It is possible to derive the age of the universe given the value of the Hubble constant and the distance to a galaxy, again with the assumption that the value of the Hubble constant has not changed since the Big Bang. Consider a galaxy at a distance of 235 million light-years receding from us at a velocity, v. If the Hubble constant is 20.5 km/s per million light-years, what is its velocity? (Enter the magnitude in km/

Q: Pretend that galaxies are spaced evenly, 4.0 Mpc apart, and the average mass of a galaxy is 1.0 x…

A:

Q: Suppose that the outer stars of a galaxy have an orbital velocity of 150 km/s. If the radius of the…

A: Given data: rgalaxy=4 kpcv=150 km/s Need to determine the orbital period of the outer stars.

Q: Calculate the number of miles in a light-year, using 1.86  105 mi/s as the speed of light. (Hint:…

A:

Q: Indicate whether the following statements are true or false. (Select T-True, F-False. If the first…

A:

Q: (b) Draw the shape of the Milky Way for a spaceship with a velocity of 20%, 50%, and 90% of the…

A:

Q: Imagine that an observed distant galaxy is measured to have a distance of 40 Mpc by a Type Ia…

A:

Q: = 2. Using a Hubble constant of Ho 70 km/s/Mpc, find the distance to the galaxy cluster that moves…

A: Distance to the galaxy cluster is 92.8571 Mpc or 3.029×108light years. Explanation:Hubble's law…

Q: What was the maximum age of the universe predicted by Hubble's first estimate of the Hubble…

A: Hubble’s time: It is defined as follows, Here H is the Hubble’s constant which has unit km/s/Mpc…

Q: Consider a universe in which the Hubble constant has been measured to have the value H0 = 50…

A: Hubble's law gives the idea that the universe is continuously expanding, and that galaxies are…

Q: If a standard passenger aircraft can fly at 0.27 km/s (604 mph), how long (in yr) would it take to…

A: The problem is based upon distance time relation. We know that distance is the length. For very…

Q: given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years)…

A: Given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years) =…

Q: Suppose the Hubble constant were not 22 but 12.1 km/s per million light-years. Then what would the…

A: Write the expression for the volume of the sphere. Write the expression for the mass. Here, ρ is…

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: random times over the last 1010 years. The rate of star formation is simply the number of stars…

A: Number of stars in our milky Way galaxy is  N=9×1010 Time taken in the formation of a plane

Q: If a galaxy has a redshift of 0.35 and the hydrogen line has a wavelength of 486.3 nm, what will be…

A: Redshift happens when the source of light moves away from the observer. The frequency observed will…

Q: solar masses. (Hint: Use the formula for circular velocity, V. = VS"; make sure you convert relevant…

A: Given Data: The orbital velocity of a globular cluster is, ve=417 km/s The distance from the centre…

Q: If a galaxy is 9.2 Mpc away from Earth and recedes at 475 km/s, what is H0 (in km/s/Mpc)?

A:

Q: Calculate the age of the universe for the following Hubble's constant, (b) 65 km/s/Mpc

A: As per Hubble's law, the universe is expanding. If we assume that the expansion's apparent velocity…

Q: Let's say that the number density of galaxies in the universe is, on average, 3 × 10–68 galaxies/m3.…

A: Given :number density of galaxies, n = 3 × 10–68 galaxies/m3            Observable distance by…

Q: If the active core of a galaxy contains a black hole of 10°M, (1 million solar masses), what will…

A: mass of black hole, M=106 MΘ=106*2*1030=2*1036 Kg radius of orbit,r=0.33 Au=0.33*1.5*1011=0.495*1011…

Q: Among the globular clusters orbiting a distant galaxy, one is moving at 534 km/s and is located 14…

A: Given data: Speed of the globular clusters around the galaxy is, v= 534 km/s= 534000 m/s Distance of…

Q: If the active core of a galaxy contains a black hole of 106 Me, what will the orbital period be for…

A:

Q: tudying for test: A new astronomical measurement suggests that the Hubble constant is 1112…

A: Given the new value of of the Hubble constant H0=1112km/s/MpcWe know1Mpc=3.086×1019kmHence…

Q: Suppose that stars were born at random times over the last 1010 years. The rate of star formation is…

A: Given that, The total number of stars in the Milky way is N=8×1011 And the stars were born at random…

Q: A galaxy's distance from us is measured to be 49 Mpc. Using the same value of the Hubble constant,…

A: Given:distance of the galaxy, d = 49 Mpcstandard value for hubble's constant is, H = 70…

Q: If a galaxy is 9.3 Mpc away from Earth and recedes at 508 km/s, what is H, (in km/s/Mpc)? |km/s/Mpc…

A: velocity, v=508 km/s distance, d=9.3 Mpc=9.3×3.086×1019 Km=28.7×1019 Km. Hubble constant,…

Q: According to the version of the Big Bang Theory without a Cosmological Constant (and without Dark…

A: Hubble's Law states that as the universe is expanding in all directions, the receding velocity of an…

Q: If the Hubble's constant was 100 km/s/Mpc instead of 70 km/s/Mpc what would be the estimated age of…

A: It was observed that the galaxies were moving away from us. Edwin Hubble calculated their recession…

Q: If a galaxy is 8.9 Mpc away from Earth and recedes at 510 km/s, what is H0 (in km/s/Mpc)?

A: The Hubble constant can be calculated by v=H0d Where v is velocity in km/s Ho is Hubble constant in…

Q: Consider three periods in the history of the Universe: one million years after the Big Bang (age = 1…

A: In early times, the Universe was expanding at a rapid pace. Then, the rate of expansion of the…

Q: Calculate the age of the universe for the following Hubble's constant, (a) 50 km/s/MDC

A: As per Hubble's law, the universe is expanding. The recessional velocity of galaxies is directly…

Q: Calculate the age of the universe for the following Hubble's constant, m (c) 80 km/s/Mpc Of

A:

Q: If you find a galaxy that is the same size and mass as our Milky Way Galaxy, what orbital velocity…

A: Mass of our galaxy (M1): 4.0 X 1011 M Semi-major axis of the orbit (a): 51 kpc

Q: Suppose you want to observe the molecular gas in a galaxy with redshift z using the rotational…

A: Suppose you want to observe the molecular gas in a galaxy with redshift z using the rotational…

Q: Based on comparison with the Moon, it can be calculated that Andromeda would have to have a diameter…

A:

Q: The Hubble constant is (approximately) 70 kilometers per second per megaparsec.  At approximately…

A:

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.