A high luminosity star - Study guides, Class notes & Summaries
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astro 1-exam 3 questions and answers 100% pass
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astro 1-exam 3 questions and answers 100% pass 
what is the sun comprised of? - ANSWER -73% hydrogen 25% helium 
why is the sun stable? - ANSWER -outward force of gas pressure; inward force of gravity 
Where does the gas pressure in the sun come from? - ANSWER -nuclear fusion reactions in the core at 
temperatures of 15 million degrees 
What is the diameter of the sun compared to earth? mass? luminosity (compared to 100W lightbulbs? - 
ANSWER -diameter-109x; mass-333,000; luminosity- 4 x 10^24 
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Astro 7N Final Exam Questions and Correct Answers Latest Update 2025 Already Passed 
the sun is composed mostly of - Answers gas 
- hydrogen (73%) 
- helium (25%) 
the sun is stable due to balance of - Answers - gravity (inward force) 
- gas pressure in hot interior (outward force) 
what is the temperature of the gas pressure nuclear fusion reactions in the sun's core - Answers 15 million degrees kelvin 
diameter and mass of the sun - Answers diameter: 109 x Earth's 
mass: 333,000 x Earth...
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Apparent and Absolute Magnitude Test Questions and Answers
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Apparent and Absolute Magnitude Test Questions and Answers 
Absolute Magnitude cont... more - Answer-Stars more than 32.6 LY away appear dimmer than they are 
High apparent magnitude and low absolute magnitude 
If a star is 32.6 LY away, its absolute and apparent magnitudes will be the same. 
 
Hertzsprung-Russell (H-R) Diagram - Answer-Shows relationships between absolute magnitude and temperature of stars. 
Can also show the relationship between temperature and luminosity 
As temperature incre...
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Chapter 10 Questions and Answers 2024
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Chapter 10 Questions and Answers 2024 
The star Bernard's Star has an apparent magnitude of 9.5 and the star Lelande 21185 has an apparent magnitude of 7.5. Which one is brighter? By how many times? 
Lelande 21185 is the brighter star as the more negative the magnitude is, the brighter the object is. Subtract the two magnitudes and take the absolute value to get a positive answer. Then use that answer as the power on 2.512. 
|9.5-(+7.5)| =2| =2| 
2.5 ^2 = 6.25 
Therefore Lelande 21185 is about ...
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Astronomy 102 Final Exam | 100% Correct Answers | Verified | Latest 2024 Version
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To find the most accurate distance to a nearby star using parallax, astronomers could compare the view 
of the star against the background stars at what times of the year? - In January and July 
Which of the following correctly expresses the distance to a nearby star? - 1.3 parsecs 
Consider two stars (Y and Z) that both exhibit parallax. Star Z appears to move back and forth against the 
background stars by a greater amount than Y. Which star is farther away from Earth? - Star Y 
A star has a p...
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A high luminosity star - Answers Emits more light than a low-luminosity star 
If a red giant appears the same brightness as a red main sequence star, which one is farther away? - Answers The red giant 
The heaviest nuclei of all are formed... - Answers During a supernova explosion 
Hydrogen-2 + proton = ____ + energy: - Answers Helium-3 
Which of the following has the smallest radius? - Answers Neutron star 
Why does the m...
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Astro 7N Exam 2 Questions with 100% Correct Answers | Verified | Latest Update 2024
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Astro 7N Exam 2 Questions with 100% Correct Answers | Verified | Latest Update 2024
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Astro 7N EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+ 
 
A high-luminosity star... 
 
A. is always at a larger distance than a low-luminosity star 
B. emits more light than a low-luminosity star 
C. is always redder than a star with a lower luminosity 
D. is at a lower temperature than a low-luminosity star 
E. is always at a smaller distance than a low-luminosity star - Answers - emits more light than a low-luminosity star 
 
If a red giant...
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Astronomy 102 Final Exam | 100% Correct Answers | Verified | Latest 2024 Version
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Astronomy 102 Final Exam | 100% Correct 
Answers | Verified | Latest 2024 Version 
To find the most accurate distance to a nearby star using parallax, astronomers could compare the view 
of the star against the background stars at what times of the year? - In January and July 
 
Which of the following correctly expresses the distance to a nearby star? - 1.3 parsecs 
 
Consider two stars (Y and Z) that both exhibit parallax. Star Z appears to move back and forth against the 
background stars by a...
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Astro 7n Exam 2 |2024 UPDATE |REAL EXAM QUESTIONS AND VERIFIED ANSWERS/ACCURATE SOLUTIONS |GET IT 100% CORRECT!! ALREADY GRADED A+
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Astro 7n Exam 2 |2024 UPDATE |REAL EXAM 
QUESTIONS AND VERIFIED 
ANSWERS/ACCURATE SOLUTIONS |GET IT 100% 
CORRECT!! ALREADY GRADED A+ 
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balance of gravity (inward force) and gas pressure in its hot interior (outward 
force) 
Choose matching term 
1 if a star begins with about 8-40 solar masses (fate of stars) 
2 what makes the sun stable? 
3 H-R diagram vertical axis 
4 
A 2-solar-mass main sequence star is at...
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