Sky & Telescope Magazine
Exploding Stars Sprinkled Ancient Earth With Radioactive Iron and Plutonium
Exploding stars have left their radioactive mark on our planet. Now scientists have found more evidence of a particularly violent event in Earth’s more ancient past.
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Double Whammy: Binary Supernova in Gemini
New analysis reveals a tight relationship between two supernova remnants in the outer Milky Way.
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Interstellar Comet 3I/ATLAS Has Cold, Ancient Origins
The most recent interstellar visitor was crisscrossing our galaxy for some 10 to 12 billion years before it came near the Sun.
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Lucy's First Asteroid Flyby Sheds Light on a Double-lobed Asteroid
On its way to future encounters with Trojan asteroids, the Lucy spacecraft made a practice run past tiny asteroid 52246 Donaldjohanson on April 20, 2025. Now, the Lucy team, led […]
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This Week's Sky at a Glance, June 19 – 28
The Moon as it will appear in an amateur telescope at 10 p.m. EDT Friday the 19th. This week Venus and Jupiter continue moving apart low in the western twilight. Vega and Arcturus shine equally high after dark. And watch Beta Lyrae self-eclipse.
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“Shadow Blaster” Galaxy Might Have Sent High-Energy Neutrino to Earth
A star-forming galaxy in the early universe might have sent a ghostly particle known as a neutrino crashing into the ice at Earth’s South Pole, after an 11 billion-year journey through space.
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