If a group of galaxies is revolving around its center at 240 miles/sec how fast is it moving in miles/hr?

Q: A star, which is 2.3 x 1020 m from the center of a galaxy, revolves around that center once every…

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

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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 do deep images by the Hubble Space Telescope confirm the bottom-up theory of galaxy formation?

A: The bottom up model, also known as Hierarchal Clustering s the most accepted way for galaxy…

Q: If a galaxy is 500 Mly away from us, how fast do we expect it to be moving and in what direction?

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Q: Explain how the temperature of hot gas can be used to find out about the gravitational pull of a…

A: Given: The hot gas temperature which is used to find the gravitational pull To find: The explanation…

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: 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: What type of galaxy does this picture represent? O Elliptical O Irregular O Spiral

A: The galaxy of the shape of an ellipse is known as an elliptical galaxy.

Q: The Sun is located towards the edge of the galaxy (see the image on the next page), about 2/3rd of…

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Q: In the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the…

A: (1) The ideal gas law can be written as, PV=NkBT Here, P is the pressure, V is the volume, N is the…

Q: What happens when galaxies collide? A. Star collisions will be rare but the shapes of the galaxies…

A: You are correct. The answer is A. A. Star collisions will be rare but the shapes of the galaxies…

Q: How many galaxies are there in the universe?

A: A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and…

Q: What are the types of galaxies?

A: Required :   The types of galaxies.

Q: how many Galaxy are there in all?

A: The huge collection of gas, dust, and billions of stars and their stars, which are held together by…

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: How would our knowledge about galaxies be altered if we didn't have telescopes? Justify your answer.

A: If we did not have telescopes, it would be impossible to see other galaxies by naked eye, hence we…

Q: Describe the age and temperature of stars that make up spiral galaxies and their location.

A: A galaxy can be bombarded by other, smaller galaxies. Even if a galaxy is isolated, internal…

Q: If a galaxy is 100,000,000 parces away and has absolute magnitude of -20.0 what is the galaxies…

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Q: Identify a feature of the Whirlpool Galaxy that is visible in all several types of light. Explain…

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Q: when did the quasar emit the light that was observed?

A: Since, the quasar was found to be 8 billion light years away, the last light emitted by quasar was 8…

Q: What is formation and motion of galaxies?

A: Formation of galaxies:           Galaxies are collections of stars, gas, dust and dark matter held…

Q: Through the use of various measurement techniques, it has been found that most galaxies are rapidly…

A: Through the use of various measurement techniques, it has been found that most galaxies are rapidly…

Q: how far away is the galaxy

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Q: Astronomers observe several galaxies in the Local Group that actually approach the Milky Way. The…

A: Andromeda galaxy is the nearest galaxy to our Milky Way galaxy. It is approximately 2.5 million…

Q: In the reading, you were told that there were roughly 10,000 galaxies in the image of the Hubble…

A: Given:  one image of hubble ultra deep field is roughly 10 square arcminutes.  Number of galaxies in…

Q: what evidence is there that galaxies collide and merge?

A: The delicate distribution of matter in the galaxies causes the galaxies to collide and is said as…

Q: What do you mean by quasars?

A: The full form of QUASARS is Quasi Stellar radio sources.

Q: Assume that a typical galaxy contains about 200 billion stars and that there are more than 150…

A: Given, a typical galaxy contains about 200 billion stars and that there are more than 150 billion…

Q: When two galaxies collide, the stars inside them are not likely to be much affected, because the…

A: When two galaxies collide, the stars inside them are not likely to be much affected, because the…

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

A: Since your question has multiple-subparts, we will solve the first three sub-parts for you. If you…

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: What is the total mass of the Milky Way Galaxy?

A: The total mass of  milkyway galaxy is around 700 billion solar masses.

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.