Triton is Neptune’s largest moon today, but it was once the undisputed king of the Kuiper belt. Here’s why the outer…
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Newton’s gravitational constant, G, is still known to just 3 significant figures in 2026. New measurements merely highlight our… Continue reading…
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It takes incredible energies to accelerate masses near the speed of light. So how do the farthest galaxies speed away from…
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In 2006, Pluto was controversially demoted to “dwarf planet” by the IAU. Unless you ignore most of astrophysics, it won’t ever…
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Today, we have the Standard Model of particles with four fundamental forces governing them. But things weren’t always the way they…
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Many facts are well-known to professionals, but are unappreciated or even rejected outright by the public. “How stars work” takes the…
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On cosmic scales, only dark matter (or something equivalent) gives us the Universe we observe. Now, the Sunyaev-Zel’dovich effect agrees. Continue…
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Every time a new star forms, there’s an opportunity to form planets alongside and around it. How does it happen, and…
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From 2004 through 2017, Saturn was imaged many times and from many angles up close by Cassini. This new viral image…
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By looking at a giant, remarkable, edge-on protoplanetary system, astronomers have found a proto-protoplanet for the first time. Continue reading on…