Not long ago astronomers got an exciting radio message of a sort from this star. 

What did the message say? Just listen!

We've added a new way to donate to 3...

Paul Hill, Ralph Wilkins and Dr. Jenifer "Dr. Dust" Millard host. 

Damien Phillips, John Wildridge and Dustin Ruoff produce.

It's time for our annual review of the year, a look forward to next year and of course the Panto!…and the return of an old face!

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 Patre...

Hosted by Dr. Paul M. Sutter.

How does the double-slit experiment work? What does it teach us about reality and measurement if we try to mess with the experiment after it's already started? How does quantum complementarity guide us with how to think about it? 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

https://www.youtube.com/watch?v=rTFbrCIkrfU

Streamed live on Jan 12, 2026.

Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest )

Humans live short lives, and from our perspective the seasons are something that come and go with perfect regularity. But astronomers know the terrible truth! And that there are cycles that slowly shift over tens of thousands of years, shifting the cycles and the Earth's climate. Today we'll talk about the Milankovich Cycles! The Earth's orbit, tilt, and other physical attributes aren't quite as constant as you might think! Come learn...

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 May 2025.

Today's 2 topics:

- My Catalina Sky Survey teammate Hannes Gröller was asteroid hunting in the constellation of Ursa Major with the University of Arizona 90 inch Bok telescope on Kitt Peak when he discovered a faint moving object surrounded by a tiny gas and dust cloud called a coma. May 19, 2028 comet C/2025 D1  (Groeller) reaches its closest point to the Sun some 14.1 ti...

Dive into the wonders of the lunar eclipse! ASTROMAN breaks down the 2026 total "Blood Moon" in Asia, offering tips for skywatchers and the science behind the shadow.

"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 CL Sit, also known as the ASTROMAN, is a transmedia astronomy educator, popular science author, STEAM educator, and science co...

From January 7, 2026.

In this episode, we're pleased to say we get to focus on science, as we bring you hot Jupiters, a tear-drop shaped Jupiter massed… something…? - and news of objects getting torn apart and other objects getting merged together as our universe lights up our night.

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 Patreo...

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. actualastronomy@gmail.com

In this podcast (Episode 519) we talk with a special guest & long-time listener Clint Reading (from Nebraska, formerly from Idaho) about his astro-tourism trips to OzSky which is a biannual event for amateur astronomers from the northern hemisphere to have the opportunity to see the southern skies. We learn how to prepare for an astronomy trip to Australia, what to bring to get the most out of a week under the southern stars and how you can take advantage of these events. This is...

Hosted by Steve Nerlich.

Well… Cheap Astronomy confirms some mysteries are still mysteries!

Dear Cheap Astronomy – Is warp drive looking any more possible?

Well, no, insofar as it looks about as possible as it ever did, which is to say, it's probably

impossible, but at the same time, it's best to never say never. As we've covered before, the

nature of space-time precludes the possibility of faster than light travel simply because light

travels as fast as it is possible to travel in space-time.

Dea...

https://www.youtube.com/watch?v=WvdZpZuz-WQ

Hosted by Tony Darnell.

From  Feb 13, 2025.

The deep fields taken by the Hubble Space Telescope are now legendary.  Astronomers used the most complicate and expensive instrument ever put into space to stare at nothing, a very risky move, but one that paid off.

What happened when we did the same thing with the James Webb Space Telescope?

We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. 

Just visit...

https://www.youtube.com/watch?v=cySk8O0iVjU

Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest )

Streamed live on Jan 5, 2026.

Freeman Dyson asked a fascinating question. What would it look like if a civilization was using all the energy coming from their star? And what form would this take? This introduced the concept of a Dyson Sphere, or more realistically, a Dyson Swarm surrounding a star. But if you're skeptical about the concept, you're in good company.

This show is supported through people like you o...

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 2025.

Today's 2 topics:

- On a single February night my Catalina Sky Survey teammate Jacqui Fazekas reported  the discovery of 5 Earth approaching objects using our small but mighty Schmidt telescope on Mt. Bigelow, Arizona.Rest assured that on any given night there are asteroid hunters on the look out for seriously dangerous space rocks.

- One little known and infrequently observed p...

As part of the NSF–DOE Vera C. Rubin Observatory First Look event in June 2025, Rubin announced that it had observed thousands of asteroids cruising about our Solar System, about 1,900 of which have been confirmed as never-before-seen. Within the flurry, a team of astronomers has discovered 19 super- and ultra-fast-rotating asteroids. One of these is the fastest-spinning asteroid larger than 500 meters (0.3 miles) ever found. In this podcast, Dr. Sarah Greenstreet discusses these fast spinning asteroids and what makes the Rubin Observatory ideal for discovering these types of objects.

Bios: 

- Rob Sparks is in the...

From December 25, 2025.

In this week's episode, we look at planets younger than fossils, celebrate relativity repeatedly working as expected, and peer at previously only theorized 1st generation stars using JWST. We celebrate the completion of the construction of the Nancy Grace Roman Space Telescope, and look in on all the recent launches. All this and more is coming to you right here, and right now!

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 do...

Hosted by Avivah Yamani.

January 2026 is a packed month for equatorial skywatchers! Catch the Quadrantid meteor shower peak on the new year and Jupiter steals the spotlight at opposition.

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 vis...

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

Damien Phillips, John Wildridge and Dustin Ruoff produce.

So it turns out Soundgarden nailed astrophysics in 1994. We explore latest thinking on Little Red Dots, Globular Custers, oldest supernovae, No-ceans on Titan as well as our monthly skyguide and moon guide.

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...

What is causal determinism? What are some of the ways that physics can permit free will? What does emergence have to do with all of this? 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, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TI...

https://www.youtube.com/watch?v=uijiic8crBQ

Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest )

Streamed live on Dec 29, 2025.

How big can a star get? This is a calculation made by one of the original pioneers of modern astronomy, Sir Arthur Eddington. And it's named after him, the Eddington Limit. Now, astronomers are finding examples of giant black holes early in the Universe, calling into question some of Eddington's assumptions. Let's explore this fascinating concept! Why are stars sphere-ish? Why do blackholes not eat everything? Why do pulsating stars...

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 2025.

Today's 2 topics:

- On 27 December 2024 the Atlas group in Chile discovered an object now known as 2024 YR4 which appeared to have a significant chance of impacting Earth 22 December of 2032. The most recent data indicates the chance that 2024 YR4 impact Earth is about 1 in 25,000. These data indicate our moon has about a 1 in 700 chance to be impacted by this space rock. Even so a...