The 365 Days of Astronomy 365DaysOfAstronomy.org

https://www.youtube.com/watch?v=l1wyLzFEz2Q
Streamed live on Nov 27, 2023.
Astronomers talk about all the amazing discoveries they’re making but sometimes, it turns out, they were wrong. After decades and centuries of discoveries, how have they changed their minds?
 
This video was made possible by the following Patreon members:
Jordan Young
Stephen Veit
Jeanette Wink
Siggi Kemmler
Andrew Poelstra
Ed
BogieNet
Brian Cagle
David Truog
Gerhard Schwarzer
David
Nicholas Cunningham
THANK YOU! - Fraser and Dr. Pamela
 
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. 
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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.

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
Today's 2 topics:
- Every year asteroid hunters discover about a hundred objects which are larger than 450 feet in diameter and come closer than 20 times the Moon's distance from us. We call these potentially hazardous asteroids. In 2015 my group the Catalina Sky Survey discovered 21 of them. It was thus exciting news to our team, when, recently, our newest team member Greg Leonard discovered three of them in rapid succession.
- Aten asteroids pose a threat as well as an economic opportunity for humans.
 
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.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!
http://cosmoquest.org/Donate This show is made possible through your donations. 
Thank you! (Haven't donated? It's not too late! Just click!)
------------------------------------
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.

Some slight changes to Saturn and Jupiter in the sky, the start of a big change for Venus, and even more rocks fall from the sky this December here on the Last Minute Astronomer, bringing astronomy to normies and nerds, with little time to spare.  Let’s start by talking about the naked eye planets visible this month, the lunar phases, and then the meteor shower and other events, so you can plan ahead better than me. 
 
13th/14th – Geminid Meteor Shower – A VERY good year for this shower, as there is only a thin crescent Moon which sets early.  So get out there and take advantage of the possible 100 meteors per hour!  
When? Really, any time of the night is good, though the closer you are to dawn on the 14th, the better.
Where do I look? The whole sky, but note Gemini is where the radiant is - where the meteors will appear to be coming from. Gemini will be in the East after sunset, South after midnight, West in the morning.
But be well prepared…
Commit yourself to staying out at least 20 minutes. Find a dark location and lie down in a reclining chair or hammock Check the weather to see if the skies will be clear  Adapt your eyes to the dark by staying away from light sources or using a red light if you need to look at a star chart or not trip over something.   You never know when a nice meteor will burn up, so take a nice look at the sky in general, noting that the meteors will appear to go from the radiant and outward. Dress warmly! Layers!  
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.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!
http://cosmoquest.org/Donate This show is made possible through your donations. 
Thank you! (Haven't donated? It's not too late! Just click!)
------------------------------------
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.

In today’s episode, we’re going to look at everything from how past Earth couldn’t support photosynthesis because the days were just too short, to current Earth letting us get hit by more Cosmic Rays prior to Earthquakes going off, and to supernovae threatening our world while alien stars eat other planets. Science, sometimes, is just kind of violent. (This episode was originally released on YouTube July 8, 2023.)
 
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.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!
http://cosmoquest.org/Donate This show is made possible through your donations. 
Thank you! (Haven't donated? It's not too late! Just click!)
------------------------------------
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.

The Observer’s Calendar for December 2023!
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. 
Patreon Calendar Draw reminder!  
- Dec 4 - Mercury at greatest elongation in evening sky 21°
- Dec 5 - Last quarter Moon
- Dec 6 - Curtis X visible - Day of Darkness
- Dec 9 - Venus 4° North of Moon
- Dec 10 - Try to spot Uranus at M=5.7 this week in Aries
- Dec 12 - New Moon
- Dec 13/14 - Geminid Meteor Shower peaks - ZHR = 120!
- Dec 14 Mercury 4° north of the Moon — not here…at least in my software.
- Dec 17 - Saturn 2° N of Moon in Aquarius
- Dec 19 Double Shadow Transit on Jupiter?
- Dec 20 - Lunar Straight wall & First Quarter Moon
- Dec 21 - Winter Solstice and Jupiter 3° South of the Moon
- Dec 22 Ursid Meteor Shower Peaks - ZHR = 10
Asteroid Metis 9 at 8.4 magnitude opposition. Discovered by Andrew Graham on 25 April 1848, at Markree Observatory in Ireland. Metis (minor planet designation: 9 Metis) is one of the larger main-belt asteroids. It is composed of silicates and metallic nickel-iron, and may be the core remnant of a large asteroid that was destroyed by an ancient collision. Metis is estimated to contain just under half a percent of the total mass of the asteroid belt.
- Dec 26 Full Moon
- Dec 28 Asteroid 5 Astraea at Opposition! 5 Astraea is an asteroid in the asteroid belt. Its surface is highly reflective and its composition is probably a mixture of nickel-iron with silicates of magnesium and iron. It is an S-type asteroid in the Tholen classification system. Astraea was the fifth asteroid discovered, on 8 December 1845, by Karl Ludwig Hencke and named for Astraea, a Greek goddess of justice named after the stars. It was his first of two asteroid discoveries. The second was 6 Hebe. A German amateur astronomer and post office headmaster, Hencke was looking for 4 Vesta when he stumbled on Astraea. The King of Prussia awarded him an annual pension of 1,200 marks for the discovery.
- Dec 30 Double Shadow Transit on Jupiter YES!
 
Concluding Listener Message: Just a reminder for our Patreon Calendar Draw, all you need to do is be a Patreon Supporter to be placed in our draw. Thanks to everyone for listening and you can always send us your show ideas, observations and questions to: 
actualastronomy@gmail.com
 
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.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!
http://cosmoquest.org/Donate This show is made possible through your donations. 
Thank you! (Haven't donated? It's not too late! Just click!)
------------------------------------
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.

Recorded 13 June 2023.
Hosted by Dr. Simon Steel, Deputy Director of the SETI Institute's Carl Sagan Center.
Dr. Nathalie Cabrol, Director of the SETI Institute's Carl Sagan Center, joins us live from the Global Exploration Summit in Portugal. Last week Cabrol was co-author on a comment published in Nature Astronomy that explored the implications and potential scientific impacts on increased activity on Mars, specifically, human-crewed missions. How will the presence of people on Mars affect the search for past or present life and what planetary protection measures will be required to protect the integrity of scientific research as well as life here on Earth when crews return? 
Read more about the comment at seti.org: https://bit.ly/43WGnNU
 
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.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!
http://cosmoquest.org/Donate This show is made possible through your donations. 
Thank you! (Haven't donated? It's not too late! Just click!)
------------------------------------
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.