Wednesday, September 4, 2024
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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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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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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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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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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...
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Albireo is regarded as one of the finest multiple star systems in the night sky. It consists of a golden-colored giant star and a cooler blue-dwarf star. Albireo is easily separated through a small telescope.
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The total solar eclipse was awesome!
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Little is known about dark energy, except that it's repulsive. This strange force causes matter to scatter rather than attract. Dark energy makes up 68% of the universe's mass-energy density.
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The Heliosphere - made of solar wind, solar transients, and the interplanetary magnetic field, acts as our solar system’s personal shield- protecting the planets by absorbing potentially damaging galactic cosmic rays.
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Enaiposha is 3 times bigger and 8 times as massive as Earth. The planet's density means a chunk of it must be lighter than rock but heavier than gas. It is likely that Enaiposha is a water world.
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A star system located 3,000 light-years away called T Coronae Borealis is predicted to go nova between now & Sept. These Outbursts happen approx every 80 years, and can be seen with the naked eye
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3C 273 is the brightest quasar in the sky and the second to be discovered. In 1963, Cyril Hazard used an occultation by the moon to establish its position.
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The Galactic Winds of Change have blown us to 4am - wake up call #1
Wednesday, February 28, 2024
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The Carina Nebula boasts three rare Wolf-Rayets (WR), the hottest stars in the universe. They illuminate and ionize a dark nebula called a Bok globule.
Wednesday, February 21, 2024
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A defunct school bus sized Eurpoean satellite launched in 1995 will crash into the earth’s atmosphere sometime this week - most likely Wednesday morning.
Wednesday, February 14, 2024
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Unusually, Gamma Velorum, a blue star, has been recently renamed. Its new name Regor, "Roger" backwards, honors Roger Chaffee, an astronaut who died in the Apollo 1 fire.
Wednesday, February 7, 2024
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It takes a long time to travel across the universe - here’s some long songs to help pass the time
Wednesday, January 31, 2024
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The Cat's Eye nebula is one of the most complex of all planetary nebulae, possibly due to the interaction of a close binary system at its center.
Wednesday, January 24, 2024
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Analyzing cosmic nothing might explain everything - “empty” areas of the universe called voids could solve the cosmos’ greatest mysteries.
Wednesday, January 17, 2024
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Puppis is a rich southern constellation straddlng the Milky Way that was originally part of the ancient Greek constellation of Argo Navis until it was divided into three parts in the 18th century
