Stellar Phenomena
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SteveO1
Technology and cars
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ASTRONOMY
Stellar Phenomena
Variable Star Observation
Pulsating stars reveal hidden rhythms that map the universe's vast distances
3 days ago
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What is a key difference between intrinsic and extrinsic variable stars in terms of their brightness changes?
Intrinsic variables change brightness due to internal physical changes, while extrinsic variables change brightness due to external factors like eclipses.
Intrinsic variables change brightness because of orbiting companions, while extrinsic variables change due to internal pulsations.
Both intrinsic and extrinsic variables change brightness only because of their distance from Earth varying over time.
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Steeeve
Steeeve is an IT guru
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ASTRONOMY
Stellar Phenomena
Crab Nebula
A cosmic explosion from 1054 still powers a dazzling nebula visible today
3 days ago
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What is the primary source of the Crab Nebula's ongoing energy and radiation?
Continuous fusion reactions within the nebula's gas clouds
A rapidly spinning neutron star (pulsar) left by the supernova
Reflection of light from nearby stars illuminating the nebula
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SteveO1
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ASTRONOMY
Stellar Phenomena
Stellar Flares
Stellar flares unleash powerful bursts of energy that can shape the environments of distant star systems
20 Jan 2026
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What is the primary cause of stellar flares on stars like red dwarfs?
Nuclear fusion reactions suddenly increasing in the star's core
Magnetic reconnection releasing stored magnetic energy
Gravitational collapse of the star's outer layers
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