ring galaxies often have nearby companions. What does that suggest?

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: A.black hole (m = 2. 90 × 10°M,) sits in the middle of the M87 galaxy. Calculate its gravitational…

A: Mass of the black hole is given as m = 2.9×109 Mswhere Ms = 1.99×1030 kgTherefore,m = 2.9×109 ×…

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: 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: 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 is the densest subsatnce in the universe?

A: At a modest temperature and pressure the most densest element on Earth surface is Osmium.

Q: What is the recession speed of a galaxy cluster which is 50Mpc away from Earth? Is the light from…

A: Hubble Law It state that distant galaxies are moving away from our earth with a recession…

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: a huge system of stats that has hundreds of millions to hundred of billions of stars that id…

A: In space hundreds of millions of stars Steller objects, dust , gas etc combine together a huge…

Q: Which galaxies are moving the fastest away from us?

A: Our nearest galaxy is Milky way.

Q: The evidence leads modern astronomers to conclude that at the cores of active galaxies are…

A: Required : Mass of Supermassive Blackholes in terms of solar mass.

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: 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: A star with mass m = 2.624 x 1030 kg revolves around the center of mass of the Milky Way galaxy in…

A: Given, Radius of orbit is 3.7*1020 meter and velocity is 400,000 m/s

Q: What value for the Hubble constant would another galaxy in the universe observe?

A: ANS: c) a unique Hubble constant for that specific location in the universe.

Q: Why aren’t the fluctuations there in the formation of Galaxies and other similar entities?

A: Galaxies and the other similar entities could not be without the existence of fluctuations in the…

Q: What does the redshift of the galaxies tell us about their motion with respect to the Earth?

A: The displacement of the spectrum of an astronomical object toward longer wavelength (red) due to the…

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: 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: 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: Observations of the central region of the galaxy M87 indicate that stars which are 60 light years…

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Q: An astronomer observed the motions of some galaxies. Based on his observations, he made the…

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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: How do galaxies form?

A: Two leading theories describe how the first galaxies were created. One says galaxies were born when…

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

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

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Q: If a galaxy is 18 Mpc from Earth and the Hubble constant is 70 km/s/Mpc, what is the recession…

A: Answer:-  Answer (1)  Given  Distance (d) = 18 Mpc  Hubble constant (Ho) = 70 km/s/Mpc  Velocity of…

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

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Q: What is formation and motion of galaxies?

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

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

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Q: Many RR Lyrae stars are found in open clusters in the plane of the galaxy.     True     False

A: An open cluster is defined as a group of up to a few thousand stars. Many RR Lyrae stars are found…

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

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Q: If astronomers find they have made a mistake and our Solar System is actually 7,350 pc rather than…

A: In the given question, We have to determine the mass of the galaxy within the orbit of the sun.

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

A: Radial velocity

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.