Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Question
Chapter 12.1, Problem 12.1CYU
To determine
The star that have the longest lifetime.
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Hertzsprung-Russell Diagram
Bhue or blue white
White
Vellow
Red-orange
Red
ORigel
Superglants
Beteignune
Main Sequence
Aldebaran
Glants
Sun
Alpho Centour B
Sinus B
White Dwarfs
50.000
20,000
10,000
Surface Temperature ('C)
6.000
5,000
3.000
Most of the stars shown on the diagram are classified as which type of star?
O white dwarf
O main sequence
O red giant
O super giant
Brightness
Increasing-
Which star in the table below has the least surface temperature?
Star Name
d (parsecs)
Parallax (seconds of arc)
Spectral Type
$$ \delta $$ Cen
0.026
B2 IV
HR 4607
0.039
G8 III
HR 4758
20
G0 V
HR 39801
0.005
M2 I
9 CMa
2.5
A1 V
a.
$$ \delta $$ Cen
b.
HR 4607
c.
HR 4758
d.
HD 39801
e.
9 CMa
Which star in the table below is the closest to Earth?
Star Name
d (parsecs)
Parallax (seconds of arc)
Spectral Type
$$ \delta $$ Cen
0.026
B2 IV
HR 4607
0.039
G8 III
HR 4758
20
G0 V
HR 39801
0.005
M2 I
9 CMa
2.5
A1 V
a.
$$ \delta $$ Cen
b.
HR 4607
c.
HR 4758
d.
HD 39801
e.
9 CMa
Chapter 12 Solutions
Understanding Our Universe
Ch. 12.1 - Prob. 12.1CYUCh. 12.2 - Prob. 12.2CYUCh. 12.3 - Prob. 12.3CYUCh. 12.4 - Prob. 12.4CYUCh. 12.5 - Prob. 12.5CYUCh. 12.6 - Prob. 12.6CYUCh. 12 - Prob. 1QAPCh. 12 - Prob. 2QAPCh. 12 - Prob. 3QAPCh. 12 - Prob. 4QAP
Ch. 12 - Prob. 5QAPCh. 12 - Prob. 6QAPCh. 12 - Prob. 7QAPCh. 12 - Prob. 8QAPCh. 12 - Prob. 9QAPCh. 12 - Prob. 10QAPCh. 12 - Prob. 11QAPCh. 12 - Prob. 12QAPCh. 12 - Prob. 13QAPCh. 12 - Prob. 14QAPCh. 12 - Prob. 15QAPCh. 12 - Prob. 16QAPCh. 12 - Prob. 17QAPCh. 12 - Prob. 18QAPCh. 12 - Prob. 19QAPCh. 12 - Prob. 20QAPCh. 12 - Prob. 21QAPCh. 12 - Prob. 22QAPCh. 12 - Prob. 23QAPCh. 12 - Prob. 24QAPCh. 12 - Prob. 25QAPCh. 12 - Prob. 26QAPCh. 12 - Prob. 27QAPCh. 12 - Prob. 28QAPCh. 12 - Prob. 29QAPCh. 12 - Prob. 30QAPCh. 12 - Prob. 32QAPCh. 12 - Prob. 33QAPCh. 12 - Prob. 34QAPCh. 12 - Prob. 35QAPCh. 12 - Prob. 36QAPCh. 12 - Prob. 37QAPCh. 12 - Prob. 38QAPCh. 12 - Prob. 39QAPCh. 12 - Prob. 40QAPCh. 12 - Prob. 42QAPCh. 12 - Prob. 43QAPCh. 12 - Prob. 44QAPCh. 12 - Prob. 45QAP
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- What are the approximate spectral classes of stars with the following characteristics? A. Balmer lines of hydrogen are very strong; some lines of ionized metals are present. B. The strongest lines are those of ionized helium. C. Lines of ionized calcium are the strongest in the spectrum; hydrogen lines show only moderate strength; lines of neutral and metals are present. D. The strongest lines are those of neutral metals and bands of titanium oxide.arrow_forwardLook elsewhere in this book for necessary data, and indicate what the final stage of evolution-white dwarf, neutron star, or black hole-will be for each of these kinds of stars. A. Spectral type-O main-sequence star B. Spectral type-B main-sequence star C. Spectral type-A main-sequence star D. Spectral type-G main-sequence star E. Spectral type-M main-sequence stararrow_forwardAn eclipsing binary star system is observed with the following contact times for the main eclipse: each star in the system. The orbital velocity of the smaller star relative to the larger is 62,000 km/h. Determine the diameters for each star in the system.arrow_forward
- The lowest mass for a true star is 1/12 the mass of the Sun. What is the luminosity of such a star based upon the mass-luminosity relationship?arrow_forwardQUESTION 8 Which of the following will occur to our Sun at some point in the future? (Select all that apply) The sun will explode as a supernova The core of the sun will become a white dwarf The core of the sun will become a neutron star The core of the sun will become a black hole V The sun will become a red giantarrow_forwardWhich statement is most logical? a First stars are thought to have been more massive than Sun because the materials used to make clouds were more abundant at the beginning b First stars are thought to have been more massive than Sun because the temperatures of the clouds that made them were higher because they consisted entirely of hydrogen and helium c First stars are thought to have been more massive than Sun because star-forming clouds were much denser early in time d First stars are thought to have been more massive than Sun because the clouds that made them were much more massivearrow_forward
- What star has the largest stellar parallax as measured from opposite ends of the Earth's orbit about the Sun? Group of answer choices Sirius The Sun Barnard's star Proxima Centauri Alpha Centauriarrow_forwardHertzsprung-Russell Diagram Blue or blue-white White Yellow Red-orange Red O Rigel Supergiants Beleigne Main Sequence Aldebaran Glants Sun O Alpho Centaur B Sirus B White Dwarfs 50,000 20,000 10,000 6,000 5,000 3,000 Surface Temperature ('C) What is the color of the stars shown on the diagram that have the lowest surface temperature? O red O yellow O blue O white - 6useanuarrow_forwardWhich star in the table below has the greatest diameter? Star Name d (parsecs) Parallax (seconds of arc) Spectral Type 65 Tau 0.025 A7 IV HR 4621 B2 IV $$ \alpha $$ Pic 20 A7 V 58 Ori 0.005 M2 I HR 2491 2.5 A1 V a. 65 Tau b. HR 4621 c. $$ \alpha $$ Pic d. 58 Ori e. HR 2491arrow_forward
- Hertzsprung-Russell Diagram Blue or blue-white White Yellow Red orange Red Superglants Beleigese Main Sequene Aldenaran Glants Suno Aipho CetorE Sinus B White Dwarfs 50,000 20,000 10.000 6,000 5,000 3,000 Surface Temperature (C) Which star listed below is the brightest? Sun O Sirius B O Betelgeuse O Rigel Brightnessarrow_forwardHertzsprung-Russell Diagram Blue or blue-white White Yellow Red orange Red O Rigel Superglants Betelger Main Sequence ANdetaran Glants Caur Sirus 5 White Dwarfs 50,000 20,000 10,000 6,000 5,000 3,000 Surface Temperature (C) Would the surface temperature of the stars classified as white dwarfs be generally higher or lower than that of the stars classified as giants? O higher O lower 29 30 31 32 33 34 35 36 37 ere to search -6useanuarrow_forwardA giant structure with billions of stars and sometimes gas and dust is called a O galaxy O star system O universe O supernovaarrow_forward
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