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Pluto – the exiled king of the outer Solar System Officially the largest resident of the Kuiper Belt, but in 2006 the International Astronomical Union brutally demoted it from “planet” to “dwarf planet” and the internet has never recovered from the heartbreak Right now, depending on where Earth and...

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Black Hole

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79,315 Aufrufe • vor 8 Monaten •via X (Twitter)

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Wherever you are on planet Earth, Adenot Sophie has a message for you: "This solar eclipse is a beautiful reminder of the clockwork of our Solar System. Enjoy it. Stay curious." Our European Space Agency astronaut is watching the eclipse from the Cupola windows on the International International Space Station 🫶

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The fastest star in the Galaxy is S4714, which accelerates to approximately 24,000 km/s at its peak, or about 8% the speed of light. It orbits the supermassive black hole Sagittarius A* at the center of our Milky Way, moving in an extremely eccentric orbit. At its closest approach, it comes to a distance of approximately 1.8 billion km from the black hole—comparable to the distance from the Sun to Saturn. From this distance, the angular size of the "shadow" of Sagittarius A* is four times larger than the angular size of the Sun in Earth's sky! Observations of S4714, conducted with the European Southern Observatory, are helping to test the effects of general relativity in the extreme gravity of the Galactic center.
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ELON MUSK: "The most obvious one is actually solar powered AI satellites, sort of to move the AI to orbit and essentially deep space over time, because there you can actually access over a billion times more energy from the sun in deep space than you can on Earth. The scaling to Kardashev, which is using some non trivial amount of energy from the sun. You kind of have to do space solar power. Like to even use a millionth of a percent of the sun's energy you you really have to be have your solar power in deep space."
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ELON MUSK: "The most obvious one is actually solar powered AI satellites, sort of to move the AI to orbit and essentially deep space over time, because there you can actually access over a billion times more energy from the sun in deep space than you can on Earth. The scaling to Kardashev, which is using some non trivial amount of energy from the sun. You kind of have to do space solar power. Like to even use a millionth of a percent of the sun's energy you you really have to be have your solar power in deep space."

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This is how fast Earth flies through the galaxy. The solar system, including Earth, revolves around the center of the Milky Way at a speed of about 230 km/s. At first glance, this seems impressive. But when compared to the diameter of our planet (approximately 12,750 km), on a cosmic scale, it all looks almost like slow motion.

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In 1930, Clyde Tombaugh from Burdett, Kansas, discovered Pluto, & I appreciate NASA Administrator Jared Isaacman’s interest in reclassifying Pluto as a planet and restoring credit for the discovery of the planet to Clyde Tombaugh.⬇️
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