Transient and explosive astronomical phenomena constitute a research area focused on short-lived, high-energy events in the universe, such as supernovae, gamma-ray bursts, tidal disruption events, kilonovae, and fast radio bursts. This field investigates the underlying physical mechanisms driving rapid energy release, including relativistic jets, shock breakout, nucleosynthesis, compact object mergers, and accretion-induced instabilities. Research integrates multiwavelength and multimessenger observations (electromagnetic spectra, gravitational waves, neutrinos) with numerical simulations and theoretical modeling to constrain progenitor systems, energy budgets, radiative transfer processes, and environmental impact, including feedback on galactic evolution and the production of heavy elements.
We know that regular supernovas pose no existential threat to life on Earth in the near-term. But there are other varieties of supernova that are a little bit harder to predict, and a little bit harder to spot.
Astronomy
Mar 20, 2025
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The most dangerous parts of a supernova explosion are the outputs like X-rays and gamma rays. Even though they only share a small fraction of a supernova's power, they are extremely dangerous. But they're not going to disintegrate ...
Astronomy
Mar 19, 2025
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What's the deadliest part of a supernova explosion? To estimate this we have to look at what the actual destructive capabilities are of a supernova. As in, what does a supernova produce? And how deadly are those products ...
Astronomy
Mar 18, 2025
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At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova explosions, a new study suggests.
Astrobiology
Mar 13, 2025
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Explosions in the sky and explosions on land are literally worlds apart. A supernova and a land mine explosion don't seem like they would have much in common. But at the fine level, their mechanisms are not so different: ...
Astronomy
Mar 6, 2025
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Nova explosions occur in binary star systems in which a white dwarf—the dense remnant of a dead star—continually siphons stellar material from a nearby companion star. As the outer atmosphere of the companion gathers onto ...
Astronomy
Mar 5, 2025
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In this NASA/ESA Hubble Space Telescope image, Hubble once again lifts the veil on a famous—and frequently photographed—supernova remnant: the Veil Nebula. The remnant of a star roughly 20 times as massive as the sun that ...
Astronomy
Mar 3, 2025
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Chinese astronomers have analyzed the data from NASA's Swift observatory, which extensively observed an outburst of the cataclysmic variable system known as GK Persei. Results of the study, published February 20 on the arXiv ...
Isolated by mountains along the East African Rift is Lake Tanganyika. More than 400 miles long, it is the continent's deepest lake and accounts for 16% of the world's available freshwater. Between 2 and 3 million years ago, ...
Astrobiology
Feb 19, 2025
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The "needle in the haystack" discovery of a powerful explosion from a mysterious unknown object outside our galaxy has excited astronomers.
Astronomy
Feb 17, 2025
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