We see the same number of stars in all directions in the sky. This leads astronomers...
We see the same number of stars in all directions in the sky. This
leads astronomers to conclude that our galaxy is in the shape of a
disk.
True or false?
Homework Answers
True
This concept leads to believe that our galaxy is in the shape of a disk or wheel.
Remember we are in Milky Way galaxy. A universe is composed of different galaxies, galaxies comprise of different stars and the stars are comprised of different planets.
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We see the same number of stars in all directions in the sky. This
leads astronomers...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all that apply O Radio, X-ray,and gamma ray observations show gas in a band across the sky O Infrared observations show dust in a band across the sky O Individual stars appear in a band across the sky O Globular clusters appear in all directions on the sky Question 15 1pts Which observation(s) provide evidence that our galaxy formed...
Astronomers treat the number of stars in a given volume of space as a Poisson random...
Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is ten stars per 16 cubic light-years. •What is the probability of at least one star in 5 cubic light-years? •How many stars would you expect there to be in 50 cubic light-years?
Astronomers can't travel to the stars. Telescopes do all the work. How do we know that...
Astronomers can't travel to the stars. Telescopes do all the work. How do we know that the spectra of a star is what we say it is? That is, how do we know those elements and molecules are there, even though the star is trillions of miles away? What does a spectra that is shifted tell us about a star or galaxy?
Astronomers treat the number of stars in a given volume of space as a Poisson random...
Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 4 or more stars in 16 cubic light years? Probability = i . [Round your answer to three decimal places (e.g. 98.765).] (b) How many cubic light years of space must be studied so that...
Question 17 x Incorrect. Astronomers treat the number of stars in a given volume of space...
Question 17 x Incorrect. Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 2 or more stars in 16 cubic light years? 0.019 Probability = J. [Round your answer to three decimal places (e.g. 98.765).] (b) How many cubic light years of space must...
1.What is true about the galaxies in our Universe? They are all the same shape They...
1.What is true about the galaxies in our Universe? They are all the same shape They are all the same size They are all spread out evenly throughout space They orbit each other in clusters 2.An Sa galaxy is best described by which of the following: A spiral galaxy with loosely wound arms A spiral galaxy with tightly wound arms An irregular galaxy A barred spiral galaxy 3.What is located at the very center of most galaxies? globular clusters our...
stion 7 ation the grains are elongated, or have approximately the same dimension in all directions...
stion 7 ation the grains are elongated, or have approximately the same dimension in all directions True False
YOU FOCUS YOUR ATTENTION ON THE STARS that are contained within or very close to THE CONSTELLATIO...
YOU FOCUS YOUR ATTENTION ON THE STARS that are contained within or very close to THE CONSTELLATIONS OF THE ZODIAC groups such as Taurus the Bulland Gemini the Twins (etc). Page 20 of 34 and stars very close to the zodiac constellations such as Sirius (the Dog Star) & Betelgeuse (the Hunter's Shoulder) From here on in this exam, the word STAR will always be used to refer to such objects- to constellations. Even ifyou have learned somewhere that our...
choose correct answer. no explanation needed QUESTION 10 How do astrophysicists account for neutrino emission from...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
1. All the planets orbit the Sun in the same direction. This is strong evidence that:...
1. All the planets orbit the Sun in the same direction. This is strong evidence that: Group of answer choices None of these is correct. We do not have any idea yet why the planets are orbiting in the same direction. the solar system resulted from the collision of two medium-sized stars. after the planets formed, collisions between them eventually caused them all to move in the same direction. the planets were formed elsewhere in the galaxy and were later...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all that apply O Radio, X-ray,and gamma ray observations show gas in a band across the sky O Infrared observations show dust in a band across the sky O Individual stars appear in a band across the sky O Globular clusters appear in all directions on the sky Question 15 1pts Which observation(s) provide evidence that our galaxy formed...
Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 4 or more stars in 16 cubic light years? Probability = i . [Round your answer to three decimal places (e.g. 98.765).] (b) How many cubic light years of space must be studied so that...
Question 17 x Incorrect. Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 2 or more stars in 16 cubic light years? 0.019 Probability = J. [Round your answer to three decimal places (e.g. 98.765).] (b) How many cubic light years of space must...
stion 7 ation the grains are elongated, or have approximately the same dimension in all directions True False
YOU FOCUS YOUR ATTENTION ON THE STARS that are contained within or very close to THE CONSTELLATIONS OF THE ZODIAC groups such as Taurus the Bulland Gemini the Twins (etc). Page 20 of 34 and stars very close to the zodiac constellations such as Sirius (the Dog Star) & Betelgeuse (the Hunter's Shoulder) From here on in this exam, the word STAR will always be used to refer to such objects- to constellations. Even ifyou have learned somewhere that our...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
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