Protostar
Q: A protostar evolves from a temperature T = 3500 K and a luminosity L = 5000 times that of the Sun to…
A: Given data: The initial temperature of the protostar is T1=3500 K. The initial luminosity of the…
Q: Suppose a planetary nebula is 4.6 pc in diameter, and Doppler shifts in its spectrum show that the…
A: The diameter of planetary nebula is given as, D=4.6 pc. Then, the radius of planetary nebula is…
Q: of a star occur
A: Possible stages of a star that occurs are as follows:
Q: What would most bright nebulae look like if there were no interstellar dust?
A: A nebula is defined as a large region of interstellar clouds made of dust, hydrogen, helium, and…
Q: The Hydra super cluster is at a distance of about 800 MParsec. What is the recessional velocity?
A:
Q: How does a contracting protostar convert gravitational energy into thermal energy?
A: Stars are formed from clouds of gas present in the interstellar medium. Since the temperature is low…
Q: Explain why the sky is blue and how that relates to reflection nebulae.
A: Dispersion. Despersion is a phenomena in which when light passes beteen 2 particle it disperses.
Q: Describe each of the following nebulae and how they can be observed: HIl region Cold hydrogen gas…
A: (1) HII region (2) Cold hydrogen gas (3) Dust clouds
Q: What factors resist the contraction of a cloud of interstellar matter?
A: Interstellar matter is defined as the space between the stars' systems in the galaxy. It is made…
Q: What critical event must occur in order for a protostar to become a star?
A: A very young star that is yet gathering mass from the parent molecular cloud is called a protostar.…
Q: If a globular cluster contains 1 million stars and is 25 pc in diameter, what is the average…
A: The diameter of the globular cluster is d= 25 pc. Number of stars contain by the open clusters n= 1…
Q: If a contracting protostar is three times the radius of the Sun and has a temperature of only 3000 K…
A:
Q: If we look at a cluster featruing a lot of ble stars, we know the cluster is young. How do we know…
A: Generally stars that can be seen by the naked eye, tend to be greater in diameter and shine more…
Q: What elements made up most of the nebulaein the very young Universe?
A: We have to find out what elements forms the early nebulae
Q: How is the turnoff point on the H-R diagram of a cluster related to the cluster’s age?
A: Given:- The turnoff point on the H-R diagram of a cluster related to the cluster’s age Explain:- How…
Q: ar formation, themselves f
A: Newton formulated equations which showed the gravity behavior. He determined the force of gravity…
Q: If a globular cluster contains 2 million stars and is 28 pc in diameter, what is the average…
A: This problem can be solved by first calculating the average volume reserved for one star and then…
Q: Please give answer. Describe, with the aid of suitable diagrams, the basic structure and components…
A: ATLAS detector at the LHC. We have to give information about structure and components of the ATLAS…
Q: A turnoff point corresponding to the oldest star cluster would occur at what spectral…
A: Turnoff point in HR diagram is the point where the star leaves the main sequence branch
Q: Main sequence star A is 5 times as massive as main sequence star B. How do the main sequence…
A: Main sequence stars are those which fuse hydrogen atoms in their core to form helium. They have a…
Q: Gas clouds that form stars are pulled together by which of the following?
A: The correct option is A : Gravitational Fields
Q: What is hydrostatic equilibrium in stars.
A: The interstellar medium is mostly made of hydrogen. When the mass of the interstellar medium becomes…
Q: If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between…
A: Given Number of stars in an open cluster (n) = 450 Diameter of the cluster Dclu = 21 pc…
Q: If a globular cluster contains 2 million stars and is 30 pc in diameter, what is the average…
A: A Globular cluster is a cluster of old stars, only a few years younger than the Universe itself…
Q: When a region of a molecular cloud collapses, a protostar is formed. How do the temperature and…
A: Protostars form primarily in the spiral arms of galaxies in the modern era, which spans at least the…
Q: If a contracting protostar is 0.5 times as luminous as the Sun and has a temperature of only 1,500…
A:
Q: Star A and Star B are both on the main sequence. Star A is 63 times more luminous than Star B. What…
A:
Q: The place on the H–R diagram where contracting protostars first become visible is a. the…
A: The place on the H–R diagram where contracting protostars first become visible is the birth line.
Q: suppose a planetary nebula is 2.8 pc in diameter, and doppler shifts in its spectrum show that the…
A: Given information: The diameter of the nebula (D) = 2.8 pc = 2.8 (3.1×1013 km) = 8.68 ×1013 km The…
Q: A giant molecular cloud is 27 pc in diameter and has a density of 380 hydrogen molecules/cm3. What…
A: Given the diameter of the giant molecular cloud is d = 27 pc (parsec) Density of the cloud is 380…
Q: On a Hertzsprung-Russell diagram, where on the main sequence would we find stars that have the…
A: We need to investigate where we find the largest main sequence stars in the H-R diagram.
Q: Suppose a planetary nebula is 3.5 pc in diameter, and Doppler shifts in its spectrum show that the…
A:
Q: The average star spends what percentage of its life in the protostar stage? a. 0.1% b. 5% c.…
A: The average star spends 90% of its life in the protostar stage An average star stellar evolution…
Q: planetary nebula expands at 38 km/s. How far will it expand (in km) in 3 million years?
A: Here given nebula is expanding with given speed. As in 1 sec nebula expands 38 Km, In 3 million…
Q: A planetary nebula expands at 32 km/s. How far will it expand (in km) in 0.6 million years?
A: Expansion rate of the Nebula: It can be defined as the distance up to which the nebula expands in a…
Q: What critical event must occur in order for a protostar to be- come a star?
A: Stars are formed from interstellar clouds. When the mass becomes high enough the molecular cloud…
Q: A turnoff point corresponding to the youngest star cluster would occur at what spectral…
A: The turnoff point of a star is the point where it leaves the main sequence of the HR diagram after…
Q: Astrology: An accretion disk of a protostar takes mass from the ___________ and gives mass to…
A: A proto star is not a star but a star in formation. An accretion disk is is rotating disk made up of…
Q: How massive have to be a main-sequence star in order to survive for at least 15 billion years?
A: The objective of this question is to determine the mass of a main-sequence star that would allow it…
Q: In which component of the interstellar medium do new stars form? O molecular clouds O HII Intercloud…
A: Interstellar medium is the medium between matter and radiation. The matter are gases (gas cloud),…
Q: What processes determine the distribution of physical conditions within star-forming regions, and…
A: The distribution of physical condition within star forming region is determined basically by the…
Q: If a protostellar disk is 240 AU in radius and the disk plus the forming star together contain 9…
A: Given Radius r = 240 AU Mass m = 9 Solar mass Known Values 1 AU = 1.496 x 1011 m 1 solar mass =…
Q: This star has a mass of 3.3 MSun. What is the main sequence lifetime of this star? You may assume…
A: The main sequence lifetime is given as:t α1M2.5it is given star has mass of 3.3 MSunSo,…
Q: A star orbiting Sagittarius A* is orbiting 970 AU from a 4 million MSun object. How fast (in km/s)…
A: The centripetal force is the force that keeps the planet or the star revolving around a central…
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: Suppose a planetary nebula is 4.3 pc in diameter, and Doppler shifts in its spectrum show that the…
A: The expression for find age of planetary nebula is t=Rv=d2v
Protostar
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