Describe the forces acting on a star during the main sequence period of its life?

Q: Star A and Star B are both on the main sequence. Star A is 74 times more luminous than Star B. What…

A:

Q: of a star occur

A: Possible stages of a star that occurs are as follows:

Q: The mass-luminosity relation describes the mathematical relationship between luminosity and mass for…

A: L/Lo = (M/Mo )3.5  here the luminosity is to be found in terms of Lo  M = 4Mo

Q: Nuclear fusion occurs during most of a star's life O True False

A: Answer :- ---------- True  Nuclear fusion occurs during most of a stars life. Because  It is the…

Q: Multiple choice a)  After about 10 billion years on the main sequence a one solar mass star will…

A: A star is a celestial body made up of a bright sphere of plasma that is kept together by gravity.

Q: require(s) that a young hot star (T ≥ 25,000 K) be relatively nearby.

A: Correct answer is Emission nebula

Q: A nova is an event, not a stellar object. (True or false)

A: It is True. A nova  is a transient astronomical event that causes the sudden appearance of a bright,…

Q: Which elements are created in stellar nucleosynthesis? (Select all that apply) - oxygen - helium…

A: Among the elements listed, hydrogen and helium were created during big band and the rest of the…

Q: Put the steps of the life cycle of a star in order.

A: Required :  Steps involved in star cycle.

Q: If the main-sequence mass lower limit is 0.08 solar mass and the brightest main-sequence stars are 1…

A: The Main Sequence Stars are a mass sequence, with low mass stars forming an equilibrium with a cool…

Q: Describe the entire life of a very large star.

A: The life cycle of the very large star is illustrated in the diagram shown below:

Q: The luminosity of Spica is about 5x1030 Joules/second. A mass MH of Hydrogen that undergoes…

A:

Q: mass–luminosity relation

A: The Answer to the above statement can be outlined as follows:-

Q: Match the stars to their typical lifetimes on the main sequence. O Instructions 15 solar masses 1…

A:

Q: 1141|1 Section Three - Understanding Main Ideas Low Mass Star Dust C. --0- 1. Red giant 2. Protostar…

A:

Q: Pls help ASAP. Pls show all work.

A: Given context: Life cycle of Low mass star: A low mass star life starts from a "Zero-Age Main…

Q: The mass-luminosity relation describes the mathematical relationship between luminosity and mass for…

A:

Q: What causes a star to move off the main sequence?

A:

Q: The life-cycle path followed by a star is determined by the star’s initial  A. mass and size B.…

A: Star's mass is inversely proportional to its life cycle.

Q: The luminosity of Spica is about 5x1030 Joules/second. A mass MH of Hydrogen that undergoes…

A:

Q: Why is it, that a star which uses up the hydrogen in its core, swells to enormous size and changes…

A: Required : Why does a star which uses up the hydrogen swells to enormous size and changes color.

Q: Why is iron significant to understanding how a supernova occurs? A. Iron is the heaviest of all…

A:

Q: Based on what you know about main-sequence stars, select all of the correct statements from the…

A: Required : Correct statements .

Q: Select all of the statements about the main sequence stage in the life of a star that are TRUE:…

A: The statements about the main sequence stage in the life of a star that are TRUE: All stars spend…

Q: Relate hydrostatic equilibrium to the star's mass, composition, and evolution off the main sequence.

A: Hydrostatic equilibrium means that the inward force of gravity,a product of the star's mass, is…

Q: As a cluster of stars begins to age, which type of star in the cluster will move off the main…

A:

Q: Zebulon is a binary star system composed of a 10 M sun main sequence star and a 1 M sun red giant.…

A: Zebulon is a binary star system composed of a 10 M sun main sequence star and a 1 M sun red giant.

Q: mass

A: The evolution is affected by mass exchange in the binary. The higher mass  Star use to be the lower…

Q: Consider three main sequence stars: Star A is 14,500 K, Star B is 2,900 K, and Star C is 5,500 K.…

A:

Q: What is the life expectancy (in years) of a 10 M⊙ main-sequence star? What is the life expectancy…

A: Required : The life expectancy of stars.

Q: Betelgeuse is a nearby supergiant that will eventually explode into a supernova. Let's see how…

A:

Q: Betelgeuse is a red giant at a distance of 428 light years. In the future it will become a supernova…

A: The magnitude of a star is the relative brightness of the star. It is a scale in which the brighter…

Q: Betelgeuse is a nearby supergiant that will eventually explode into a supernova. At peak brightness,…

A:

Q: The Local Bubble is:

A: Option —A

Q: Consider two stars on the main sequence, A and B. Star A has a mass of 4 M⊙. Star B has a mass of…

A: mass of star A = 4 M⊙mass of star B = 0.8 M ⊙

Q: A Type Ia Supernova is an example of a:

A: A type Ia-supernova is an example of a standard candle. supernova is the result of a blast into the…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.