Planets around stars other than the sun have recently been discovered by: * A. The variation in the Doppler shift in the star's spectrum. B. The astrometric motion of the stars on the sky. C. Direct imaging D. It is impossible to detect planets around other stars
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A: If an object formed from a cloud of dust and gas is less than 0.08 solar mass, it forms a brown…
Q: bsorption lines produced by interstellar gas a. are wider than the lines from stars because the…
A: Introduction: The gas between stars is mostly hydrogen and helium scattered at varying densities…
Q: Which of the following can explain how we can calculate distances to stars despite being able to…
A: Parallax is a technique used to measure the distance to a star by observing its apparent shift in…
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A: Correct option is (b) i eagnetic field lines tangling .
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A: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a white…
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Q: If steel has ten times the density of water, how many times more dense is the hydrogen plasma at the…
A: Soln: Density of water (SW ) = 1 gm/cm3 ---- (1) As density of steel is…
Q: 1. A helium flash a. is sudden and powerful. b. destroys the star. c. is a slow expulsion of helium…
A: A very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the…
Q: The Hertzsprung-Russel Diagram (Figure 4) shows patterns of __, __, and __ of __ a. distance,…
A: Hertzsprung Russel diagram shows the different stages in the life of a star. It basically shows the…
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…
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A: Given statement : "Giant and supergiant stars are 10 to 1,000 times larger in diameter than the…
Q: 19. A laser beam takes 0.024s to jravel from a rocket to the reflective surface of a planet and back…
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Q: "Star Formation and Lifetimes" pg. 120, question 7 A star with twice the mass of the Sun would have…
A: In stars higher mass leads to higher compression. Which results higher Central density and…
Q: What is the best technique of those below to determine the size of an exoplanet? A. Gravitational…
A: Given :- to determine the size of exoplanet
Q: Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
A: 1. Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
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A: Zero Age Main Sequence (ZAMS) is the time when a star first joins the main sequence on the…
Q: ow is Doppler shift used in detecting extra solar planets? * A. Scientists observe those stars…
A: In our solar system, all bodies orbit a common center of mass, including the Sun, but the Sun is so…
Q: Which of these is NOT used as a spiral tracer? a. O stars b. B stars c. young open clusters…
A: Spiral tracers are objects that are commonly found in spiral arms and soare used to trace spiral…
Q: sun's position relative to planetary orbits
A: Solution
Q: Solar scientists want to measure the temperature inside the sun by sending in probes. Imagine that…
A: Increase in temperature for every 10,000 km below the surface of sun = 106 oCCost of measuring x…
Q: A group of four stars, all the same size, have the four different surface temperatures given below.…
A: Temperature of star
Q: Which of the following spectral classes has stars with the hottest temperature? a. F0 b.…
A: Here given the stars with spectral classes.We have to find the stars which is hottest.
Q: Calculate the size of the Schwarzschild radius for the Sun. Choose the option below that most…
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Q: Which of the following observations would support the solar nebula theory over the passing star…
A: Introduction: The nebular hypothesis is the most widely accepted model in the field of cosmogony to…
Q: Radio maps of the spiral arms of our galaxy a. reveal that our galaxy is a grand design spiral.…
A: Radio maps of the spiral arms of our galaxy map the location of dense neutral hydrogen clouds.
Q: The Sun's photosphere is a. the central region where the Sun originates b. the part of the Sun…
A: The correct option is B.the photosphere is the part of the sun whistle light comes that we see when…
Q: The horizontal branch stars are giants fusing what element in their cores and then their shells?…
A: The horizontal branch is a stellar evolution stage after the red-giant branch.
Q: Why are all large celestial bodies (stars, planets, larger moons) very nearly spherical in shape?…
A: For the shape to be a sphere, the force needs to have two types of characteristics-1. The force…
Q: Our Solar System consist of two distinctly different types of planets. A. Describe how these…
A: The solar system consists of two types of planets, 1. Terrestrial planet – First four – Mercury,…
Q: Stars A and B both have the same spectral class. Star A is 7 times farther away than star B. The…
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Q: As a star collapses, the conservation of angular momentum states that it will spin a. faster.…
A: When a star collapse a neurton star or black hole is formed which has much smaller radius than the…
Q: How long does it take for energy produced in the Sun's core to reach the photosphere?
A: Ans. (E) : a few hundred thousand years. Explanation :-
Q: 6) How many 60 Watt bulbs would it take to equal the luminosity of the Sun? a. 1000 b. 2.4 X 10^26…
A: Given value--- power of one bulb = 60 W. We have to find--- How many 60 Watt bulbs would it take…
Q: Imagine there is a large star that produces 2.5 x 1030 Watts of power. If there is a planet orbiting…
A: Power of a star (P) = 2.5×1030 Watt distance of planet (d) = 500 million km
Q: Absorption lines produced when starlight travels through the interstellar medium indicate that some…
A: The answer for the following question is
Q: A star’s classification is K5 III. What is the temperature of this star? a. 3000 K b. 8000 K…
A: According to the HR ( Hertzsprung - Russell ) diagram , The star classification according to their…
Q: A planet orbits a star in a different stellar system The mass of the planet is 2 times Jupiter's…
A: This question is about to find gravitational force between star and planet in compare to…
Q: Stars are born in a. reflection nebulae. b. dense molecular clouds. c. HII regions. d.…
A: Option (B): Dense molecular cloud.
Q: 6 Which of the following methods has led to the most discoveries of massive planet A B с D Detecting…
A: 16. Solution: The most successful method of detection of the planet is the radial velocity method…
Q: Stars appears to move from east to west because A. all stars move from east to west B. the…
A: Option b
Q: 1. What are the two most abundant elements found in stars?
A: Hydrogen and Helium are the two most abundant elements found in stars. Protons and neutrons fused to…
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