2. What features vary from one galaxy to the next?

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

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Q: 3) indicate which locations in the H-R diagram correspond to places where the evolution is slow.…

A: Using the H-R diagram shown the places where the evoultion has been slow is identified.

Q: What is nebulae?

A: The  cloud of dust and gas that is known to fill up the space between stars in the solar system such…

Q: The Messier Catalog is a. a listing of all the stars within the Local Bubble b. a list of all the…

A: The Messier catalog is a list of 110 commonly found objects in the night sky that can be easily…

Q: Q12. Calculate the distance of a star if you know that its absolute magnitude is equal to (2m) and…

A: Answer 12 Given,   Absolute Magnitude, M=2 m apparent magnitude, m= -2m

Q: Edwin Hubble established the existence of separate, distant galaxies when he found __________ stars…

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Q: late the distance of a star if you knowt

A: The formula for the distance to a star based on it apparent and absolute magnitude is: d =…

Q: 4) Using the Boltzmann equation, calculate the ratio of atoms in the n=2 to n=1 energy levels for…

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Q: 3. A binary star system has magnitude - 1, when both stars are observed together. One of the stars…

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Q: 1. Using the parallax method, let us now calculate the distance to a-Centauri (pronounced as "Alpha…

A: Given Data: The parallax angle is, θ=1.5096°   Part (1): From the given triangle in the question, we…

Q: State the grand unified theory.

A: There are four fundamental forces in nature: Electromagnetic forces. Gravitational forces. Strong…

Q: classification helped Darwin understand how creatures evolve. How has classification helped you…

A: Our universe contains million number of stars. These stars continuously emit light radiation, heat…

Q: Suppose you measure the radial velocity of a galaxy to be 5,000 km/s. How far away is it?

A: According to the Hubble's law, the radial velocity is given by  radial velocity = Ho x D where, Ho…

Q: 4. What is the distance in kilometers to a star that is 4.2 light years away?

A: We know velocity of light (c)= 3×10^8 m/s                                             =3 ×10^5 km/s…

Q: 7. Over the course of 6 months, a star's parallax angle is measured to be 0.083 arcseconds. What is…

A: Given. The parallel angle = 0.083 seconds. Cource is 6 months  Radius of rotation of earth is…

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: 3. At what distance is an object if its parallax, as measured from either end of a 1000-km baseline,…

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Q: a. What type of galaxy? spiral b. What type of galaxy? irregular c. What type of galaxy? d. What…

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Q: What are the types of galaxies?

A: Required :   The types of galaxies.

Q: Our Solar System completes one orbit every 200 million years around the Galactic Center. Our Sun is…

A: The number of revolutions of the solar system around the galactic center will be equal to the number…

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: Another way of explaining a word is to enumerate the different parts of which it is made: “X…

A: The Solar system consists of our star, i.e. the Sun, and planets and heavenly bodies which are…

Q: Part 2 of 3 Now we can use the small angle formula to calculate the distance (in pc). 2.06 x 105 D =…

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Q: 2. Over several months an astronomer observes an exoplanet orbiting a distant star at a distance of…

A: We have, T=2πRvv=GMstarR T=3.875 years =3.875×365×24×60×60 seconds =122202000 secondsR=5.934 AU…

Q: QUESTION 6 A galaxy is discovered at a distance of 11 billion light-years from our solar system. We…

A: Here, We are given that a galaxy is discovered at a distance of 11 billion light - years from our…

Q: The Andromeda Galaxy is 2 million light years away from the Milky Way.  How far away is the…

A: A light year is the distance travelled by the light in a year

Q: A scientist, using a telescope, sees arcs of light around a galaxy. In 3–5 sentences, explain the…

A: Answer:-    A scientist, using a telescope, sees arcs of light around a galaxy. The arcs of light…

Q: The galaxy picture below would best be classified as O Elliptical galaxy O Spiral Galaxy

A: Spiral galaxy

Q: How far, in parsecs, is an object that has a parallax of 1 arc second? How far is it, in light…

A: By the fundamental unit of astronomy; "A star with a parallax of 1 arcsecond has a distance of 1…

Q: List the seven main classes of stars, from hottest to coolest.

A: The hottest stars are denoted by the letter O, with the sequence progressing through B, A, F, G, K…

Q: distant galaxy has an apparent magnitude of 10 and is 4,000 kpc away. What is its absolute…

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Q: The diameter of our disk-shaped galaxy, the Milky Way, is about 1.0×105light-years. The distance to…

A: Given data The diameter of the disk-shaped milky way galaxy in light years is Dg_ly = 1 x 105…

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

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Q: What evidence can you cite that the nucleus of the galaxy contains a supermassive energy source that…

A: First of all the supermassive energy source at the centre of galaxy is not actually very small. It…

Q: billion .stars in the Milky Way 100 and 300 O 100 and 400 O 100 and 200 O 100 and 500 O No one of…

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Q: Hubble's galaxy classification diagram (the "tuning fork"), suggests the existence of black holes…

A: Hubble's galaxy classification diagram (the "tuning fork")

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: Distances to the nearest stars (up to 500 ly away) can be measured by a technique called parallax,…

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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.