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.

Author

Robert M Wagner

Category

Education

Podcast website

podcast.show

Latest episode

Jul 11, 2026

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Episodes

2025 April 17 - Virgo Cluster Galaxies 17.04.2025

In today's image, we see the Virgo galaxy cluster, the nearest large galaxy cluster to our own local group of galaxies. This includes the giant elliptical known as M87 to the lower right of the image. 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 Pictur...

2025 April 16 - Halo of the Cat's Eye 16.04.2025

In today's image, we see the Cat's Eye nebula. The is an example of a planetary nebula. Here we look at an image which enhances the outer layers to make them more easily 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...

2025 April 15 - Planetary Nebula NGC 1514 from Webb 15.04.2025

In today's image, we see a planetary nebula as imaged by the James Webb Space Telescope. A planetary nebula is the end state of a star much like our own Sun where the core compacts to a white dwarf and the outer layers are expelled out into space. 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...

2025 April 14 - The Galactic Center in Radio from MeerKAT 14.04.2025

In today's image, we see the region around the center of our galaxy as imaged by an array of radio telescope in South Africa. The inset image is a small portion that has been imaged by the James Webb Space Telescope in the infrared. 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...

2025 April 13 - An Unusual Hole in Mars 13.04.2025

In today's image, we see a region of Mars including a hole where a meteor may have punched a hole through the Martian surface and into some caverns below. If this is correct, it may mean there is the possibility of some simple martian life in the caverns, shielded from the ultraviolet light of the Sun which sterilizes the surface. My podcasts are available in video form through this YouTube Channe...

2025 April 12 - Moon Near the Edge 12.04.2025

In today's image, we see our Moon near the edge of a building in Manhattan. The moon is bright enough to be visible in the day, especially during certain phases. 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...

2025 April 11 - The ISS Meets Venus 11.04.2025

In today's image, we see a thin crescent Venus and the International Space Station as they pass close to one another in the 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 image to select th...

2025 April 10 - 38 hours with the M81 Group 10.04.2025

In today's image, we see a deep exposure of the M81 group of galaxies. The two most prominent galaxies here are in the slow process of a galaxy merger that will eventually leave just a single 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...

2025 April 09 - HH 49: Interstellar Jet from Webb 09.04.2025

In today's image, we see HH 49, a Herbig-Haro object caused by the jet of material being expelled from eh region around a young star. The object at the tip of the jet turned out to be a distant galaxy, unrelated to the jet. 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 direct...

2025 April 08 - Moon Visits Sister Stars 08.04.2025

In today's image, we see the moon in conjunction with the Pleiades star cluster. These conjunctions (and occultations) will occur over the next few years because of the specific position of the Moon's orbit relative to Earth. 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 dire...

2025 April 07 - NGC 4414: A Flocculant Spiral Galaxy 07.04.2025

In today's image, we see an example of a flocculant spiral galaxy, which is a galaxy without distinct spiral arms. Note: In the audio, the image is incorrectly 9identified as the April 1 image, that is incorrect and this is the image for April 7. 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 i...

2025 April 06 - Moonquakes Surprisingly Common 06.04.2025

In today's image, we see an image from the Apollo 11 mission with a seismograph being set up on the lunar surface. Detections if seismic waves have show that moonquakes are more common than expected. 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...

2025 April 05 - The Gargoyles' Eclipse 05.04.2025

In today's image, we see the partial solar eclipse from this past week, where our Moon passed in front of our Sun, blocking out a portion of its light. This was near the end of the first eclipse season of the year, but two more eclipses will occur in September of this year. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site fo...

2025 April 04 - Hickson 44 in Leo 04.04.2025

In today's image, we see the compact group Hickson 44. Compact groups of galaxies are galaxies seen in the same small area of the sky and are often related to and interacting with one another. 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...

2025 April 03 - The Da Vinci Glow 03.04.2025

In today's image, we see the thing crescent moon, only a day or so after the new moon. While only a small portion of the Moon is directly illuminated by the Sun, The rest of the Moon can be seen illuminated faintly by sunlight reflected from Earth. 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...

2025 April 02 - Jupiter and Ring in Infrared from Webb 02.04.2025

In today's image, we see Jupiter, its faint ring, and several of its moons as imaged by the James Webb Space Telescope in the infrared. The date is misstated in the audio. It is indeed April 2, not March 30. 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...

2025 April 01 - A Double Sunrise from a Partial Eclipse 01.04.2025

In today's image, we see a video showing the Sun rising in real time. The sun is partially eclipsed, so we see two distinct parts of the Sun rising over the horizon at first, before they join together in a crescent 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 website directly...

2025 March 31 - Parker: The Solar System from Near the Sun 31.03.2025

In today's image, we see image in a timelapse from the Parker Solar Probe which studies then Sun. We will see six of the eight planets, a comet, and a star cluster in addition to the solar wind and a coronal mass ejection from the 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 we...

2025 March 29 - Stereo Helene 29.03.2025

In today's image, we see one of the moons of Saturn, Helene. This is now as a Trojan moon which orbits at a Lagrange point - this is a stable position in the gravitational well of Saturn and one of its larger moons, Dione. 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 directl...

2025 March 28 - Lunar Dust and Duct Tape 28.03.2025

In today's image, we see an image from the Apollo 17 mission where the astronauts made repairs to their rover using duct tape. The repair to the fender kept the rover's wheels from kicking up dust as the rover moved across the Moon's surface. 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...

2025 March 27 - Messier 81 27.03.2025

In today's image, we see the spiral galaxy known as Messier 81. This is a relatively nearby galaxy, about 11.8 million light years away. Distances to nearby spiral galaxies like this one can be determined through the measurements of variable 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...

2025 March 26 - Star Formation in the Pacman Nebula 26.03.2025

In today's image, we see the region known as the Pacman Nebula. This is a star forming region, showing dark globules within the nebula where stars are currently forming. 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...

2025 March 25 - A Blue Banded Blood Moon 25.03.2025

In today's image, we see three images of the total lunar eclipse from a week ago. The red glow if from light coming through the main part of Earth's atmosphere. The blue band is from sunlight passing through the ozone in the stratosphere. 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...

2025 March 24 - A Total Lunar Eclipse Over Uruguay 24.03.2025

In today's image, we see a timelapse showing the total lunar eclipse that occurred this last week. We can watch the stars and Milky Way become ore visible as the Moon's light fades. 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...

2025 March 23 - Ancient Ogunquit Beach on Mars 23.03.2025

In today's image, we see an are on Mars which once contained liquid water. Mars is no longer able to have water in liquid form because of its low atmospheric pressure, but there is strong evidence that liquid water did exist on the surface billions of years ago. My podcasts are available in video form through this YouTube Channel . This Podcast is an authorized New Media Mirror Site for APOD. You...

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