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 greater amount than Y. Which star is farther away from Earth? - ✔✔Star Y
A star has a parallax angle of 0.3 arcseconds. Which of the following is the most likely distance for the
star? - ✔✔10 parsecs
Which of the following tells us how bright an object will appear from Earth? - ✔✔apparent magnitude
A nearby supernova appears almost as bright as a full moon. Which of the following would be an
appropriate apparent magnitude for the supernova? - ✔✔-10
Star A has an apparent magnitude of 1.0 and an absolute magnitude of 1.0. How would the apparent
and absolute magnitudes of this star change if the distance between Earth and the star were decreased?
- ✔✔The apparent magnitude number would decrease, and the absolute magnitude number would not
change
Which of the following properties of a star has no relationship with its distance from earth? -
✔✔luminosity
When an electron drops to a lower energy level, what occurs? - ✔✔A photon is emitted
Which of the following is a TRUE statement about atoms and electrons? - ✔✔Every atom has a unique
set of energy levels
, What type of spectrum is produced when light emitted directly from a hot, low density cloud of gas
passes through a prism? - ✔✔Emission
Stars generally exhibit: - ✔✔an absorption spectrum
Astronomers observe a star with a very blue spectrum and high surface temperature. What is the most
likely spectral type of this star? - ✔✔O
You see a list of stars arranged by color:
1. Red
2. Yellow
3. Blue
This same list is also in order of: - ✔✔coolest to hottest
What do astronomers observe to determine a star's temperature? - ✔✔The star's spectrum
The stars Betelgeuse and Rigel each have the same luminosity, but the temperature of Betelgeuse is
lower than Rigel. Which star is larger? - ✔✔Betelgeuse
Stars of similar temperatures but different sizes will have: - ✔✔Similar colors but different luminosities .
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the
same_________. - ✔✔Temperature
On the HR diagram, which direction indicates that stars are getting bigger (larger radius)? -
✔✔Diagonally from lower left to upper right
The most stars, including the Sun, belong to which group? - ✔✔Main Sequence
Where are Supergiants located on the HR diagram? - ✔✔Upper Right Corner
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 greater amount than Y. Which star is farther away from Earth? - ✔✔Star Y
A star has a parallax angle of 0.3 arcseconds. Which of the following is the most likely distance for the
star? - ✔✔10 parsecs
Which of the following tells us how bright an object will appear from Earth? - ✔✔apparent magnitude
A nearby supernova appears almost as bright as a full moon. Which of the following would be an
appropriate apparent magnitude for the supernova? - ✔✔-10
Star A has an apparent magnitude of 1.0 and an absolute magnitude of 1.0. How would the apparent
and absolute magnitudes of this star change if the distance between Earth and the star were decreased?
- ✔✔The apparent magnitude number would decrease, and the absolute magnitude number would not
change
Which of the following properties of a star has no relationship with its distance from earth? -
✔✔luminosity
When an electron drops to a lower energy level, what occurs? - ✔✔A photon is emitted
Which of the following is a TRUE statement about atoms and electrons? - ✔✔Every atom has a unique
set of energy levels
, What type of spectrum is produced when light emitted directly from a hot, low density cloud of gas
passes through a prism? - ✔✔Emission
Stars generally exhibit: - ✔✔an absorption spectrum
Astronomers observe a star with a very blue spectrum and high surface temperature. What is the most
likely spectral type of this star? - ✔✔O
You see a list of stars arranged by color:
1. Red
2. Yellow
3. Blue
This same list is also in order of: - ✔✔coolest to hottest
What do astronomers observe to determine a star's temperature? - ✔✔The star's spectrum
The stars Betelgeuse and Rigel each have the same luminosity, but the temperature of Betelgeuse is
lower than Rigel. Which star is larger? - ✔✔Betelgeuse
Stars of similar temperatures but different sizes will have: - ✔✔Similar colors but different luminosities .
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the
same_________. - ✔✔Temperature
On the HR diagram, which direction indicates that stars are getting bigger (larger radius)? -
✔✔Diagonally from lower left to upper right
The most stars, including the Sun, belong to which group? - ✔✔Main Sequence
Where are Supergiants located on the HR diagram? - ✔✔Upper Right Corner
