The 365 Days of Astronomy

From Oct 12, 2010. The fact that we've found a habitable planet candidate so soon after starting our search has important implications for the number of habitable planets that may exist in our galaxy - which was estimated to be around 10 billion.     Having found Gliese 581g so soon though, may mean one of two things.  Either we were very lucky, or there are more planets out there than we thought.  Based on this discovery, it's possible that we may have many more habitable planets than originally thought.     Perhaps 20 to 30 billion stars in our galaxy may have...

The 365 Days of Astronomy

From September 22, 2008. Look around you. Breathe in some air. Everything you can see and feel was formed in a star. Today we’ll examine that long journey that matter has gone through, forged and re-forged in the hearts of stars. In fact, the device you’re using to listen to this podcast has some elements formed in a supernova explosion.   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...

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 August 2024. Today's 2 topics: - The asteroid Psyche may be one of the most expensive pieces of real estate in the solar system. It is a small world about 116 miles in diameter and is composed of almost pure nickel-iron metal. It is located in the asteroid belt between Mars and Jupiter. Scientists find evidence that Psyche may be the exposed core of a planet which was destroyed by collisions as it was trying to form...

The 365 Days of Astronomy

Hosted by Tony Darnell. From July 6, 2017. If we send humans to Mars, will they be able to survive? How hostile is the solar system for human exploration? The Mars environment presents many challenges to human survival and long-term residence. In addition to radiation, unbreathable atmosphere, and dust storms, surviving alien microorganisms can present a health risk.   The US Congress has directed NASA to plan for a human mission to Mars. A critical element of the planning is to ensure the health and safety of astronauts travelling to, working on, and returning from the Red Planet. ...

The 365 Days of Astronomy

From May 21, 2025. This week, we take a closer look at the weirdly twisty search for a possible planet in our outer solar system. We'll also take in the happy science of aurorae here, at Jupiter, and over Neptune, as well as a bunch of weird discoveries that has some people screaming "It's Aliens!" (it's not aliens).    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!...

The 365 Days of Astronomy

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. The Observer’s Calendar for June 2025 on Episode 485 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.   June 1 - Venus at greatest elongation in morning sky 46-degrees from Sun. Mars is still 30-degrees up but just over 5 arc seconds when the month begins. June 3 - first quarter Moon June 4 - Lunar Straight Wall Visible this evening June 5 - Eye of...

The 365 Days of Astronomy

Ralph Wilkins and Dr. Jenifer “Dr. Dust” Millard host.  Damien Phillips, John Wildridge and Dustin Ruoff produce. From Jan 28, 2022. Taking a look at how over the last 40 years we went from only knowing of the handful of planets in our solar system to knowing of around 5,000 planets littering the galaxy.   How have we discovered new planets? How many are there?  How many stars have planets around them?  Are there star systems with multiple planets like our solar system?  Do we see the diversity of large gassy, small rocky and ringed planets around other...

The 365 Days of Astronomy

Part 1 of 2!  How do fundamental constants appear in physics? Why are they so important? Why do we care where they come from?  I discuss these questions and more in today’s Ask a Spaceman!   Support the show: All episodes: Watch on YouTube: Read a book:   Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE!   Big thanks to my top Patreon supporters this month: Justin G, Chris L, Alberto M, Duncan M, Corey D, Michael P, Naila, Sam R, John S, Joshua, Scott M, Rob...

The 365 Days of Astronomy

Streamed live on May 26, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay Some of our favorite robots are rovers currently roving around the surface of the Moon & Mars. But there’s some pretty tricky terrain out there and engineers are scheming up clever ways to explore other worlds inspired by life that crawls, slithers, hops and flies. As we explore more surfaces and more complex surfaces throughout the solar system, mission teams are designing robot explorers that don't sit still and also don't rove. In this episode, we're going to take a look at the new technologies that are...

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 January 2017 & August 2024. Today's 2 topics: - 2017 will be (was) a good year to view comets with your unaided eye or a pair of binoculars. - My Catalina Sky Survey teammate Richard Kowalski was surprised to find a moving point of light on some his images which was more than 50 times brighter than a typical Earth approaching object he observes. He was even more amazed when it was not cataloged as a known object and...