Robert M Wagner
NASA’s Astronomy Picture of the Day
These podcasts are my discussion of NASA's Astronomy Picture of the Day. These are brief (3-5 minute) audio summaries of the picture posted on NASA's Picture of the Day website: APOD. Video versions of these are available on YouTube. I use these as the introduction to each of my introductory astronomy classes. Students will be able to access them here to review what was discussed in class. I appreciate any comments or suggestions which can be sent to: wagnerastronomy@gmail.com.
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Episodes
2024 December 12 - Phaethon's Brood 12.12.2024
In today's image, we see the asteroid known as 3200 Phaethon. This asteroid is the source of the material that forms the Geminid meteor show which is peaking on December 13 of this year. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day ....
2024 December 11 - The Shells and Jets of Galaxy Centaurus A 11.12.2024
In today's image, we see the nearby active galaxy known as Centaurus A. The galaxy is active because of a collision which funnels material into the central black hole, causing it to emit large amounts of energy. This is includes jets of material, which can be seen in the image. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Sit...
2024 December 10 - The Great Meteor Storm of 1833 10.12.2024
In today's image, we see the meteor storm which occurred in 1833. A meteor storm is a very intense meteor shower with far more meteors visible. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the ima...
2024 December 09 - Pleiades: The Seven Sisters Star Cluster 09.12.2024
In today's image, we see the open star cluster known as the Pleiades. The cluster is moving through a dusty area of space which causes the blue reflection nebula around the stars. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You ca...
2024 December 08 - Aurora around Saturn's North Pole 08.12.2024
In today's image, we see the planet Saturn as imaged by the Hubble Space Telescope. Here we can see the auroral activity around the pole of the planet caused by charged particles from the Sun which are directed by the magnetic field of the planet. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the...
2024 December 07 - Rocket Engine Fireplace 07.12.2024
In today's image, we see an image showing the traditional crackling fireplace with a twist. This is the rockets from the Artemis I mission to the Moon from 2022 which provide the fire and most of the sounds. This is just a still Fram from the video which runs about 2 hours. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site fo...
2024 December 06 - Xuyi Station and the Fireball 06.12.2024 3:27
In today's image, we see a fireball as seen over Xuyi Station. This is where the comet Tsuchinshan-ATLAS was discovered. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the image to select the photo...
2024 December 05 - Stereo Jupiter Near Opposition 06.12.2024
In today's image, we see two images of Jupiter which allow for a 3D view of the giant planet. You just need to stare between the two images and cross your eyes a bit. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the arc...
2024 December 04 - Driveway Analemma 04.12.2024 3:40
In today's image, we see an analemma. An analemma if formed generally by taking an image of the Sun from the exact same location at the same time every day to see how the position of the Sun changes. In this case, we are watching how a shadow cast by the Sun changes instead of the sun itself. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New M...
2024 December 03 - Ice Clouds over a Red Planet 03.12.2024
In today's image, we see clouds in the atmosphere of Mars as viewed by the Perseverance rover on Mars earlier this year. The clouds are composed of ice crystals since the atmospheric pressure on Mars is too low to allow for liquid water. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and...
2024 December 02 - NGC 300: A Galaxy of Stars 02.12.2024 3:53
In today's image, we see the nearby spiral galaxy known as NGC 300. This galaxy is close enough that we can resolve individual stars in its spiral arms, instead of just seeing them as a blue glow. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of...
2024 December 01 - Cosmic Latte: The Average Color of the Universe 01.12.2024 3:38
In today's image, we see the average color of the universe if the light from the galaxies were to be smeared out over the entire sky. The color changes over time and was slightly bluer in the past and will be slightly redder in the future as stellar populations change. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APO...
2024 November 30 - Winter and Summer on a Little Planet 30.11.2024
In today's image, we see an extreme panoramic view from the French Alps. Taken on two different days, we see the scene in winter in the lower part of the image and summer in the upper part. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Da...
2024 November 29 - Messier 4 29.11.2024
In today's image, we see the globular star cluster known as Messier 4. This is one of the nearer globular clusters to us. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the image to select the photo...
2024 November 28 - NGC 206 and the Star Clouds of Andromeda 28.11.2024 3:52
In today's image, we see a large star forming region known as NGC 206 which happens to be located in the Andromeda galaxy. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the image to select the phot...
2024 November 27 - The Meteor and the Comet 27.11.2024
In today's image, we see a meteor and Comet Tsuchinshan-ATLAS which was visible a couple of months ago. While the meteor was only visible for a fraction of a second, the comet was visible in the sky for several weeks. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at:...
2024 November 26 - The Sombrero Galaxy from Webb and Hubble 26.11.2024
In today's image, we see the Sombrero Galaxy in visible light from the Hubble Space Telescope and in infrared light from the James Webb Space Telescope. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link belo...
2024 November 25 - The Horsehead Nebula 25.11.2024 3:37
In today's image, we see the Horsehead Nebula in Orion. This is a dark nebula, which blocks out the light from behind it. Within the nebula, new stars are forming which will eventually destroy the nebula. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Pi...
2024 November 24 - Journey to the Center of the Galaxy 24.11.2024 3:58
In today's image, we see a video clip that will show a trip through the star clouds of the Milky Way and into the central regions of the galaxy itself. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below...
2024 November 23 - Interplanetary Earth 23.11.2024
In today's image, we see two images of our planet Earth as taken from two distant spacecraft on the same day in July of 2013. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the image to select the p...
2024 November 22 - The Medusa Nebula 22.11.2024 3:49
In today's image, we see the Medusa Nebula, an example of a planetary nebula which is the end-state of lower mass stars including our own Sun. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the imag...
2024 November 21 - The Elephant's Trunk in Cepheus 21.11.2024
In today's image, we see the star forming region now as the Elephant's trunk which is visible in the constellation of Cepheus in the northern sky. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day . You can use the archive link below the...
2024 November 20 - Earthset from Orion 20.11.2024
In today's image, we see the Earth as it is just about to set behind the Moon as seen from the Orion spacecraft which was a part of the Artemis I mission to fly an unmanned craft around the Moon. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of...
2024 November 19 - Undulatus Clouds over Las Campanas Observatory 19.11.2024
In today's image, we see what are known as undulatus clouds appearing to converge over the telescopes domes on the mountaintop. These are clouds caused by the air currents in Earth atmosphere which give them their distinctive shape. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and websi...
2024 November 18 - Stars and Dust in the Pacman Nebula 18.11.2024
In today's image, we see part of what is known as the Pacman Nebula. This is a star forming region, with a newly formed cluster of stars at the center. Those stars are eroding away the material around them, with only the densest areas left to form new stars. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You can...
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