If a globular cluster contains 2 million stars and is 30 pc in diameter, what is the average distance between the stars?

Q: if the stars at the turnoff point in a star cluster have masses of about 9 M⊙, how old is the…

A: Mass of the star at the turn off point is  9 times of mass of the sun.

Q: You observe a spectral line from an emission nebula at a wavelength of 723 x 10-9 m.  If you are…

A:

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: At the end of its life, a star with a mass 7.8 times the Sun's mass is expected to collapse,…

A: Given,  Mass of star m = 7.8 x 1.99 x 1030 Kg Mass of neutron mn = 1.67 x 10-27 Kg

Q: At the average density of a star-forming molecular cloud, about 900 atoms per cm3, determine how…

A: Given:- M=2 times 1030 kg density=900 atoms/cm3= 1.51 times 10-18 kg/m3 Find radius of the sphere…

Q: Calculate the lifetime of a 15 MSun star. Answer: ___ years

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Q: If the two stars orbit in a such a way that the big star is 4 AU from the center of the mass and the…

A: Given:distance of larger star from COM, ra = 4 AUdistance of smaller star from COM, rb = 12 AUtotal…

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: Two stars have the difference between their apparent magnitudes +5, so their apparent luminosity…

A: The difference between the apparent magnitude is given as m1-m2=+5

Q: Assume that you observe both of these stars in a galaxy 10 million light-years away. How bright is…

A: 1) Distance of both stats from observer, d = 10 million light years d = 10 x 106 ly d = 107 ly 1…

Q: The mass of a star is 1.99·1031 kg and its angular velocity is 1.60E-7 rad/s. Find its new angular…

A: Given data: The mass of the star is m=1.99x1031 kg. The initial angular velocity of the star is…

Q: The star Firefly is located 3.0 pc away. If it had an absolute magnitude of 13.0, which value below…

A: Write the given data. d=3AbsM=13

Q: At the average density of of a star-forming molecular cloud, about 1180 atoms per cm3, determine how…

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Q: How long (in years) will a 0.06Msun main sequence star live? (The solar lifetime is 11 billion…

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Q: you assume that a globular cluster 4 arc minutes in diameter is actually 27 pc in diameter, how far…

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Q: What changes occur in the temperature and size of a Sun-sized star as it goes through its life…

A: As the star goes through its final stage of life cycle following thing happens  We know that it…

Q: mass

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

Q: A certain giant molecular cloud has a mass of 9.50 x 1035 kg, and 2.00 percent of its mass is…

A:

Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.1 g/cm3

A: It is given that,

Q: Given two stars in a binary star a total distance of 16 AU apart and an orbital period of 4 years…

A: Two Masses in the universe attract each other by a gravitational force. This force is directly…

Q: A star is known to be moving at 8.93km/s toward the earth. If you observe the spectral line to be at…

A: The velocity can be expressed as, v=λobs-λactλactc

Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0x10-12 watt/m?.…

A: Given: The luminosity is 7x1026 W. The apparent brightness is 4x10-12 W/m2.

Q: Calculate the mass-to-light ratio for a globular cluster with a luminosity of 106 LSun and 105…

A: Assume the mass of the Sun is denoted by Msun. Assume the luminosity of the Sun is denoted by Lsun.…

Q: The lowest mass for a true star is 1/12 the mass of the sun. What is the luminosity of this star (in…

A: Mass of the star, M star=1/12 times the mass of sun We are restricted to take the exponent of 4 for…

Q: The radius of the nebula is about 0.401 light-years. The gas is expanding away from the star at a…

A: Given that, r=0.401 light year1 light year=9.46×1015 mr=0.401×9.46×1015=3.79×1015 mThe particle at…

Q: Put in order the path a star takes when it starts out as a "less massive" protostar. Less massive…

A: The life cycle of a star is determined by its mass. The heavier is the mass of star, the shorter…

Q: If a contracting protostar is two times the radius of the Sun and has a temperature of only 1890 K,…

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Q: If you assume that a globular cluster 6 arc minutes in diameter is actually 27 pc in diameter, how…

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Q: If an open cluster contains 650 stars and is 27 pc in diameter, what is the average distance between…

A: Given,  number of stars in cluster = 650 Diameter = 27 pc So volume of cluster = 43πD23 volume…

Q: The youngest stars are   a. extreme population I.   b. intermediate population I.   c. extreme…

A: Given : To identify the youngest stars

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: RR Lyrae stars have essentially the same luminosity curve, with periods of up to 1 day.     False…

A: RR Lyrae stars have essentially same luminousity curve, with periods very less than 1 day.

Q: Which of these colors of light passes most easily through interstellar clouds? a Green light…

A: among green, red, blue and violet light,red light have longer wavelength.

Q: .Suppose you are looking at H-R diagrams of two similar star clusters. The most luminous main…

A: Using HR chart , We can say that  luminous directly proportional to diameter.