Discuss the formation of stars from clouds of gas and dust in the interstellar medium. Discuss...

Discuss the formation of stars from clouds of gas and dust in the interstellar medium. Discuss the various stages of stellar formation in as much detail as possible, and explain why massive stars form very quickly, and low-mass stars form very slowly. Describe how the stars reach the Main Sequence, and why Main Sequence stars hardly change over long periods of time. Discuss how long different mass stars remain Main Sequence stars.

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genius_generous answered 2 years ago

Interstellar gas in many galaxies is in virial equilibrium with the stars, in that the rms...

Interstellar gas in many galaxies is in virial equilibrium with the stars, in that the rms speed of the gas particles is the same as the rms stellar speed. Consider a large elliptical galaxy with a virial radius of 150 kpc and a mass of 5 × 1012 solar masses. Calculate the rms stellar velocity using the virial theorem. Hence estimate the temperature of the interstellar gas, assuming that it is composed entirely of hydrogen.

What advantage do astronomers gain by studying interstellar gas and dust? What wavelengths of light are...

What advantage do astronomers gain by studying interstellar gas and dust? What wavelengths of light are used to study these regions and why?

If there was a lot of interstellar dust between a supernova and us, how would that...

If there was a lot of interstellar dust between a supernova and us, how would that affect the observed brightness of the supernova(compared to the brightness of the supernova in the absence of dust)? Would the distance to a dust-obscured supernova be measured to be too high or too low (assuming no correction was made for the presence of the dust)? Since interstellar dust might make the calculated distances to some SNe incorrect (which would result in bad determinations of...

second stage of fusion: medium/high mass stars: what type of degeneracy do medium mass stars use...

second stage of fusion: medium/high mass stars: what type of degeneracy do medium mass stars use to stop further collapse of the core? What do we call the moment when the second stage of fusion begins for medium mass stars? do other stars have or need degeneracy to ignite the second stage of fusion?

.) At the average density of the interstellar medium, 1 atom per cm3, how big a...

.) At the average density of the interstellar medium, 1 atom per cm3, how big a volume of material must be used to make a star with the mass of the Sun? What is the radius of a sphere this size? Express your answer in light-years.

Explain the hydrogen atom's "galactic recycling" process, from molecular cloud to star to interstellar gas back...

Explain the hydrogen atom's "galactic recycling" process, from molecular cloud to star to interstellar gas back to molecular cloud.

Does the observed color of a star show evidence of an interstellar medium? Justify your answer

If you were to observe the interstellar medium over time, you would notice an increase of...

If you were to observe the interstellar medium over time, you would notice an increase of heavy elements. Why does this happen? What is the evidence for dark matter? How are stars orbiting Sagittarius A* evidence of it being a supermassive black hole? Dark matter helps create the structure in the universe by causing galaxies to do what? Question 17 options: A.cluster along filaments of high galaxy density while creating voids with few galaxies. B.cluster into spherical clumps of galaxies...

Within the disc of gas and dust that surrounded the protoSun there was a radial temperature...

Within the disc of gas and dust that surrounded the protoSun there was a radial temperature gradient outwards to the edge of the disc. Describe the sequence of events that led to the beginning of planet formation (i.e. when planetary embryos were colliding). and the effect the temperature gradient had on this process. (About 150 words)

Discuss the transmission and reﬂection of electromagnetic wave from a lossless medium to a lossy medium,...

Discuss the transmission and reﬂection of electromagnetic wave from a lossless medium to a lossy medium, normal incidence.

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