Astronomy Stars Exam Questions with Correct Answers Latest Update 2025-2026
Average solar temperature - Answers Effective temperature
Where sun emits radiation - Answers Photosphere
Suns lower atmosphere - Answers Chromosphere
Region on top of photosphere where temp raises dramatically - Answers Tradition zone
Thin upper layer hot atmosphere - Answers Corona
What does corona turn into - Answers Solar wind
Region where the material of the sun is in constant convective motion - Answers Convection zone
Zone under convection where solar energy is transported towards surface - Answers Radiation zones
Amount of solar energy reaching this surface each second is a quantity - Answers Solar constant
What is it called when a Stars pressure outward pushed exactly counteracts gravity inward pull -
Answers Hydrostatic equilibrium
What is the study of solar surface patterns - Answers Helioseismoly
What are regions of bright and dark gas - Answers Granules
Where does visible light come from in the star - Answers Photosphere
Who's planets density is most like the sun - Answers Jupiter
The sun is a stable star because - Answers Gravity balances Forces from pressure
How long does it take for a photon to escape - Answers A million years
What is probably responsible for the increase in temperature of the corona far from the Sun's surface? -
Answers Suns magnetism
The number of sunspots and solar activity in general peaks - Answers Every 11 years
The "solar neutrino problem" refers to the fact that astronomers - Answers detect only one-third the
number of neutrinos expected by theory
Stellar Parallax is the measure - Answers Of distance
The angle of stellar parallax for a star gets larger as the - Answers Length of baseline increases
You can best model the size and distance relationship of our Sun & the next nearest star using - Answers
Two golf balls 100 km apart
, A star's proper motion is its - Answers annual apparent motion across the sky.
In the stellar magnitude system invented by Hipparchus, a smaller magnitude indicates a _____ star. -
Answers Brighter
A star's apparent magnitude is a number used to describe how our eyes measure its - Answers
Brightness
The absolute magnitude of a star is its brightness as seen from a distance of - Answers 10 parcecs
Which of the following quantities do you need in order to calculate a star's luminosity? - Answers
Apparent magnitude and distance
What are the two most important intrinsic properties for classifying stars? - Answers Luminosity and
surface temperature
Wien's law tells us that the hotter an object, the _____ the peak wavelength of its emitted light. -
Answers Shorter
We estimate the surface temperature of a star by using - Answers a) its color.
b) the pattern of absorption lines in its spectrum.
c) Wien's law.
d) differences in brightness as measured through red and blue filters.
Which spectral classification type corresponds to a star like the Sun? - Answers G
The key difference between the spectra of B stars and G stars is - Answers B stars show strong hydrogen
lines; G stars weaker hydrogen lines.
Astronomers can estimate the size of a star using - Answers a) apparent brightness.
b) direct observation of diameter.
c) temperature.
d) distance to the star.
Eclipsing binary stars are very useful for determining the - Answers Masses of stars
What is the single most important characteristic in determining the course of a star's evolution? -
Answers Mass
A star will spend most of its "shining" lifetime - Answers As a main sequence star
As stars evolve during their main-sequence lifetime - Answers They don't change their spectral type
Average solar temperature - Answers Effective temperature
Where sun emits radiation - Answers Photosphere
Suns lower atmosphere - Answers Chromosphere
Region on top of photosphere where temp raises dramatically - Answers Tradition zone
Thin upper layer hot atmosphere - Answers Corona
What does corona turn into - Answers Solar wind
Region where the material of the sun is in constant convective motion - Answers Convection zone
Zone under convection where solar energy is transported towards surface - Answers Radiation zones
Amount of solar energy reaching this surface each second is a quantity - Answers Solar constant
What is it called when a Stars pressure outward pushed exactly counteracts gravity inward pull -
Answers Hydrostatic equilibrium
What is the study of solar surface patterns - Answers Helioseismoly
What are regions of bright and dark gas - Answers Granules
Where does visible light come from in the star - Answers Photosphere
Who's planets density is most like the sun - Answers Jupiter
The sun is a stable star because - Answers Gravity balances Forces from pressure
How long does it take for a photon to escape - Answers A million years
What is probably responsible for the increase in temperature of the corona far from the Sun's surface? -
Answers Suns magnetism
The number of sunspots and solar activity in general peaks - Answers Every 11 years
The "solar neutrino problem" refers to the fact that astronomers - Answers detect only one-third the
number of neutrinos expected by theory
Stellar Parallax is the measure - Answers Of distance
The angle of stellar parallax for a star gets larger as the - Answers Length of baseline increases
You can best model the size and distance relationship of our Sun & the next nearest star using - Answers
Two golf balls 100 km apart
, A star's proper motion is its - Answers annual apparent motion across the sky.
In the stellar magnitude system invented by Hipparchus, a smaller magnitude indicates a _____ star. -
Answers Brighter
A star's apparent magnitude is a number used to describe how our eyes measure its - Answers
Brightness
The absolute magnitude of a star is its brightness as seen from a distance of - Answers 10 parcecs
Which of the following quantities do you need in order to calculate a star's luminosity? - Answers
Apparent magnitude and distance
What are the two most important intrinsic properties for classifying stars? - Answers Luminosity and
surface temperature
Wien's law tells us that the hotter an object, the _____ the peak wavelength of its emitted light. -
Answers Shorter
We estimate the surface temperature of a star by using - Answers a) its color.
b) the pattern of absorption lines in its spectrum.
c) Wien's law.
d) differences in brightness as measured through red and blue filters.
Which spectral classification type corresponds to a star like the Sun? - Answers G
The key difference between the spectra of B stars and G stars is - Answers B stars show strong hydrogen
lines; G stars weaker hydrogen lines.
Astronomers can estimate the size of a star using - Answers a) apparent brightness.
b) direct observation of diameter.
c) temperature.
d) distance to the star.
Eclipsing binary stars are very useful for determining the - Answers Masses of stars
What is the single most important characteristic in determining the course of a star's evolution? -
Answers Mass
A star will spend most of its "shining" lifetime - Answers As a main sequence star
As stars evolve during their main-sequence lifetime - Answers They don't change their spectral type
