In the context of physical phenomena, a flare is a transient, intense increase in electromagnetic radiation and often particle emission from an astrophysical object, typically associated with rapid energy release in a magnetized plasma. Solar and stellar flares arise from magnetic reconnection in the corona, converting stored magnetic energy into heating, particle acceleration, and broadband radiation from radio to gamma rays on timescales of seconds to hours. Flares are characterized by impulsive and gradual phases, nonthermal electron and ion populations, and can drive associated phenomena such as coronal mass ejections, shock waves, and disturbances in surrounding magnetized environments.
The most massive stars in the universe are destined to explode as brilliant supernova before collapsing into black holes. Yet one huge star appears to have never fulfilled its destiny; in a twist of irony, the star wandered ...
Astronomy
Nov 4, 2025
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For the first time, scientists have the calculations and simulations to explain mysterious flashes from the galaxy OJ 287. Roughly twice every 12 years, from 3.5 billion light years away, the light equivalent of 1 trillion ...
Astronomy
Oct 29, 2025
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The sun is frequently ejecting huge masses of plasma, called coronal mass ejections (CMEs), into space. They often occur together with sudden brightenings called flares, and sometimes extend far enough to disturb Earth's ...
Astronomy
Oct 27, 2025
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Using ESA's INTEGRAL spacecraft, astronomers have detected exceptionally bright X-ray flares from the Cygnus X-1 X-ray binary system. This is the first time that such strong flaring activity has been observed in this system ...
The European Space Agency-led Solar Orbiter mission has split the flood of energetic particles flung out into space from the sun into two groups, tracing each back to a different kind of outburst from our star.
Astronomy
Sep 1, 2025
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New research led by Southwest Research Institute (SwRI) has confirmed decades-old theoretical models of magnetic reconnection, the process that releases stored magnetic energy to drive solar flares, coronal mass ejections ...
Astronomy
Aug 18, 2025
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392
Lightning might not strike twice, but black holes apparently do. An international group of researchers led by Tel Aviv University astronomers observed a flare caused when a star falls onto a black hole and is destroyed.
Astronomy
Jul 21, 2025
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Some exoplanets in their stars' habitable zones may be distinctly uninhabitable due to solar flaring. Red dwarfs are known for powerful flaring, and since they're dim and their habitable zones are close to the star, these ...
Planetary Sciences
Jul 10, 2025
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Astronomers using the European Space Agency's Cheops mission have caught an exoplanet that seems to be triggering flares of radiation from the star it orbits. These tremendous explosions are blasting away the planet's wispy ...
Astronomy
Jul 2, 2025
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A SpaceX rocket being tested in Texas exploded Wednesday night, sending a dramatic fireball high into the sky.
Space Exploration
Jun 19, 2025
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