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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
