Does the expansion of the universe make the Sun bigger? What about the Milky Way? Why...
Does the expansion of the universe make the Sun bigger? What about the Milky Way? Why or why not?
Homework Answers
expansion of universe will not effect sun,universe is expanding
but the distance between earth and sun remain same and size of sun
also will be same. expansion of universe does not affect relative
position of astronomical bodies inside galaxies.
Gravitationally bound objects do not expand so milkyway is also not
expand with universe.we can observe expansion by disappearance of
distant galaxies.
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Does the expansion of the universe make the Sun bigger? What
about the Milky Way? Why...
The sun orbits the center of the Milky Way galaxy (see figure) in a period of...
The sun orbits the center of the Milky Way galaxy (see figure)
in a period of 2.5 108 years.
(a) Assuming a circular orbit of radius 2.12 1020 m, compute the
mass of the Milky Way.
(b) Estimate the number of stars in the Milky Way, assuming the
average star mass equals the mass of the sun—2.0 1030 kg. units
What have scientists discovered about the expansion of the Universe? The expansion is currently slowing down...
What have scientists discovered about the expansion of the Universe? The expansion is currently slowing down and will eventually turn into a contraction. is currently speeding up but only close to our galaxy. Farther away the Universe contracts. proceeds with constant speed. is currently slowing down and will not turn into a contraction. is currently speeding up.
For each of the following distances, if a galaxy the size of the Milky Way (about...
For each of the following distances, if a galaxy the size of the Milky Way (about 30.1 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? 11.7 Mpc - a = --- arc minutes 1034 Mpc- a = ---arc mintues
For each of the following distances, if a galaxy the size of the Milky Way (about...
For each of the following distances, if a galaxy the size of the Milky Way (about 30 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? a. 11.7 Mpc α = _____ arc minutes b. 1079 Mpc α = _____ arc minutes
For each of the following distances, if a galaxy the size of the Milky Way (about...
For each of the following distances, if a galaxy the size of the Milky Way (about 29.9 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? a. 10.8 Mpc a-Γ arc minutes b. 1041 Mpc a-Γ arc minutes
For each of the following distances, if a galaxy the size of the Milky Way (about...
For each of the following distances, if a galaxy the size of the Milky Way (about 29.9 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? a. 11.6 Mpc α = arc minutes b. 1081 Mpc α = arc minutes
Estimate the number of protons in the universe. Assume that most of the matter is due...
Estimate the number of protons in the universe. Assume that most of the matter is due to the stars, which are made mostly of hydrogen. There are roughly 1012 galaxies in the universe, and their average size is that of the milky way which has about 1011 stars, where the average mass is the one solar mass (The mass of our sun is about 1.99 × 1030 kg, mass of hydrogen is about 1.67 × 10-26 kg)
Multiple Choice Question only, no long answers. The expansion of the universe takes place only between...
Multiple Choice Question only, no long answers.
The expansion of the universe takes place only between objects separated by vacuum; as a result, our bodies do not expand, but the Earth-Moon system does. between all objects, even between the atoms in our bodies, although the expansion of a person is too small to be measured reliably. O only over distances the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not. O...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 10 light years and an orbital speed of about 210 km/s . A) Determine the mass of the massive object at the center of the Milky Way galaxy. Give your answer in kilograms. B) Give your answer in solar masses (one solar mass is the mass of the sun). C)...
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0x10^11...
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0x10^11 solar masses. A star orbiting near the galaxy's periphery is 6.0X10^4 light years from its center. (For your calculations, assume that the galaxy's mass is concentrated near its center.) (a) What should the orbital period of that star be in yr ? (b) If its period is 6.0 x 10^7 years instead, what is the mass of the galaxy? Such calculations are used to...
The sun orbits the center of the Milky Way galaxy (see figure)
in a period of 2.5 108 years.
(a) Assuming a circular orbit of radius 2.12 1020 m, compute the
mass of the Milky Way.
(b) Estimate the number of stars in the Milky Way, assuming the
average star mass equals the mass of the sun—2.0 1030 kg. units
For each of the following distances, if a galaxy the size of the Milky Way (about 29.9 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? a. 10.8 Mpc a-Γ arc minutes b. 1041 Mpc a-Γ arc minutes
Multiple Choice Question only, no long answers.
The expansion of the universe takes place only between objects separated by vacuum; as a result, our bodies do not expand, but the Earth-Moon system does. between all objects, even between the atoms in our bodies, although the expansion of a person is too small to be measured reliably. O only over distances the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not. O...
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