Evidence that much of the mass of the universe consist of dark energy has come from __________ a) measuring the density of matter in the solar system b) determining the distance to the Coma cluster c) determining the distance to quasars d) observing extremely distant supernovae

Q: The large look-back times of the farthest galaxies and quasars is about ______________ of the way…

A: The large look-back times of the farthest galaxies and quasars is about ______________ of the way…

Q: Most of the helium of the universe was produced __________ a) In stars b) In quasars c) At the…

A: To find: Most of the helium of the universe was produced

Q: Which of the following is FALSE (NOT TRUE)? A) The Doppler effect can be used to measure the radial…

A: False statement  (B) we can measure the distance to galaxies using parallax.

Q: 21) If the Hubble's constant for a universe is 25 km/s/Mly. Calculate the distance to a galaxy that…

A: Edwin Hubble discovered through observation that the Universe is expanding. Galaxies are moving away…

Q: What would be the Hubble constant if the universe were 18 billion years old?

A: The age of universe is given as, t = 18 billion years (or) t = 18×109 years TO DETERMINE: The…

Q: Gravity played an important role in the formation of solar systems, stars, and galaxies.  What role…

A:

Q: 21) If the Hubble's constant for a universe is 15 km/s/Mly. Calculate the distance to a galaxy that…

A: As per the observations made by Edwin Hubble, it was seen that the galaxies were moving away from…

Q: As the universe expands, which type of cosmic energy has a density that falls off most quickly? 1.…

A:

Q: why do you have to know the distance to a galaxy to find its mass?

A: The orbital motion of stars explains the masses of galaxies. The stars in a heavier galaxy exhibit…

Q: Explain why Olbers’s paradox is not a paradox.

A: In the early history of astronomy, it was believed that the universe is static, infinite, uniform,…

Q: Describe some of the characteristics of the universe that are explained by the standard Big Bang…

A: Given, Big Bang theory of universe

Q: what are some fundamental properties of late type galaxies that our theories of galaxy formation…

A: All those galaxies which are included under Spiral and Irregular Galaxies are termed as Late Type…

Q: What observation in astronomy, made AFTER the discovery of quasars, was a big help to astronomers in…

A: A quasar is an enormous object same like star. It also shines very brightly. It sends out radio…

Q: All Radio Galaxies have the following number of plasma jets and lobes a) 2  b) 5  c) 1  d) 4…

A: Radio galaxies have two plasma jets and lobes.

Q: b) The cosmic microwave background dates to a time when the universe was -380,000 years old, or to a…

A: Given: 380000 years ago Tr=3000 Kz=1100

Q: What is the strongest piece of evidence for the existence of dark matter? O As stars die, they…

A: The strongest piece of evidence for the existence of the dark matter is "The orbital speed of the…

Q: Make a web search and explain in your own words dark energy and dark matter  ( in astronomy )

A: Our universe is dominated by mysterious and invisible form of matter and energy. Universe consist…

Q: The cluster of galaxies which is farthest from the Earth is __________ a) Abel 2218 b) Milky way…

A: A

Q: If an O-type star and our galaxy were at the same distance, which would have a greater magnitude? a)…

A: Given: The O-type star and our galaxy at same distance. The apparent magnitude decreases with the…

Q: What is the estimated age of the Universe (in years) if the Hubble constant is 70 km/s/Mpc?

A:

Q: What causes galaxies, stars, and solar systems to form? * A) Visible matter and/or dark matter…

A: Answer B) Visible matter and/or dark matter create a strong gravitational force to form these groups…

Q: Hubble law describes how the speed of recession of distant galaxies varies with the distance from…

A: Introduction: Hubble law: It is used for describing the age of the universe since the big bang. It…

Q: A galaxy is found to be receding at a velocity of 3.0 x 104 km-s-1. Calculate the distance to the…

A: Edwin Hubble discovered through observation that the Universe is expanding. Galaxies are moving away…

Q: Evidence that much of the mass of the universe consist of dark energy has come from __________ a)…

A: To find: Evidence that much of the mass of the universe consist of dark energy has come from

Q: 7.) Explain what dark energy implies for the composition and age of the universe.

A: Dark energy is a hypothetical form of energy that is believed to exist in the universe and is…

Q: What was the lowest temperature for photons to be able to produce 0 particles in the early universe?…

A: Given: kT=mc2

Q: wolume of a s

A: The average density of spherical galaxy is given as, ρ=M43πr23

Q: 3. What are heat engines? How do they work? 2. How is the second law expressed? Give examples. 4…

A: Sadi Carnot, the father of thermodynamics, was one of these scientists, publishing Reflections on…

Q: In the standard model, about when after the Big Bang did the universe become transparent to…

A: Ans is :- C

Q: Under what circumstances would the slope of the best-fitted line in Figure decrease:

A: Required The correct choices.

Q: There exists an element visible in the spectrum of galaxies that shows the following spectra when…

A: Introduction: The Doppler effect refers to the apparent shift in the wavelength of a wave when there…

Q: An astronomer observed the motions of some galaxies. Based on his observations, he made the…

A:

Q: alaxy? Explain.

A: Given: To explain the how astronomers find the distance of the galaxy is given as,

Q: QUESTION 6 A galaxy is discovered at a distance of 11 billion light-years from our solar system. We…

A: Here, We are given that a galaxy is discovered at a distance of 11 billion light - years from our…

Q: Use excel calculator to fill in the missing calculations. 1pc = 3.26 ly Galaxy Andromeda Large Mag.…

A: We need to complete the table in Excel. 1pc = 3.26 lyAlso, 1 ly=9.461e+12 km

Q: 3) A supernova of luminosity 1 billion solar luminosities is used as a standard candle to measure…

A: The luminosity of supernova is given as, LSn=1 billion solar luminosities=1×109LS, The distance…

Q: After the Big Bang the Universe expanded and cooled. What was the temperature of the Universe when…

A: All of the universe's matter and energy were once concentrated in a singularity with infinite…

Q: Supermassive black holes at the center of galaxy are believed to be produced Answer. O by the death…

A: Supermassive black hole have masses of about million or billion times more mass than typical stellar…

Q: 4) Calculate the redshift of a galaxy with a recessional velocity of 0.68c. (

A: When a celestial object is moving away from the observer the light observed from the object will…

Q: Pretend that galaxies are spaced evenly, 7.0 Mpc apart, and the average mass of a galaxy is 1.0 ✕…

A: The average density of matter in the universe is given by

Q: What is the approximate temperature of the universe that we currently observe?   a. 0 K   b. 2.7 K…

A: The temperature of the universe recently measured by the scientists is 2.73 Kelvin.

Q: Which of the following is true about the astronomical object known as MB7! O a M87 is the result of…

A: Neutron stars are very dense dead stars. In the second collision, a black hole of 10 solar masses…