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If a crewed spacecraft could be built to travel at or near the speed of light, how long would it take to achieve that speed without crushing the human occupants? Lawrence SchwabPhoenix, Arizona Despite what science fiction may suggest, humanity will never be able to travel at the speed of light. That said, we could theoreticallyContinue reading "Ask Astro: How fast could a ship reach light-speed without crushing its human occupants?"
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Following the July 2022 release of the first James Webb Space Telescope (JWST) images — a haunting deep field of galaxies, its stunning picture of the Carina Nebula, the captivating beauty of Stephan’s Quintet and the Southern Ring Nebula — a flurry of other space images started widely circulating across social media platforms. That wasContinue reading "Astronomical hoaxes throughout the ages"
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Friday, May 26With the waxing Moon in the west after sunset, let’s concentrate our gaze east, where the cross-shaped constellation Cygnus is rising. About two hours after sunset, the Swan has sufficiently cleared the horizon for observers to seek out one of its many deep-sky treasures: The North America Nebula. Also cataloged as NGC 7000,Continue reading "The Sky This Week from May 26 to June 2: Mars buzzes the Beehive"
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Can isolated black holes account for dark matter? Rick PinsonLong Beach, California Astronomers estimate about 100 million black holes wander the Milky Way. Since black holes emit no light, we rely on indirect methods to infer their presence. The first method is to search for a black hole’s gravitational influence on nearby objects, such asContinue reading "Ask Astro: Could isolated black holes be dark matter?"
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Quito, the capital city of Ecuador, is perched on the mountainous backbone of the Andes, which run through the center of this equatorial nation on the northwest shoulder of South America. Although February is the wet season, but it isn’t raining today so people lounge near a pond in Parque Alameda, with fountains spraying jetsContinue reading "A visit to Ecuador’s astronomical center"
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When a massive star dies, it goes out with a bang, creating a stunningly bright explosion that can temporarily change the look of the night sky. The brightest and closest may be visible with the naked eye, but even those in distant galaxies can be easily spotted with amateur equipment from your backyard. And now,Continue reading "Bright, young supernova now visible in M101"
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For many of us, light pollution has robbed our skies of once readily visible objects. That’s why many residential observers have turned away from nebulae and galaxies to pursue other targets, such as double stars. This month, let’s enjoy a few of my favorite springtime binocular binaries. We begin with a challenging binocular target, IotaContinue reading "Binocular Universe: Double duty"
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Astronomical websites and press releases brim with pictures of swirling gas giants, watery terrestrial worlds, and strange planetary systems with exotic suns. But just how realistic are these artist’s concepts? Do they truly show newly discovered worlds, or are they simply fanciful pictures meant to draw you into reading about the latest addition to theContinue reading "How do we draw alien planets?"
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Hi folks, tune in every week of 2023 for the best in astronomy from Astronomy Editor Dave Eicher, brought to you by Celestron. Dave’s weekly video series will cover all the latest sky events, scientific results, overviews of cosmic mysteries, and more! This week, we’re talking about dark nebulae — objects in the night skyContinue reading "What are dark nebulae? This Week in Astronomy with Dave Eicher"
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After a three-year hiatus, scientists in the U.S. have just turned on detectors capable of measuring gravitational waves – tiny ripples in space itself that travel through the universe. Unlike light waves, gravitational waves are nearly unimpeded by the galaxies, stars, gas and dust that fill the universe. This means that by measuring gravitational waves,Continue reading "Gravitational wave detector LIGO is back online after three years of upgrades"
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