Wednesday, November 6, 2024
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When a planet passes in front of a star, the starlight passes through the planet's atmosphere. Lines in the resulting spectrum occur where different elements absorb light at characteristic energies, indicating the composition of the planet's atmosphere.
Wednesday, October 30, 2024
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Space is Deep
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The chance for a spooky Halloween comet sighting will not happen. The comet known as C/2024 S1 didn’t survive it’s rendezvous with the sun, as it broke apart at parahelion.
Wednesday, October 23, 2024
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Space is Deep
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Wednesday, October 16, 2024
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Space is Deep
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For those in the Northern hemisphere, the next weeks are our best chance to see Comet A3, which came from the Oort Cloud, and won’t be back for 80,000 years
Wednesday, October 9, 2024
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Space is Deep
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The constellations Carina, Vela, and Puppis make up Argo Navis, the mythical ship. Argo Navis was one of the 48 constellations listed in the Almagest.
Wednesday, October 2, 2024
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A 13 year survey conducted by the VISTA telescope has created the most detailed map of the Milky Way ever. It contains an incredible 1.5 billion objects
Wednesday, September 25, 2024
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Space is Deep
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The observable universe is the spherical region around Earth from which light has had time to reach us since the universe began. The boundary is called the cosmic light horizon.
Wednesday, September 18, 2024
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Space is Deep
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Researchers have found evidence suggesting the Earth may have had a ring system 466 million years ago
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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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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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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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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Supermassive black hole winds blowing at 36 million mph can sculpt entire galaxies
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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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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.
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RCW 49 is one of the most productive regions of star formation to have been found in the Milky Way. It spans a distance of about 350 light-years, and it is thought that over 2200 stars reside within it.
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New discoveries from the far reaches of space
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Camelopardalis is a dim constellation of the far northern sky, representing a giraffe. The giraffe's long neck can be visualized as stretching around the north celestial pole toward Ursa Minor and Draco.
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The Multiverse could be much much bigger than we ever imagined
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The Horsehead Nebula is lit by a quintuple star system that bathes the clouds in UV light. Sigma Ordonis A and B are an orbiting pair of blue stars; C,D, and E will eventually spin off as solo stars
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Astronomers just discovered WASP-193b, an extremely low-density giant planet orbiting a sun-like star 1200 light-years from Earth. WASP-193b is 50% larger than Jupiter, but 7 times less massive, giving it a density comparable to cotton candy
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NASA has created a visualization of what it would be like to fall into a black hole. It is worth those 40 seconds of your life.
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Exploding Stars, Black Hole Outbursts, Gamma-rays & Dark Matter...
