Wednesday, September 11, 2024
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Space is Deep
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The far-southern constellation Tucana is to be found at the end of the celestial river, Eridanus. It represents the large-beaked tropical bird that is native to South and Central America.
Wednesday, September 4, 2024
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Space is Deep
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Astronomers discovered a new “Odd Radio Circle” (a mysterious ring invisible at all wavelengths except radio) near the center of our galaxy. I hope it’s playing space rock.
Wednesday, August 28, 2024
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Space is Deep
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In 1610, Galileo's telescope revealed that the milky smear across the night sky is not a nebula but a field of tiny stars. Immanuel Kent guessed that the stars form a rotating disk and that the Earth is inside it.
Wednesday, August 21, 2024
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Space is Deep
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In 1977 on August 20th, the Voyager 2 spacecraft was launched to visit the outer planets. In Dec. 2018 it passed Neptune and entered interstellar space. Voyager 2 is still transmitting data 47 years later!
Wednesday, August 14, 2024
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Space is Deep
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A dense ball of 10.5 million stars, Omega Centauri is the biggest and brightest of about 200 globular clusters in the Milky Way galaxy. The average distance between its stars is just one tenth of a light year.
Wednesday, August 7, 2024
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Space is Deep
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The sun’s corona can be 200 times hotter than the sun’s surface, despite being farther away from the ultimate source of heat at the sun’s core
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Space is Deep
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Comet Encke was "discovered" in 1786, 1795,1805, and 1818 by different astronomers. These comets were found to be the same only after orbital calculations in 1819 by the German astronomer Johann Encke, who then predicted its return in 1822.
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Space is Deep
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A new look at how light bends as it travels through the universe could point to an alternative theory of gravity
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Space is Deep
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Retrograde motion is an effect of changing perspective. Inferior planets Mercury and Venus show retrograde motion on either side of inferior conjunction. They "overtake" Earth as they pass between Earth and the Sun.
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Space is Deep
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Supermassive black hole winds blowing at 36 million mph can sculpt entire galaxies
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Space is Deep
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First discovered in 1826, the Bug Nebula is one of the brightest planetary nebulae. The central star is thought to have an extremely high temperature, and its intense heat lights up the surrounding stellar material.
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Space is Deep
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Some scientists speculate that the universe is shaped like a doughnut, instead of stretching to infinity. It’s a topology that could eventually be mapped.
