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APOD: 2020-11-23 - A Jupiter Vista from Juno (Narrated by Emma)
Astronomy Picture of the Day - November 23rd, 2020 - A Jupiter Vista from Juno (Narrated by Emma)
Why do colorful cloud bands encircle Jupiter? Jupiter's top atmospheric layer is divided into light zones and dark belts that go all the way around the giant planet. It is high horizontal winds -- in excess of 300 kilometers per hour -- that cause the zones to spread out planet-wide. What causes these strong winds remains a topic of research. Replenished by upwelling gas, zonal bands are thought to include relatively opaque clouds of ammonia and water that block light from lower and darker atmospheric levels. One light-colored zone is shown in great detail in the featured vista taken by the robotic Juno spacecraft in 2017. Jupiter's atmosphere is mostly clear and colorless hydrogen and helium, gases that are not thought to contribute to the gold and brown colors. What compounds create these colors is another active topic of research -- but is hypothesized to involve small amounts of sunlight-altered sulfur and carbon. Many discoveries have been made from Juno's data, including that water composes an unexpectedly high 0.25 percent of upper-level cloud molecules near Jupiter's equator, a finding important not only for understanding Jovian currents but for the history of water in the entire Solar System.
Source: https://apod.nasa.gov/apod/ap201123.html
This video was auto generated using data from NASA Open API.
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https://www.youtube.com/watch?v=SSKWBYehEy4
Why do colorful cloud bands encircle Jupiter? Jupiter's top atmospheric layer is divided into light zones and dark belts that go all the way around the giant planet. It is high horizontal winds -- in excess of 300 kilometers per hour -- that cause the zones to spread out planet-wide. What causes these strong winds remains a topic of research. Replenished by upwelling gas, zonal bands are thought to include relatively opaque clouds of ammonia and water that block light from lower and darker atmospheric levels. One light-colored zone is shown in great detail in the featured vista taken by the robotic Juno spacecraft in 2017. Jupiter's atmosphere is mostly clear and colorless hydrogen and helium, gases that are not thought to contribute to the gold and brown colors. What compounds create these colors is another active topic of research -- but is hypothesized to involve small amounts of sunlight-altered sulfur and carbon. Many discoveries have been made from Juno's data, including that water composes an unexpectedly high 0.25 percent of upper-level cloud molecules near Jupiter's equator, a finding important not only for understanding Jovian currents but for the history of water in the entire Solar System.
Source: https://apod.nasa.gov/apod/ap201123.html
This video was auto generated using data from NASA Open API.
...
https://www.youtube.com/watch?v=SSKWBYehEy4
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Astronomy Picture of the Day - March 31st, 2023 - Seeing Titan (Narrated by Brian)
Shrouded in a thick atmosphere, Saturn's largest moon Titan really is hard to see. Small particles suspended in the upper atmosphere cause an almost impenetrable haze, strongly scattering light at visible wavelengths and hiding Titan's surface features from prying eyes. But Titan's surface is better imaged at infrared wavelengths where scattering is weaker and atmospheric absorption is reduced. Arrayed around this visible light image (center) of Titan are some of the clearest global infrared views of the tantalizing moon so far. In false color, the six panels present a consistent processing of 13 years of infrared image data from the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft orbiting Saturn from 2004 to 2017. They offer a stunning comparison with Cassini's visible light view. NASA's revolutionary rotorcraft mission to Titan is due to launch in 2027.
Source: https://apod.nasa.gov/apod/ap230331.html
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Astronomy Picture of the Day - May 3rd, 2021 - Apollo 11: Earth, Moon, Spaceship (Narrated by Emma)
After the most famous voyage of modern times, it was time to go home. After proving that humanity has the ability to go beyond the confines of planet Earth, the first humans to walk on another world -- Neil Armstrong and Buzz Aldrin -- flew the ascent stage of their Lunar Module back to meet Michael Collins in the moon-orbiting Command and Service Module. Pictured here on 1969 July 21 and recently digitally restored, the ascending spaceship was captured by Collins making its approach, with the Moon below, and Earth far in the distance. The smooth, dark area on the lunar surface is Mare Smythii located just below the equator on the extreme eastern edge of the Moon's near side. It is said of this iconic image that every person but one was in front of the camera. - NASA Remembers Michael Collins -
Source: https://apod.nasa.gov/apod/ap210503.html
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Wikipedia Picture of the Day - November 30th, 2020 - Electric match (Narrated by Brian)
An electric match is a device that uses an externally applied electric current to ignite a combustible compound. This image is a collage of three photographs depicting an electric match at the moment of ignition in the centre, together with the same match before detonation on the left and after detonation on the right. To ignite the match, a suitable electric voltage is applied to a heating element, typically a loop or coil of thin wire, which is encased in a quantity of a flammable pyrotechnic initiator fluid, which then ignites.
Photograph credit: Lucasbosch
Source: https://en.wikipedia.org/wiki/Template:POTD/2020-11-30
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Astronomy Picture of the Day - October 14th, 2022 - The Falcon and the Hunter's Moon (Narrated by Brian)
The Full Moon of October 9th was the second Full Moon after the northern hemisphere autumnal equinox, traditionally called the Hunter's Moon. According to lore, the name is a fitting one because this Full Moon lights the night during a time for hunting in preparation for the coming winter months. In this snapshot, a nearly full Hunter's Moon was captured just after sunset on October 8, rising in skies over Florida's Space Coast. Rising from planet Earth a Falcon 9 rocket pierces the bright lunar disk from the photographer's vantage point. Ripples and fringes along the edge of the lunar disk appear as supersonic shock waves generated by the rocket's passage change the atmosphere's index of refraction.
Image Credit & Copyright: Michael Seeley
Source: https://apod.nasa.gov/apod/ap221014.html
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Astronomy Picture of the Day - November 13th, 2022 - Flying Saucer Crash Lands in Utah Desert (Narrated by Brian)
A flying saucer from outer space crash-landed in the Utah desert after being tracked by radar and chased by helicopters. The year was 2004, and no space aliens were involved. The saucer, pictured here, was the Genesis sample return capsule, part of a human-made robot Genesis spaceship launched in 2001 by NASA itself to study the Sun. The unexpectedly hard landing at over 300 kilometers per hour occurred because the parachutes did not open as planned. The Genesis mission had been orbiting the Sun collecting solar wind particles that are usually deflected away by Earth's magnetic field. Despite the crash landing, many return samples remained in good enough condition to analyze. So far, Genesis-related discoveries include new details about the composition of the Sun and how the abundance of some types of elements differ across the Solar System. These results have provided intriguing clues into details of how the Sun and planets formed billions of years ago.
Source: https://apod.nasa.gov/apod/ap221113.html
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Wikipedia Picture of the Day - February 4th, 2020 - Rosa Parks (Narrated by Salli)
Rosa Parks (February 4, 1913 – October 24, 2005) was an American activist in the civil rights movement, best known for her pivotal role in the Montgomery bus boycott. On December 1, 1955, in Montgomery, Alabama, Parks rejected a bus driver's order to relinquish her seat in the "colored section" to a white passenger after the whites-only section was filled, inspiring the African-American community to boycott the Montgomery buses for more than a year. Her act of defiance and the boycott became important symbols of the civil rights movement and resistance to racial segregation. After her conviction for disorderly conduct, her appeal became bogged down in the state courts, but the federal Montgomery bus lawsuit, Browder v. Gayle, succeeded in overturning bus segregation in November 1956. Upon her death, Parks became the first woman to lie in honor in the U.S. Capitol rotunda.
This photograph of Parks being fingerprinted was taken on February 22, 1956, when she was arrested again, along with 73 others, after a grand jury indicted 113 African Americans for organizing the Montgomery bus boycott.
Photograph credit: Associated Press; restored by Adam Cuerden
Source: https://en.wikipedia.org/wiki/Template:POTD/2020-02-04
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Wikipedia Picture of the Day - July 31st, 2022 - Ada Flatman (Narrated by Emma)
Ada Flatman (1876–1952) was a British suffragette in the United Kingdom and the United States. She was sent to Holloway Prison after taking part in the "raid" on the Houses of Parliament in 1908, led by Marion Wallace Dunlop, Ada Wright and Katherine Douglas Smith, and a second wave by Una Dugdale. The following year she was employed by the Women's Social and Political Union (WSPU) to organise their activities in Liverpool, taking over from Mary Phillips. In July 1910, Flatman was a key speaker at one of the platforms in the 10,000 women rally at Hyde Park, London. She worked with Alice Stewart Ker, but it was Flatman who was trusted by Emmeline Pethick when Liverpool requested that they be allowed to open a WSPU shop. The shop was set up for her by Patricia Woodlock and became a success, raising substantial funds for the cause. Flatman organised the publicity surrounding the release of Woodlock, who had completed a prison term in Holloway.
Photograph credit: Harris & Ewing; restored by Adam Cuerden
Source: https://en.wikipedia.org/wiki/Template:POTD/2022-07-31
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Astronomy Picture of the Day - August 10th, 2022 - Dust Clouds of the Pacman Nebula (Narrated by Salli)
Stars can create huge and intricate dust sculptures from the dense and dark molecular clouds from which they are born. The tools the stars use to carve their detailed works are high energy light and fast stellar winds. The heat they generate evaporates the dark molecular dust as well as causing ambient hydrogen gas to disperse and glow red. Pictured here, a new open cluster of stars designated IC 1590 is nearing completion around the intricate interstellar dust structures in the emission nebula NGC 281, dubbed the Pac-man Nebula because of its overall shape. The dust cloud on the upper left is classified as a Bok Globule as it may gravitationally collapse and form a star -- or stars. The Pacman Nebula lies about 10,000 light years away toward the constellation of Cassiopeia.
Image Credit & Copyright: Douglas J. StrubleFuture World Media
Source: https://apod.nasa.gov/apod/ap220810.html
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Wikipedia Picture of the Day - March 9th, 2021 - Philippe Chaperon (Narrated by Salli)
Philippe Chaperon (1823–1906) was a French painter and scenic designer, known particularly for his work at the Paris Opera. This is Chaperon's set design for the third act of Giuseppe Verdi's Rigoletto for an 1885 production of the opera at the Palais Garnier in Paris.
Set design credit: Philippe Chaperon; restored by Adam Cuerden
Source: https://en.wikipedia.org/wiki/Template:POTD/2021-03-09
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