What Is a Protostar?

Protostars are stars in their "primitive state" (celestial bodies in a slow contraction phase). Proto-stars evolved from interstellar clouds (large interstellar clouds with diameters up to thousands of light years) created after the Big Bang. It is a celestial body that appears under the contraction of giant molecular clouds in the interstellar medium, and is an early stage in the formation of stars. For a solar-mass star, this phase lasts at least about 100,000 years. It starts with the increase in the density of the molecular cloud core, ends with the formation of the Taurus T star, and then develops into the main sequence. This phase was ended by the beginning of the Taurus T star, a stellar wind, marking the star's radiation from mass accretion into energy.

The word "protostar" first appeared in a 1889 publication.

"protostar acquiring two condensations will become a binary and be stable thereafter [..] Whether a binary or a single star results depends largely on the total angular momentum of the protostar"

"The acquisition of two concentrates by the protostar will develop into a binary star and be stable. The result is a conjunctive or individual star, depending on the total angular momentum of the protostar ^[1]

A computer simulation of the latest technology provides the most detailed information about the first planets in the universe, such as

As cloud gas continues to shrink, its temperature increases. this is not

Protostar formation is the most fundamental question in the field of astrophysics, because it is common knowledge that must be known to answer many other questions. These problems include the formation of stellar systems and the formation of the solar system. This physical process involves some irregularities

Protostars are very important. Protostars are the main source of radiation, the main source of elements heavier than hydrogen and helium, and the main source of information for the universe. To form a rich environment of heavy elements, we need multiple star births and deaths. In other words, we are all stars

Stars are often found in groups and seem to have formed at the same time, known as star clusters. This can be explained as the density of the cloud gas is not uniform as it contracts. In fact, the first to point out this is Richard Larson. When stars form within a giant molecular cloud, it can be observed that the turbulence velocity increases at all scales in the cloud gas. Speed of these turbulences

Stars , main sequence stars, white dwarfs, brown dwarfs, neutron stars, black holes

	Stellar: It is a massive, bright plasma sphere.
Protostar	Molecular cloud, Baoke ball, early stellar body, Lin Zhongshiro trajectory, Lin Zhongshiro limit, Henye track, Taurus T star Herbig Ae / Be star
development of	Main sequence star, variable star, red giant, horizontal branch, asymptotic giant branch, protoplanetary cloud, planetary nebula, Wolf-Laye star, supernova
feature	UBV color, nuclear synthesis, effective temperature, metal content, rotation, magnetic field, micro turbulence, planetary system, apparent velocity, autonomous parallax, space velocity
structure	Core troposphere, radiation layer, photosphere layer, chromosphere layer, coronal, star wind, star wind bubble
wreckage	Black dwarf, white dwarf, neutron star, pulsar, magnetic star, quark star, strange star, black hole, super heavy black hole

Xinhuanet, Paris, April 12 (Reporter Li Xuemei) The European Space Agency announced on the 12th that the "Herschel" satellite launched by the agency has taken images of giant protostars being formed in the universe. Each of these giant protostars The mass of the grains is more than 10 times that of the sun.

The European Aviation Agency issued a statement on the same day that the "Herschel" satellite took images of the Rose Nebula 5,000 light years from the earth and a larger cloud cluster surrounding it. This cloud is full of dust and gas, enough to form 10,000 stars similar to the sun. As you can see from the image, the clouds are gorgeous and extremely spectacular. The communique said that different colors represent different temperatures of the dust, and their floating range ranges from minus 263 degrees Celsius (only 10 degrees Celsius above absolute zero degrees-minus 273 degrees Celsius) to minus 223 degrees Celsius.

The European Aviation Agency said that the bright spots in the image are giant protostars, that is, stars in the very early stages of evolution. They are wrapped in dust, like silkworm pupae. In the future, these behemoths are likely to form huge stars more than 10 times the mass of the sun. In addition, there are some smaller bright spots in the image. They are relatively small protostars, comparable to the sun.

The communique said that this is the first time that the "Herschel" satellite has photographed such a huge protostar, which is very important for studying the formation process of giant stars.

The Herschel satellite is the largest far-infrared space telescope ever launched by humans, and is mainly used to study the formation of stars and galaxies. In May 2009, it launched with the cosmic radiation detection satellite "Planck" from the Courou Space Center, French Guiana.

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