Find the approximate mass of the dark and luminous matter in the Milky Way galaxy. Assume the luminous matter is due to approximately 1011 stars of average mass 1.5 times that of our Sun, and take the dark matter to be 10 times as massive as the luminous matter.

Q: Quasars are thought to be the nuclei of active galaxies in the early stages of their formation. A…

A: Given:- A quasar radiates energy at the rate(P) =1x1041 W. One solar mass unit (1 smu= 2.0 x 1030…

Q: What is the average density of a neutron star that has the same mass as the sun if the radius of the…

A: Given Data: Radius of neutron star, R=41.591 km=41.591×103 m Mass of neutron star =Mass of sun,…

Q: A brown dwarf star has 5 times the mass of the Sun packed into a sphere of diameter of 20 km.…

A:

Q: The Sun, which is 2.2 * 10^20 m from the centerof the Milky Way galaxy, revolves around that center…

A: Thus,

Q: If the radius of the neutron star is 85.074 km, what is the average density of a neutron star that…

A: mass of the sun, Msun=1.989×1030 kg Radius of the sun, R=85.074 km Volume, V=43πR3

Q: How massive would a black hole have to be to have an event horizon the same size as the Earth?…

A: .

Q: The New Horizons probe is currently traveling at 14.1 km/s. How long would it take to reach Proxima…

A: speed of probe (v) = 14.1 kms= 14100 msdistance (d) = 4 light years

Q: What is the densest substance in the universe?

A: Osmium is the densest thing in the universe.

Q: The Big Bang that began the universe is estimated to have released 1068 of energy. How many stars…

A: energy created by star, E =0.5 x 1068 J mass of a star, m = 4 x 1030 kg

Q: Find the approximate mass of the luminous matter in the Milky Way galaxy, given it has approximately…

A: Given- Mass M=n×1.5Ms n=number of stars in the milky  Way galaxy Ms=Mass of the sun

Q: sketch a graph that shows the proper relationship.

A:

Q: A star is observed to undergo circular orbit around the black hole located at the centre of the…

A: We have a star which is undergoing a circular orbit of radius R=1000 AU=1.469*1014m with a time…

Q: A supernova explosion of a 2.00 x 1031 kg  star produces 1.00 x 1044 J of energy. What is the ratio…

A: The expression for find change in mass is ∆m=Ec2 Substitute values in the above equation…

Q: Among the globular clusters orbiting a distant galaxy, one is moving at 534 km/s and is located 14…

A: Given data: Speed of the globular clusters around the galaxy is, v= 534 km/s= 534000 m/s Distance of…

Q: The Andromeda galaxy is about 2.5 million light-years or 2.4 x 1022 m from our Milky Way galaxy, and…

A:

Q: If the Sun's mass is about average, how many stars are there in the Milky Way galaxy? The mass of…

A: Given: The mass of the Sun is of the order of ms=1030 kg, The mass of the Milky Way galaxy is of…

Q: The nearest neutron star (a collapsed star made primarily of neutrons) is about 3.00 × 1018 m away…

A: The expression to determine the volume of the galaxy is, Therefore,

Q: How many galaxies are there in the universe?

A: A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and…

Q: The radius at which nothing can escape the pull of a black hole is called the ________.

A: The radius at which nothing can escape the pull of a black hole is called the Schwarzschild radius.

Q: The Schwarzschild radius of a certain black hole is 30n kilometers. The mass of this black hole, in…

A:

Q: If the Sun's mass is about average, how many stars are there in the Milky Way galaxy? The mass of…

A: Given, Mass of galaxy = 1042 kg Mass of sun = 1030 Kg

Q: Recent findings in astrophysics suggest that the observable universe can be modeled as a sphere of…

A: It is given that,

Q: Assume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus…

A: Given information: The number of nuclei in the universe (n) = 1080  The mass fraction of helium…

Q: Which of the following might you expect to be an additional consequence of the fact that galaxies…

A: Given Which of the following might you expect to be an additional consequence of the fact that…

Q: What is the orbital velocity of our solar system about the center of the MilkyWay? Assume that the…

A:

Q: what is James B. Pollack contributions to physics    and what is Steven chu contributions to…

A: James B. Pollack was a very well-known astrophysicist born on 9th July 1938 and was associated…

Q: Compute the mass of 1 m3 of nuclear matter and the mass of Earth (6x1024 kg).

A: Required :  Mass of 1 m3 of nuclear matter and mass of the Earth.

Q: What would be the diameter (of the event horizon) of a black hole with the same mass as Jupiter?

A: Blackhole is a hypothetical concept that contains everything in the universe within a very small…

Q: The distance from the Sun to the nearest star is about 4 x 1016 m. The Milky Way galaxy (shown) is…

A: The expression for the required number of stars is,

Q: The famous debate where one person argued that faint objects were part of our system and the other…

A: The famous debate also called as the Shapley-Curtis debate.  This debate was held on 26th April…

Q: In Exercise 12.4 of your book, University Physics 15th edition (see End of the Chapter 12 section),…

A: Given: A neutron star has the same mass as the sun = 1.989 × 1030 kg Radius r = 45.716 km To…

Q: what is the answer for sub-item (b) if the radius of the neutron star is 42.518 km? (express your…

A: The relation of the volume of the spherical object is V=43πR3 The relation of the density is given…

Q: In Exercise 12.4 of your book, University Physics 15th edition (see End of the Chapter 12 section),…

A:

Q: The nearest neutron star (a collapsed star made primarily of neutrons) is about 3.00 × 1018 m away…

A: Let the Milky Way galaxy is a disk having the cross sectional area A and the radius of the Milky Way…

Q: The sun orbits the center of the Milky Way galaxy for a period of 2.5x10^8 years. (a) Assuming a…

A: Given  time period of rotation = 2.5 x 108 years  Radius of orbit =2.4 x 1020 m

Q: Scientists claim that empty space has an undetectable form of energy known as “dark energy.” This…

A: Dark energy is an theoretical concept which was put forward to explain one of biggest discoveries of…

Q: A spaceship is traveling through deep space towards a space station and needs to make a course…

A: Solution:                                  Ax =2.3×106Ay = 0Bx = 1.5×106 cos 70°By = 1.5×106 sin…

Q: Using the data in the table below and the appropriate conversion factors, find the mean distance to…

A: From the given table, the mean distance to the Moon is,

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.