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asd.gsfc.nasa.gov
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| | | | I get a lot of questions asking why the James Webb Space Telescope is infrared, and how its images can hope to compare to the (primarily) optical Hubble Space Telescope. Why would NASA build something that isn't going to capture beautiful images exactly like Hubble does? The short answer to this is that JWST will absolutely capture beautiful images of the universe, even if it won't see exactly what Hubble does. (Spoiler: it will see a lot of things even better.) There are legit scientific reasons for JWS... | |
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profmattstrassler.com
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| | | | No theoretical physicist is surprised by the news that anti-atoms, just like ordinary atoms, fall down under the Earth's gravity. Here's why. | |
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4gravitons.com
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| | | | Last week I talked about the history of neutrinos. Neutrinos come in three types, or "flavors". Electron neutrinos are the easiest: they're produced alongside electrons and positrons in the different types of beta decay. Electrons have more massive cousins, called muon and tau particles. As it turns out, each of these cousins has a corresponding... | |
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science.nasa.gov
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| | Editor's Note: This post highlights data from Webb science in progress, which has not yet been through the peer-review process. In November 2023, NASA's James Webb Space Telescope observed a massive cluster of galaxies named MACS J0138.0-2155. Through an effect called gravitational lensing, first predicted by Albert Einstein, a distant galaxy named MRG-M0138 appears warped by ... |