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APOD: 2023-06-02 - Messier 101 (Narrated by Brian)
Astronomy Picture of the Day - June 2nd, 2023 - Messier 101 (Narrated by Brian)
Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least. About 170,000 light-years across, this galaxy is enormous, almost twice the size of our own Milky Way. M101 was also one of the original spiral nebulae observed by Lord Rosse's large 19th century telescope, the Leviathan of Parsontown. Assembled from 51 exposures recorded by the Hubble Space Telescope in the 20th and 21st centuries, with additional data from ground based telescopes, this mosaic spans about 40,000 light-years across the central region of M101 in one of the highest definition spiral galaxy portraits ever released from Hubble. The sharp image shows stunning features of the galaxy's face-on disk of stars and dust along with background galaxies, some visible right through M101 itself. Also known as the Pinwheel Galaxy, M101 lies within the boundaries of the northern constellation Ursa Major, about 25 million light-years away.
Source: https://apod.nasa.gov/apod/ap230602.html
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https://www.youtube.com/watch?v=JzilF5XITd0
Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least. About 170,000 light-years across, this galaxy is enormous, almost twice the size of our own Milky Way. M101 was also one of the original spiral nebulae observed by Lord Rosse's large 19th century telescope, the Leviathan of Parsontown. Assembled from 51 exposures recorded by the Hubble Space Telescope in the 20th and 21st centuries, with additional data from ground based telescopes, this mosaic spans about 40,000 light-years across the central region of M101 in one of the highest definition spiral galaxy portraits ever released from Hubble. The sharp image shows stunning features of the galaxy's face-on disk of stars and dust along with background galaxies, some visible right through M101 itself. Also known as the Pinwheel Galaxy, M101 lies within the boundaries of the northern constellation Ursa Major, about 25 million light-years away.
Source: https://apod.nasa.gov/apod/ap230602.html
This video was auto generated using data from NASA Open API.
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https://www.youtube.com/watch?v=JzilF5XITd0
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Astronomy Picture of the Day - January 28th, 2020 - Star Formation in the Tadpole Nebula (Narrated by Amy)
What's all of the commotion in the Tadpole Nebula? Star formation. Dusty emission in the Tadpole Nebula, IC 410, lies about 12,000 light-years away in the northern constellation of the Charioteer (Auriga). The cloud of glowing gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. Formed in the interstellar cloud a mere 4 million years ago, bright newly formed cluster stars are seen all around the star-forming nebula. Notable near the image center are two relatively dense streamers of material trailing away from the nebula's central regions. Potentially sites of ongoing star formation in IC 410, these cosmic tadpole shapes are about 10 light-years long. The featured image was taken in infrared light by NASA's Wide Field Infrared Survey Explorer (WISE) satellite. Discovery + Outreach: Graduate student research position open for APOD
Image Credit & Copyright: Francesco Antonucci
Source: https://apod.nasa.gov/apod/ap200128.html
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Wikipedia Picture of the Day - February 21st, 2020 - Pullman porter (Narrated by Brian)
This picture is a color lithograph advertisement from 1894, showing the interior of a Pullman dining car belonging to the Cincinnati, Hamilton and Dayton Railway. It depicts two men seated at a table being served by an African-American Pullman porter. Through the window, the Mosler Safe Works in Hamilton, Ohio can be seen, with newly manufactured goods being loaded onto barges on the Great Miami River.
Starting soon after the American Civil War, George Pullman sought out former slaves to work on his sleeping cars. Until the 1960s, Pullman porters were exclusively black and, in 1925, under the leadership of A. Philip Randolph, they formed the first all-black union, the Brotherhood of Sleeping Car Porters. They were supervised by a Pullman conductor, who was then invariably white. In 1926, Pullman employed more than 10,000 porters, a term that has been superseded by "sleeping car attendant".
Lithograph credit: Strobridge Lithographing Company
Source: https://en.wikipedia.org/wiki/Template:POTD/2020-02-21
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Astronomy Picture of the Day - February 12th, 2022 - Aurora by Moonlight (Narrated by Emma)
The ice was singing as light from a bright gibbous Moon cast shadows across this frozen lake, about 20 kilometers north of Stockholm, Sweden, planet Earth. In the alluring night skyscape captured on February 10, shimmering auroral curtains of light dance in the evening sky. On that northern night nature's performance included the auroral displays fostered by a minor geomagnetic storm. Stormy space weather was the result of a coronal mass ejection, erupting from a solar prominence days earlier and brushing our fair planet's magnetosphere.
Image Credit & Copyright: Clear Skies
Source: https://apod.nasa.gov/apod/ap220212.html
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Wikipedia Picture of the Day - November 15th, 2023 - Prehnite (Narrated by Matthew)
Prehnite is an inosilicate mineral of calcium and aluminium with the chemical formula Ca2Al(AlSi3O10)(OH)2. Limited Fe3+ substitutes for aluminium in the structure. Prehnite crystallizes in the orthorhombic crystal system, and most often forms as stalactitic, botryoidal, reniform or globular aggregates. Prehnite is brittle with an uneven fracture and a vitreous to pearly luster. It has a hardness of 6.5 on the Mohs scale and its specific gravity is 2.80 to 2.95, while its color varies from light green to yellow, with some specimens also colorless. Prehnite is used as a gemstone, and was first described in 1788 for an occurrence in the Karoo dolerites of Cradock in the Eastern Cape of South Africa. It was named after Colonel Hendrik Von Prehn, the commander of the military forces of the Dutch colony at the Cape of Good Hope from 1768 to 1780. This prehnite crystal, measuring 4.0 cm × 3.5 cm × 2.0 cm (1.6 in × 1.4 in × 0.8 in), was found in Southbury, Connecticut, in the United States.
Photograph credit: Ivar Leidus
Source: https://en.wikipedia.org/wiki/Template:POTD/2023-11-15
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Wikipedia Picture of the Day - February 12th, 2024 - Snakelocks anemone (Narrated by Brian)
The snakelocks anemone (Anemonia viridis) is a sea anemone found in the eastern Atlantic Ocean and the Mediterranean Sea. The latter population is however sometimes considered a separate species, the Mediterranean snakelocks anemone (Anemonia sulcata). Several species of small animals regularly live in a symbiotic or commensal relationship with the snakelocks anemone, gaining protection from predators by residing among the venomous tentacles. These include the incognito goby, the shrimp Periclimenes aegylios and the Leach's spider crab.
Photograph credit: Diego Delso
Source: https://en.wikipedia.org/wiki/Template:POTD/2024-02-12
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Astronomy Picture of the Day - August 31st, 2022 - Siccar Point on Mars (Narrated by Salli)
What created this unusual hill on Mars? No one is sure. A good outlook to survey the surrounding area, Siccar Point stands out from its surroundings in Gale Crater. The unusual mound was visited by the robotic Curiosity rover exploring Mars late last year. Siccar Point not only has a distinctive shape, it has dark rocks above lighter rocks. The apparent much younger age of the dark rocks indicates a time-break in the usual geological ordering of rock layers -- by a process yet unknown. The Martian hill is named for Siccar Point on Earth, a place in Scotland itself distinctive as a junction between two different rock layers. Curiosity continues to explore Gale crater on Mars, looking for clues of ancient life. Simultaneously, 2300 kilometers away, its sister rover Perseverance explores Jezero crater, there assisted by the flight-capable scout Ingenuity.
Source: https://apod.nasa.gov/apod/ap220831.html
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Wikipedia Picture of the Day - February 20th, 2023 - Human genome (Narrated by Brian)
The human genome is the complete set of nucleic acid sequences for humans, encoded as DNA within the 23 chromosome pairs in cell nuclei and in small DNA molecules found within mitochondria. This includes both protein-coding DNA sequences and various types of DNA that does not encode proteins. This schematic representation of the human diploid karyotype shows the organization of the human genome into chromosomes, as well as annotated bands and sub-bands as seen on G banding. The diagram shows both the female (XX) and male (XY) versions of the 23rd chromosome pair. Chromosomal changes during the cell cycle are displayed at the top center. The human mitochondrial genome is shown to scale at the bottom left.
Diagram credit: Mikael Häggström
Source: https://en.wikipedia.org/wiki/Template:POTD/2023-02-20
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Wikipedia Picture of the Day - October 17th, 2021 - Old Cathedral, Brescia (Narrated by Emma)
The Old Cathedral, Brescia, or the Duomo Vecchio, is a Catholic church in Brescia, Italy. One of the most important examples of a round church in the Romanesque style, the rustic co-cathedral stands next to the New Cathedral.
Photograph credit: Wolfgang Moroder
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Astronomy Picture of the Day - November 13th, 2020 - The Tarantula Zone (Narrated by Brian)
The Tarantula Nebula, also known as 30 Doradus, is more than a thousand light-years in diameter, a giant star forming region within nearby satellite galaxy the Large Magellanic Cloud. About 180 thousand light-years away, it's the largest, most violent star forming region known in the whole Local Group of galaxies. The cosmic arachnid sprawls across the top of this spectacular view, composed with narrowband filter data centered on emission from ionized hydrogen and oxygen atoms. Within the Tarantula (NGC 2070), intense radiation, stellar winds and supernova shocks from the central young cluster of massive stars, cataloged as R136, energize the nebular glow and shape the spidery filaments. Around the Tarantula are other star forming regions with young star clusters, filaments, and blown-out bubble-shaped clouds. In fact, the frame includes the site of the closest supernova in modern times, SN 1987A, right of center. The rich field of view spans about 2 degrees or 4 full moons, in the southern constellation Dorado. But were the Tarantula Nebula closer, say 1,500 light-years distant like the local star forming Orion Nebula, it would take up half the sky.
Image Credit & Copyright: Ignacio Diaz Bobillo
Source: https://apod.nasa.gov/apod/ap201113.html
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