Astronomers - Study guides, Class notes & Summaries
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ASTR 231 final exam Questions And Answers |Success Guaranteed
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A few decades ago, there was great controversy among astronomers over the question of quasar distances, with some arguing that quasars are much nearer than application of Hubble's law would seem to imply. Why do nearly all astronomers now agree that quasars really are quite far away? - ️️We now have images and spectra that clearly show quasars to be embedded at the centers of distant galaxies and within distant galaxy clusters. 
A quasar's spectrum is hugely redshifted. What do most astron...
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ASTR 1303 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS
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Gravity is an ________ force between two objects with mass, acting along the line between them. - correct answer attractive 
 
How many stars are in the Milky Way galaxy? - correct answer 200 billion 
 
Newton's first law of motion says that an object at constant velocity will remain at constant velocity unless acted upon by a - correct answer force 
 
In his General Theory of Relativity, Einstein revised our understanding of - correct answer gravity 
 
Early astronomers believed the earth was ...
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PHSC 102 Exam Questions with Correct Answers
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PHSC 102 Exam Questions with Correct Answers 
 
How long does the sunspot cycle last, on average? 
Select one: 
a. 
about seven years 
b. 
about 76 years 
c. 
about 11 years 
d. 
between 25 and 35 days - Answer-11 years 
 
The vibrations of the Sun reveal information about 
Select one: 
a. 
the magnetic field of the Sun. 
b. 
the production of energy in the Sun. 
c. 
the structure of the atmosphere of the Sun. 
d. 
the interior structure of the Sun. - Answer-interior structure 
 
The most abund...
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ABCTE -The Solar System and the Universe question n answers graded A+
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ABCTE -The Solar System and the UniverseTools of the Astronomer - correct answer The basic tool that astronomers use to study celestial objects is the telescope. People tend to be most familiar with optical telescopes, but astronomers use telescopes that span the entire electromagnetic spectrum. 
 
Radio Waves - correct answer Radio waves are the longest waves of the electromagnetic spectrum. We use radio waves to broadcast radio, TV, and cellular phone signals. Radio waves are also used to pe...
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Astronomy Final Exam Study Guide Questions And Answers 100% Solved
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Astronomy Final Exam Study Guide 
Questions And Answers 100% Solved 
The way scientists know that a hypothesis is a reasonable description of nature is to... ️️Do 
experiments and observations about predictions of the hypothesis 
A lightyear is.... ️️The distance that light travels in one year 
A star is 230 light years away. the light we see tonight from that star left it.... ️️230 years 
ago 
The Star that provides energy for the Earth is..... ️️The Sun 
The location of the ...
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GACE Middle Grades Science Questions & Correct Answers | Latest Updated | Graded A+
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tidal hypothesis 
: Theory that the solar system started with a near collision of sun and large 
star. Few astronomers believe this theory. 
condensation hypothesis 
: solar system began with rotating clouds of dust and gas. Condensation 
happened in center to form sun, and smaller parts of clouds formed. More astronomers 
believe in this idea. 
Core 
: Outer core- liquid; inner core- solid. Very dense in center. Believed that core 
is 80% iron. Helps heat oceans. 
Mantle 
: Surrounds core. ...
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ASTR 205 or Astronomy 205 Assignment 1- Observational Study Athabasca University 2024 full
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Introduction 
 
This assignment is an introduction to familiarize myself with some aspects of observational astronomy. It consists of 4 different exercises, the first 3 dealing with observations of the night sky, and the last one dealing with observations of light sources through a diffraction grating. It has been designed with the intent to gain familiarity with the night sky, to gain experience in making basic astronomical observations, and to appreciate how astronomers make use of these obser...
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AST 111 Final Exam Study Guide || with Error-free Solutions.
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Why does the Moon show phases in the course of a month? 
a. the Moon glows from the inside, and its various continents glow different amounts 
b. the angle the Moon makes with the Sun changes and we see differing amounts of reflected sunlight 
c. more or less light from the Earth is reflected as the Moon turns around it 
d. clouds get in the way of the Moon's light and cover up parts of it 
e. the Earth's shadow falls on the Moon to different degrees as the Moon goes around correct answers b. ...
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Astro 102 Final Sets Questions With 100% Correct Answers | Latest Update
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Astro 102 Final Sets Questions 
With 100% Correct Answers | 
Latest Update 
What is the main reason that astronomers have devoted 
many years of effort to determining the rotation curve for 
the Milky Way galaxy - ANSWER : The rotation curve 
can be used to help us determine the distribution of the 
mass in the galaxy 
How does the diameter of the disk of the Milky Way 
compare to its thickness? - ANSWER : The diameter is 
about 100 times greater than its thickness 
The most common form...
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GACE science/math 088 questions and answers already passed
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GACE science/math 088 questions and 
 
answers already passed 
 
A group of students measured the boiling point of three different samples of pure water. Each 
measurement was made by a different student using the same thermometer. Their measurements 
were 94oC, 99oC, and 104oC. Which of the following most likely accounts for the discrepancy in 
the measurements? The students misread the markings on the thermometer. 
 
Option (B) is correct. The error that most likely accounts for the discrepanc...
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