NASA’s Astronomy Picture of the Day

In today's image, we see an image from perhaps the late 1800s showing a person looking out beyond our known universe at the time consisting of Earth, the Sun, Moon, and sphere of the stars. The person is looking out to what might be beyond what is currently known, perhaps trying to better understand our universe.

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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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see Charon, the largest of the moon of the dwarf planet Pluto. Charon was discovered in 1978 and this discovery photo is seen in the upper left. The main image shows far more detail and was from the 2015 flyby of the New Horizons spacecraft which explored Pluto and its moons.

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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see the prominent spiral galaxy known as Messier 101. We see the galaxy face-on looking down on its spiral structure with the great swirling spiral arms and their blue star clouds spiraling out from the central portions of the galaxy.

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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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see the supernova remnant known as Cassiopeia A. This would have been seen to explode from Earth back in the later 1600. However, extensive obscuration kept astronomers from viewing it as a prominent supernova. Here we see it in a combination of visible light and x-rays.

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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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see a simulation showing the formation of a galaxy disk over billions of years compressed down into about 2 minutes. Galaxy evolution takes such a long time that there is no way we can see a galaxy evolve and change except through models and simulations such as the one used today.

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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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see the Dumbbell Nebula, also known as M27. This is an example of a planetary nebula which is the end state of a star much like our own Sun. The outer layers have been expelled out into space while the core collapses down to a white dwarf star - which the mass of a star, but the size of 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 directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see bioluminescent plankton giving off light in the waves off an island in the Indian Ocean. In the sky, we see the Milky Way as well as a number of emission nebulae and the asterism known as the Southern Cross.

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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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see the asteroid Ida with its moon, Dactyl. This moon was discovered in 1993 when the Galileo spacecraft flew by the asteroid on its way to Jupiter and was able in discover the moon. We now know of many asteroid that have moon like the one we see here today.

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 corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see Neptune and its large moon Triton as timed by the Voyager 2 spacecraft back in 1989. Voyager 2 is the only spacecraft to have visited the outermost planet in the solar system. In order to see an object as a crescent, one needs to have traveled out beyond that object and be able to look back toward 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 website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

In today's image, we see part of the Virgo galaxy cluster including the giant elliptical galaxy M87 which is near the lower part of the image. We also see Markarian's Chain toward the left side 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 Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

I welcome comments and suggestions about these podcasts. I can be reached here: [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.