Wikipedia Picture of the Day - December 21st, 2019 - Black hole (Narrated by Amy) A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing – no particles or even electromagnetic radiation such as light – can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed. This picture is a photograph of the shadow of the supermassive black hole at the centre of the Messier 87 (M87) elliptical galaxy in the constellation Virgo, as captured on 11 April 2017 by the Event Horizon Telescope, a planet-scale array of eight ground-based radio telescopes, a collaborative effort by scientists from over 20 countries; the photograph itself was released on 10 April 2019. As a black hole is a completely dark object from which no light escapes, its shadow is the next best alternative to an image of the black hole itself. The event horizon, from which the telescope takes its name, is around 2.5 times smaller than the shadow it casts and measures just under 40 billion kilometres (25 billion miles) across. Photograph credit: Event Horizon Telescope Source: https://en.wikipedia.org/wiki/Template:POTD/2019-12-21 This video was auto generated using data and media from Wikipedia. ... https://www.youtube.com/watch?v=swRV_wrwn88

Wikipedia Picture of the Day - November 3rd, 2021 - Anne Dallas Dudley (Narrated by Matthew) Anne Dallas Dudley (November 13, 1876 – September 13, 1955) was a prominent activist in the women's suffrage movement in the United States. In 1917, she became the third vice president of the National American Woman Suffrage Association, where she contributed significantly to advancing legislation on the issue of women's suffrage. In 1920, along with several others, she led the campaign in Tennessee to approve ratification of the Nineteenth Amendment to the US Constitution. As a result, Tennessee became the 36th and deciding state to ratify the amendment, thereby giving women the right to vote throughout the country. Photograph credit: Bain News Service Source: https://en.wikipedia.org/wiki/Template:POTD/2021-11-03 This video was auto generated using data and media from Wikipedia. ... https://www.youtube.com/watch?v=N0jE6MypYiI