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Stellar mass loss is a phenomenon observed in stars by which stars lose some mass over their lives. Mass loss can be caused by triggering events that cause the sudden ejection of a large portion of the star's mass. It can also occur when a star gradually loses material to a binary companion or due to strong stellar winds. Massive stars are ...
[clarification needed] One possible explanation of this concentration is the Hercules–Corona Borealis Great Wall. [8] [9] The wall has a mean size in excess of 2 billion to 3 billion parsecs (6 to 10 billion light-years). [5] Such a supercluster can explain the significant distribution of GRBs because of its tie to star formation.
A leading critic of the Alvarez hypothesis is Gerta Keller, who has focused on Deccan Traps volcanism as a likely cause of a more gradual extinction. [14] Despite the fact that the Alvarez hypothesis has overwhelming support from the scientific community, [15] Keller has continued to advocate for research into alternate theories. [14]
Planetary migration is the most likely explanation for hot Jupiters (exoplanets with Jovian masses but orbits of only a few days). The generally accepted theory of planet formation from a protoplanetary disk predicts that such planets cannot form so close to their stars, as there is insufficient mass at such small radii and the temperature is ...
Simulated collision of two neutron stars. A stellar collision is the coming together of two stars [1] caused by stellar dynamics within a star cluster, or by the orbital decay of a binary star due to stellar mass loss or gravitational radiation, or by other mechanisms not yet well understood.
The mysterious dimming of a star had been attributed to an extraterrestrial civilization at one point but appears to have another explanation. NASA: Mysterious star’s unusual dimming likely due ...
Instead, the contraction caused by pair-creation provokes increased thermonuclear activity within the star that repulses the inward pressure and returns the star to equilibrium. It is thought that stars of this size undergo a series of these pulses until they shed sufficient mass to drop below 100 solar masses, at which point they are no longer ...
The lunar atmosphere is extremely thin and technically classified as an exosphere, meaning atoms do not collide with each other because their numbers are so sparse, in contrast to Earth's thick ...