Definitions
Wiktionary
- n. astronomy A collection of gas and dust in space with high temperature that usually grows to the point of beginning nuclear fusion and becoming a star.
Examples
“Since then, stars have formed by the collapse of small, dense core regions in large, cold protostar, which is hot and bright because of energy generated by gravitational contraction.”
“Another unsurprising confirmation of stellar formation models is that forming cores in the nebula are notably warmer when they've reached the density sufficient to create fusion in the core and have an embedded protostar.”
New Studies on the Vela Star Forming Region | Universe Today
“With this new movie, we can see changes over just a few months as gas clumps swarm around this young protostar, added Smithsonian astronomer and co-author Ciriaco Goddi.”
“The bending path of these masers provides key evidence that magnetic fields may be influencing gas motions very close to the protostar," pointed out Claire Chandler of NRAO, a co-principal investigator of the study.”
“Some masers were as close to the protostar as Jupiter is to our Sun, which is also a record.”
“The resulting movie reveals signs of a rotating accretion disk, where gas is swirling closer and closer to the protostar at the center.”
“It took some 10,000 years for outward gas pressure to balance against gravitational contraction, then another 10 million years for the protostar to condense just enough to create what became our sun, whose interior pressures forced a sustained hydrogen fusion reaction at 10 million degrees.”
The Wall Street Journal: ‘The Fallen Sky: An Intimate History of Shooting Stars'
“The presolar nebula's contraction, the outward pressure of the protostar, then of the sun, and the rotation of the entire ensemble led to a complicated dance of creation.”
The Wall Street Journal: ‘The Fallen Sky: An Intimate History of Shooting Stars'
“The heart of the presolar nebula began to quicken, and within a few thousand years a protostar — not yet fusing hydrogen — went through phases of contraction, expansion, and varied brightness.”
The Wall Street Journal: ‘The Fallen Sky: An Intimate History of Shooting Stars'
“We can see the knots in a jet from a protostar actually moving over the course of a couple of years.”
Learn: Identify constellations, stars, planets and how to navigate at night
Lists
These user-created lists contain the word ‘protostar’.
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science fact or fiction
pretty open-ended here—terms, ideas, lingo, technologies and phenomena (real or postulated) that are, were, should be or could be used in speculative fiction
tachyon, mecha, dropship, wetware, meatspace, nanobot, cloned meat, asteroid mining, hyperdrive, wormhole, parallel universe, distributed intel... and 471 more...
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astronomical
heat death, End of Greatness, dark flow, Lyman-alpha forest, supervoid, redshift, weakly interactin..., robust associatio..., light dark matter, dark matter halo, Great Attractor, warm dark matter and 101 more...
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My God, It's Full of Stars!
stellar black hole, micro black hole, black hole, collapsar, hypernova, supernova, nova, variable star, stellar core, strange star, quark star, compact star and 37 more...
Tweets
Looking for tweets for protostar.
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