What is the strongest piece of evidence for the existence of dark matter? O As stars die, they transition to either a supergiant star or a white dwarf O There is a 2.7 K background radiation that permeates the entire universe The rate of expansion of the universe is increasing The orbital speed of stars near the edge of galaxies is nearly the same as stars close to the center of the galaxy
Q: About how much of the universe is believed to be composed of dark energy? O 68-73% O 10-12% O 4-5% O…
A: We know very less about the universe . and said universe is expand . the maximum thing is unknown…
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: critical density
A:
Q: The figure below is based on an assumed Hubble constant of 70 km/s/Mpc. How would you change the…
A: Given Hubble constant velocity = 70 km/s/Mpc
Q: 3. The formula for Hubble's Law using the velocity v is valid only for velocities much smaller than…
A: Given data: Redshift z=4.89. The recessional velocity is given as, v=cz+12-1z+12+1 Here, c is the…
Q: Pretend that galaxies are spaced evenly, 8.0 Mpc apart, and the average mass of a galaxy is 1.0 ✕…
A: Average density of the matter in the universe ρavg=M43πd23=6Mπd2
Q: zicle is shown by the Feynmanı ow heads in the pion? *
A: Given: In the Feynman diagram, the correct diagram representation is given as,
Q: Current evidence suggests that the universe is a. flat, infinite, and neither expanding nor…
A: To determine: The correct option.
Q: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter ?
Q: What is the role of symmetry in fundamental physics? Provide examples of symmetry principles in…
A: Symmetry plays a fundamental role in physics as it helps to simplify complex problems and provides a…
Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)? km/s/Mpc…
A: The question above has been given from Hubble's law. This law is also known as the Hubble-Lemaitre…
Q: Galaxy will emit synchrotron radiation as a sun forms
A: The star forming region of a Spiral Galaxy will emit synchrotron radiation as a sun forms in the…
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: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter.
Q: 5.4 In a negatively curved universe containing only matter (2, < 1, K = -1), show that the present…
A: Given, the universe contains only matter and Ωo<1 So scale factor will be a=12ΩoΩo-1coshθ-1…
Q: The CMB contains roughly 400 million photons per m³. The energy of each photon depends on its…
A: The wavelength is 0.0011 m. The energy of a photon is 1.807×10-22 J.
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: Which of the following statements about the different types (shapes) of galaxies are correct?…
A: The galaxies in the universe are generally classified into 3 major kinds based on their shapes. The…
Q: What was the most startling discovery about the universe that occurred in 1998? O its expansion is…
A:
Q: Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe.…
A: Hubble's Law gives us the conclusion that the universe is always expanding. It takes very short…
Q: About what percentage of the universe is believed to be composed of normal matter? O 5% O > 22% O…
A: 68% of the matter is dark energy. 27% of the matter is dark matter. Rest less or equal to 5% is…
Q: What effect does increasing the interaction strength of a massive particle species have on its…
A: The thermal relic abundance of a particle species is determined by the balance between its…
Q: True or False: Dwarf elliptical galaxies and giant ellipticals probably formed in entirely different…
A: To find true or false: Dwarf elliptical galaxies and giant ellipticals probably formed in entirely…
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: The figure below shows the spectra of two galaxies A and B.
A: 1. According to the figure Galaxy A has a high relative flux density which shows it has a dense…
Q: Please answer within 90 minutes.
A: Part (c)Two Pieces of Observational Evidence for Dark Matter:1. Rotation Curves of…
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: The CaII H and K lines have rest wavelengths of 396.85 nm and 393.36 nm, respectively. In the…
A:
Q: If the mass density of the universe is above the critical density as it appears to be with the mass…
A: Given, The mass density of the universe is above the critical density.
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…
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- The first picture is some background information need help answering the first question about the escape velocity from the andromeda GalaxySuppose an alien race on a distant planet tries to send a message to us, with a laser (light). However, we were unaware that there is a stellar-mass black hole almost directly between us and them. How would this complicate our attempts to locate their position in the Galaxy? O Gravitational lensing would make the signal appear to be coming from a different location O The information carried by the laser (light) would be altered O It would not matter The black hole absorbs all of the lightOver the lifetime of the Universe, the dynamics of its expansion are dominated by the density of different constituents at different times. Ignoring expansion, what is the proper order for which constituent dominates from early to later times? Select one: a. First matter, then dark energy, then radiation b. First radiation, then matter, then dark energy c. First dark energy, then radiation, then matter d. First radiation, then dark energy, then matter
- An observational survey of distant galaxies is undertaken that involves measuring their distances using cepheid variables and red-shifts using spectroscopy. Explain how cepheid variables can be used to measure the distances to galaxies. A spectral line is observed whose wavelength in the laboratory is de length of this spectral line observed in each galaxy, Xo, is listed in the table, along with the distance, d, to the galaxy. Determine the red-shift and the recession velocity of each galaxy and tabulate your results by making a copy of the table and filling in the blank spaces. Sketch a Hubble diagram using your results and determine the value of the Hubble constant Ho in units of km s-1 Mpc. 650 nm. The wave- Galaxy 1 652.69 Galaxy 2 Galaxy 3 Galaxy 4 Galaxy 5 653.01 do (nm) d (Mpc) 658.54 662.18 681.63 17 19 54 77 200 v (km s-1)Compute the critical density of the universe using the universal gravitational constant G= 6.67*10-11Nm2/kg2 and the Hubble constant of 73km/s/Mpc. B) What is the geometrical implication be if the universe has the critical density? Note: 1pc = 3.1*1016m