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

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

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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: In the image below you see two interacting galaxies; one is nearly face -on and the other is nearly…

A: The shape of the galaxies says the evidence of the tidal disruption.

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: A galaxy cluster has a recessional velocity of 19,000 km/s. Using the best estimate for Hubble's…

A: To calculate the distance of the distant galaxies in megaparsecs (Mpc) Hubble’s law is used. If the…

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: 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: What is the distance in parsec to pulsar 0628-28 using 400 and 600 MHz frequencies? The dispersion…

A: GIven for pulsar 0628-28, dispersion measure DM is 124.5We have to determine distance in parsec to…

Q: Spiral Galaxy with 3 differences each and 2 similarities.

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Q: galaxy cluster in Ursa Major has a recessional velocity of 15000 km/sec. Using the best estimate for…

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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: Certain spiral galaxy is 10.6 Mpc away from us. How fast in km/s is this galaxy moving away from us?…

A: Given,  Distance of Galaxy is = 10.6 Mpc The value of Hubble constant = 71 km/s/Mpc We need to…

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

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Q: State three differences between the elliptic galaxy and the spiral galaxy.

A: Elliptic galaxy : the shape of elliptical galaxies are like a spheroid, or we say elongated sphere.…

Q: Calculate the age of the universe for the following Hubble's constant, 200 1... - N (d) 20 km/s/Mpc

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

Q: What are the types of galaxies?

A: Required :   The types of galaxies.

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: 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: Under what circumstances would the slope of the best-fitted line in Figure decrease:

A: Required The correct choices.

Q: There exists an element visible in the spectrum of galaxies that shows the following spectra when…

A: Introduction: The Doppler effect refers to the apparent shift in the wavelength of a wave when there…

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

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

A: The origin of ring galaxies is often debated. Some scientists believe that ring galaxies have formed…

Q: How do galaxies form?

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

Q: How do we know galaxies are moving away from us?

A: Electromagnetic radiations are affected by the Doppler shift. When the source is in relative motion…

Q: 4) Calculate the redshift of a galaxy with a recessional velocity of 0.68c. (

A: When a celestial object is moving away from the observer the light observed from the object will…

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

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Q: To what extent do astronomers have the ability to see into the history of the universe?

A: Introduction: We are all aware that time travel is not feasible, so an astronomer cannot use A time…

Q: The Perseus-pices supercluster of galaxies is 64 Mpc from Earth. How long (in years) does it take…

A: Given: Perseus-pices supercluster separation from earth→D=64 Mpc Standard conversion: 1…

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.