Early astronomers thought that galaxies were single stars. Why was this mistake easy to make? A. Galaxies are so far away that they look like a single star. B. Galaxies are made of stars that you can only see one at a time. C. Light from galaxies collects into a single beam. D. Earth is small and galaxies are much larger.
Q: Where is the bulk of the mass concentrated in the region depicted here? 133 Anten Milky Way.. SMC…
A: The above pic is the pic of the local group, which consists of The Milky Way The Andromeda…
Q: The sun is about 8 kpc from the center of the galaxy. A kpc or kiloparsec is equal to a. 10…
A: A kpc or kiloparsec is equal to the 1000 parcec Here, In the option this value is not given
Q: Current evidence suggests that the universe is a. flat, infinite, and neither expanding nor…
A: To determine: The correct option.
Q: The Messier Catalog is a. a listing of all the stars within the Local Bubble b. a list of all the…
A: The Messier catalog is a list of 110 commonly found objects in the night sky that can be easily…
Q: The approximate diameter of the disk of the Milky Way is a. 8.0 A.U. b. 8.0 light-years. c.…
A: To determine diameter of the disk of the milky way
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A: The force that is carried by the field of virtual astronomical particles in the quantum field is…
Q: If the universe is closed and finite, then a. the universe has a center and an edge. b. the…
A: If the universe is closed and finite, then the final fate of the universe will be very cold and of…
Q: Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,…
A: we see galaxies as they looked before years light takes to reach us from them. let say a galaxy is…
Q: In which portion of the spectrum is the core of the galaxy invisible? a. infrared b. visible…
A: In gamma ray the core of the galaxy invisible
Q: If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What…
A: Note: As per the policy, only the first question will be solved. If you want the solution for other…
Q: The big bang happened a. in the Hyades cluster. b. in the Virgo cluster. c. in the…
A: The big bang happened in all of these locations.
Q: The first evidence for the dark energy was that: a. the cosmic microwave background spectrum was a…
A: The first evidence for dark energy came in 1998 two teams of astronomers measured light coming from…
Q: Explain how the Hubble law allows you to estimate the distances to galaxies.
A: According to Hubble's law, the velocity of galaxy with respect to earth is directly proportional to…
Q: The large black hole at the center of our galaxy is estimated to be a. 3.7 solar masses. b.…
A: Given : Asked to choose the correct option for the mass of the large black hole present at the…
Q: Which of the following is an accurate statement about quasars?
A: ANS: They are abnormally massive, luminous stars at the cores of ancient galaxies.
Q: E.E. Barnard contributed to the understanding of our galaxy by________. all of these are…
A: E.E. Barnard contributed to the understanding of our galaxy by________.
Q: Suppose you wanted to measure the distance to an elliptical galaxy around 5 Mpc away using variable…
A: Given: To measure the distance in an elliptical galaxy having 5 Mpc used as the variable stars. To…
Q: Suppose a spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms. What…
A: Given that: A spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms.…
Q: Radio maps of the spiral arms of our galaxy a. reveal that our galaxy is a grand design spiral.…
A: Radio maps of the spiral arms of our galaxy map the location of dense neutral hydrogen clouds.
Q: The search for black holes involves searching for a. single stars that emit large numbers of X…
A: Blackholes are the objects which have extreme gravitational pull through which even light cannot…
Q: What causes the galactic winds coming from a supermassive black hole? Oa Material falling inward…
A: Solution: Galactic winds are high-speed wind nearly 300 - 500 km/s from the supermassive black hole…
Q: A star at a distance of 50000 light years from the center of a galaxy has an orbital speed of 100…
A:
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- Which of the following might you expect to be an additional consequence of the fact that galaxies contain more mass than expected?A. The gravitational force between galaxies is greater than expected.B. Galaxies appear less bright than expected.C. Galaxies are farther away than expected.D. There are more galaxies than expected.2. Suppose an absorption line in a spectrum of light from a very distant galaxy is 5015 Angstroms. But the same line in a laboratory on Earth is 4865 Angstroms. What is the distance to the galaxy in parsecs? What is the distance in light years? Show the math. Math: Distance in parsecs = Distance in light years =The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical orbits. c. were population I stars. d. all had orbits in the same plane. e. formed the galactic clusters we see today.
- The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy. a. I b. IV c. I & IV d. II & IV e. I & III2. The quasar that appears the brightest in our sky, 3C 273, is located at a distance of 2.4 billion lightyears.The Sun would have to be viewed from a distance of 1300 light-years to have the same apparentmagnitude as 3C 273. Using the inverse square law for light, estimate the luminosity of 3C 273 in solarunits.If the mass density of the universe is above the critical density as it appears to be with the mass detected so far, then the universe is a. flat b. negatively curved C. in steady state d. positively curved
- Which is a scientific hypothesis? Select one: a.atoms are the smallest matter particles b.the universe is one of many universes c.Einstein is the top physicist of our century d.all of these answers.8. Milky Way The Sun is a star in the Milky Way galaxy. When viewed from the side, the galaxy looks like a disk that is approximately 100,000 light-years in diameter (a light-year is the distance light travels in one year) and about 1000 light-years thick (Figure P25.8). What is the diameter and thickness of the Milky Way in meters? In kilometers? In miles? Figure P25.8 Galactic Longitude 75.000 ittarius Sagitt Arm Onan Perseus Arm Arm 15,000 30.000 180° Scutum-Ce 270° Sun and solar system's location in the Milky Way4
- 21. Which of the following represents the notion that our observable Universe may be a part of a much larger whole? a. Big Bang Nucleosynthesis. b. Solar System. c. Galaxy. d. Multiverse.In an open universe, the overall geometry of the Universe would be a. flat b. spherical c. hyperbolicThe group speed of EM wave can be larger than light speed. Select one: O True False