Astronomy Cast Ep. 790: Meteorites From Other Worlds
The 365 Days of Astronomy
Hosted by: Fraser Cain ( ) and Dr. Pamela L. Gay ( ) Streamed live April 17, 2026. Even though humanity has returned samples from a fraction of the worlds in the solar system, the cosmos has delivered many more without us having to lift a finger. Meteorites. We have meteorites from the Moon, Vesta and even Mars! What have we learned about these rocks from other worlds? Space missions to other worlds cost millions to billions of dollars, and if we want to know exactly where space rock samples come from, we need to spend the big bucks for sample return. But, if it's good enough to know "this...
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Travelers in the Night Eps. 373 & 374: Tracking 3I/Atlas & Good Night at Bok
The 365 Days of Astronomy
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From October & November, 2025 Today's 2 topics: - Scientists are using many approaches to understanding the nature and history of 3I/Atlas the third known interstellar traveler in the night. At a hyperbolic velocity of 130,000 mph it is the fastest interstellar visitor ever measured. - On a recent clear night my Catalina Sky Survey teammate Hannes Groller was asteroid hunting with the Steward Observatory 90 inch...
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Actual Astronomy - 12 Months of Messier
The 365 Days of Astronomy
Episode 531. Just a reminder for people to write in with their questions for David Nagler. Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. Some binocular astronomy targets: - M40 - 9.6 Magnitude 1.7’ This is a pair of faint stars located in Ursa Major. They are a tough find in binoculars, and you will be challenged to split them with binoculars. In telescopes, they appear to be an identical pair of stars and easy to split even at low power. - M108 -...
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EVSN - Supervolcanoes: Erupt, Refill, Repeat
The 365 Days of Astronomy
From Wednesday, April 15, 2026. This week, in the first of our new shorter and more frequent episodes, we are going to take a look at the interplay of plate tectonics, geology, climate, and life. Specifically, we’re looking at the interplay between super volcanoes and us! Did you know Naples is on a supervolcano? Also, in this episode: human sperm get lost in space. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: and donate as much as you can! Share the podcast with your friends and send the Patreon link to...
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Guide To Space - Bringing Mars To Earth
The 365 Days of Astronomy
The Plans For a Mars Sample Return Mission. Hosted by Fraser Cain. From Aug 28, 2019. One of the great accomplishments of the Apollo missions was to bring home hundreds of kilograms of lunar rock. Suddenly, geologists had a lifetime’s worth of lunar samples captured from several different spots across the Moon. These rocks and dust have been under continuous analysis since the Apollo 11 astronauts came home over 50 years ago. And they’re still making discoveries. Scientists have samples of the Sun’s solar wind, particles from a comet’s tail, a few grams from an asteroid, with...
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Cheap Astronomy - Dear CA # 133: Why It’s Always C
The 365 Days of Astronomy
Cheap Astronomy investigates why light moves at light speed in a vacuum. Hosted by Steve Nerlich. Shining a light! Dear Cheap Astronomy – Why does a photon travel at speed c, part1 It may sound a bit strange to ask why light travels at the speed of light, but that’s because c isn’t really the speed of light – it’s really a measure of the relationship between distance (or space) and time. It's become customary to call c the speed of light, but in reality light moves at different and slower speeds through air, water or glass, it only moves at c in a vacuum. Dear Cheap Astronomy...
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Deep Astronomy - Webb's Deepest Field in 4K - Discoveries of Webb Space Telescope: Ep. 5
The 365 Days of Astronomy
Hosted by Tony Darnell. From May 23, 2025. The COSMOS-Web dataset represents the deepest look into our universe done by . We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. ...
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Astronomy Cast Ep. 161: Launch Facilities
The 365 Days of Astronomy
From October 26, 2009. Launching a rocket into space requires a big effort on the ground. Space agencies have built up huge infrastructures to store, prepare and launch rockets. Let’s take a look at what’s involved on the ground at a place like Cape Canaveral. What happens before, during and after a launch. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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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Travelers in the Night Eps. 871 & 872: New Mars Trojan & Climate Ignored
The 365 Days of Astronomy
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From October 2025. Today's 2 topics: - The Lagrange point L4 is 60° ahead of Mars whereas L5 is 60° behind Mars on the red planet’s orbital path about the Sun. An object placed at either of these locations is trapped gravitationally and is likely to remain there indefinitely. The Mars L4 and L5 locations could provide a permanent place for staging and resupply missions to Mars and would give humans a different view of...
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NOIR Lab - An Extremely Rare Ancient Star
The 365 Days of Astronomy
Astronomers have discovered one of the most chemically primitive stars ever identified — an ancient stellar relic that preserves the chemical imprint of the very first stars in the Universe. In this podcast, Dr. Ani Chiti discusses the discovery of this ancient star and what it tells us about star formation in the early Universe. Bios: - Rob Sparks is in the Communications, Education and Engagement group at NSF’s NOIRLab in Tucson, Arizona. - Dr. Anirudh Chiti is a Brinson Prize Fellow at Stanford University, interested in the formation of the first stars and galaxies,...
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From October 26, 2009.
Launching a rocket into space requires a big effort on the ground. Space agencies have built up huge infrastructures to store, prepare and launch rockets. Let’s take a look at what’s involved on the ground at a place like Cape Canaveral. What happens before, during and after a launch.
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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The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu
Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.