A Protostar is the first stage of a star’s life after an event of some form has caused a nebula of dust and cloud to collapse. It has not yet built enough mass to fuse hydrogen to helium.
After the protostar phase, the life cycle of an average star starts with a yellow dwarf phase. The Sun is an example of a yellow dwarf, also known as a main-sequence star. When a star begins its main sequence life, it is fusing hydrogen to helium within the core. Throughout the life...
KerryR
Betelgeuse is the brightest star in our nighttime sky. Polaris is the North Star. Substitute the text for true and false statements in the proper entries. Make sure you did not wipe out the text properties. Otherwise, you will lose the link to the response slides and you will have to re...
What is solar nebula? What are circumpolar stars and what is an example? What is Proxima Centauri? What is stellar nucleosynthesis? What are the stars in constellation Phoenix? What kind of spectra does a Hubble Telescope have? What is a protostar?
What is a protostar made of? Which comet is faster: Halley's Comet or Comet Encke? How big is Lexell's Comet? What has been hypothesized to originate in the Oort cloud? What years did Halley's Comet appear? What does Halley's Comet tell us about the solar system?
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CosmoJoe
The main sequence stage occurs after a stellar nebula collapses due to the force of gravity. As the nebula collapses, the internal temperature increases. When the core of the newly-formed protostar reaches a certain temperature, nuclear fusion starts. Nuclear fusion is a nuclear reaction that rele...
aLife is what we make it. 正在翻译,请等待... [translate] aChicto Chicto [translate] aprotostar protostar [translate] aIn recent years, the employment of college students is rare phenomenon, the phenomenon and I think there are a variety of reasons. First, college students aim too high, ...