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: The cosmic microwave background consists of: huge clouds of dark matter interspersed with equally…

A: Cosmic microwave background also known relic radiation. Cosmic microwave background is kind of…

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: 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 was the temperature of the universe when the recombination took place that produced the cosmic…

A: Around 400,000 years after the big bang, the space was completely filled with a hot soup of…

Q: The objects that are detected at the points where the gas of a radio jet hits the extragalactic…

A: The quasar are small and the powerful source if energy that is active core of very distant galaxies.

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: Calculate the critical density of our universe.

A: Our universe is expanding and critical density is defined as the average density of matter that is…

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: Explain why galaxies can have different shapes.  please explain briefly and clearly

A: Reason why galaxies have different shapes : When we gaze up into the night sky, we can see stars…

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: Estimate the temperature of the universe when it was approximately 1 minutes old

A: Our universe is thought to be formed from a singularity of infinite density and temperature. It…

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: 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: Which of the following is true of the cosmic microwave background radiation as we observe it today?…

A: Given:

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: 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: 6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.

A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…

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: What evidence can you cite that the expansion of the universe is accelerating?

A: It is observed that galaxies are moving away from Earth at speeds proportional to their distance.…

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: What is dark matter? (200 words)

A: Answer:Dark matter is a form of matter accounting 85% of the matter in the universe and about a…

Q: We believe that the big bang occurred 13.8 billion years ago. Give 3 reasons why scientists believe…

A: There are several lines of evidence that support the idea that the universe is 13.8 billion years…