The discovery of a rare Einstein Cross — five images of the same galaxy — reveals a trillion-solar-mass dark matter clump.
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Space News & Blog Articles
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In a move that’s concerning astronomers and environmental groups alike, the Federal Communications Commission (FCC) has proposed reducing environmental oversight of space-based operations.
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On these dark evenings the Perseus Double Cluster and the Andromeda Galaxy, M31, await in the northeast. They're only two fist-widths apart.
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Astronomers using the James Webb Space Telescope have confirmed that, just 800 million years after the Big Bang, there is a galaxy that contains a supermassive black hole — and not much else.
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Titan joins its shadow for a "grand finale" this October.
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A surge of asteroids might have peppered the inner solar system some 800 million years ago, in a short-lived shower that left its mark — literally — on Earth and its neighbors.
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Ukrainian amateur discovers a bright, new comet now in the evening sky.
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The LIGO gravitational-wave detector celebrates its 10th birthday with the clearest signal yet from a pair of merging black holes.
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See the images that won the 2025 Astronomy Photographer of the Year award.
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Venus has double close conjunctions with the crescent Moon and Regulus in the dawn next Friday the 19th. Meanwhile, Saturn and Neptune are coming to opposition.
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The Perseverance has found compounds associated with life on Earth. But whether they indicate life on Mars awaits sample return.
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S&T editors attended star parties in the past months in various locations around the country to observe with fellow stargazers.
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Reflect Orbital plans to launch gigantic satellites to reflect sunlight into regions where night has already fallen, potentially harming eyes, altering sleep, and blocking the starry sky.
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New observations reveal turbulent flows in the supernova remnant Cassiopeia A and in the solar corona.
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The number of gravitational-wave signals has just doubled with the release of the newest catalog of events.
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Whether you end up catching a falling star or not, meteor shower vigils offer time with the stars.
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September’s night sky features the iconic Summer Triangle, almost directly overhead at nightfall, and a newcomer to the evening sky: the planet Saturn, which will rise in the east not long after sunset. Get tips for viewing these and lots more stargazing info by downloading this month’s Sky Tour podcast!
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The European spacecraft en route to Jupiter, named JUICE, completed its only flyby of the planet Venus
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Jupiter, Venus, and Mercury continue at dawn. The evening Moon meets Saturn while Fomalhaut looks on. Saturn's own biggest moon casts its shadow onto Saturn's globe, for one of the last times for the next 15 years.
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On September 2nd, Sky & Telescope will launch subscription access to our online articles. Subscribe to get full digital access to the website and magazine!
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Astronomers have pinpointed the location of an one-time fast radio burst to a spiral arm of a nearby galaxy.
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