If astronomers find they have made a mistake and our Solar System is actually 7,350 pc rather than 8,300 pc from the center of the Milky Way Galaxy, but the orbital velocity of the Sun is still 225 km/s, what is the minimum mass (in solar masses, MSun) of the Galaxy within the orbit of the Sun?

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: What color is the center of this galaxy and why?

A: The supermassive black hole is the centre of the galaxy is located at inside the bright white patch…

Q: It can be shown that if an object orbiting a star of mass M in a circular orbit of radius R has…

A:

Q: Pls help ASAP. Pls show all work.

A: Given  r = 30 kpc Velocity curve To find out  Total mass of the galaxy ( estimated )

Q: A starburst galaxy produces only 50 new stars per year. (True or false)

A: A starburst galaxy is known for its high rate of star formation in comparison to the other galaxies.…

Q: Astronomers now think that there is a black hole with more than 4 milliion times the mass of our Sun…

A:

Q: Let us assume that our galaxy consists of 2.5 × 1011 stars each of one solar mass. How long will a…

A: Mass of the galaxy is

Q: how might you be misled if you studied only the brightest galaxies in a cluster?

A: There are some of the observations which may mislead if you studied only the brightest galaxies in…

Q: what is the difference between a Sa and a Sb galaxy? Between a SBb and a Sb?

A: Galaxy morphological classification is formed by the division of the galaxies into groups on the…

Q: Does Hubble’s Law have anything to say about the motion of stars relative to other stars in the same…

A: Hubble's law in cosmology is an observation which states that when seen from earth, galaxies are…

Q: The Sun orbits the center of the Milky Way galaxy once each 2.60 × 108 years, with a roughly…

A: Velocity is,

Q: which galaxies are poorest in gas and dust? Which have the fewest bright stars?

A: Elliptical galaxies contains primarily old stars and they do not have much gas and dust. The…

Q: Recall that Hubbleʹs law is written v = H0d, where v is the recession velocity of a galaxy located a…

A: Given data: Hubble's constant (H0) = 80 km/s/Mpc Distance (d) = 800 Mpc Required: Recession velocity…

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: Our Solar System is about 8.3 kpc from the centre of our galaxy. Using Newton's Universal…

A:

Q: Can we measure distances to other galaxies using parallax?  Why or why not?

A:

Q: If the Hubble constant equals 70 km/s/Mpc, the age of the universe roughly equals   a. 6 billion…

A: Given:Hubble's constant H=70km/s/MpcTo find:Age of universe=??

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: The Sun orbits the center of the Milky Way galaxy once each 2.60 × 108 years, with a roughly…

A: Given:

Q: A black hole (m = 2.90 x 10^9 Ms) sits in the middle of the M87 galaxy. Calculate its gravitational…

A: mass of black hole = 2.90×109 MsMs = 1.99×1030 kg

Q: A star at a distance of 50000 light years from the center of a galaxy has an orbital speed of 100…

A:

Q: The Sun has an orbital speed of about 220 kms−1 around the centre of the Galaxy, whose distance is…

A:

Q: You observe a star orbiting in the outer parts of a galaxy. The distance to this galaxy is known,…

A:

Q: What would be the critical density of matter in the universe if the value of the Hubble constant…

A:

Q: A star at a distance of 50000 light years from the center of a galaxy has an orbital speed of 100…

A: Distance of the star from the center of the galaxy, r = 50000 ly The orbital speed of the star, v =…

Q: Based on the value you have found in problem 3, if the mass of the Sun is about 2.0 x 1030 kg, what…

A: Given data The mass of the sun is given as ms = 2 x 1030 kg. The value found in the previous…

Q: The lower limit of the mass of the galaxy is a. 100 solar masses. b. 100,000 solar…

A: A lower mass limit is provided because of the timing argument.  The timing argument states that all…

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

A:

Q: Is the NGC 4440 galaxy observable from the Calar Alto Observatory?

A: Calar Alto Observatory Calar Alto, a 2,168-meter-high (7,113-foot) mountain in the Sierra de Los…

Q: A star near the visible edge of a galaxy travels in a uniform circular orbit. It is 43,500 ly…

A:

Q: If astronomers were to find they have made a mistake and our solar system is actually 7.8 (rather…

A: Let m be defined as the mass of the sun, and M be defined as the mass of the galaxy. Since the sun…

Q: Suppose you have obtained spectra of several galaxies and have measuerd the observed wavelength of…

A:

Q: what evidence is there that galaxies contain dark matter? Supermassive black holes?

A: By the studies of rotation of galaxy, astronomers estimate that the 10% mass of galaxy is in the…

Q: Suppose you have obtained spectra of several galaxies and have measuerd the observed wavelength of…

A:

Q: The Hubble Law, equation (D), can be used to determine the age of the universe. Using your average…

A:

Q: If a galaxy has a radial velocity of 21,641 km/s, what is its expected distance from the Hubble Law?…

A: Given data :  Radial velocity of galaxy (V) = 21,641 km/s Humble constant (Ho) = 71 km/s/Mpc…

Q: Of the following groupings of galaxies, the one that is largest in size is the   a. Local…

A:

Q: Suppose you have obtained spectra of several galaxies and have measured the observed wavelength of…

A: Radial velocity

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.