Stars
The Sun
Evolution of Stars
Galaxies
The Universe and Doppler Shift
100
What is the North Star also called?
Polaris
100
Put these layers of the Sun in order from innermost to outermost: radiation zone, core, convection zone
Core, radiation zone, convection zone
100
Compared to main sequences star of equal brightness, are white dwarfs unusually hot or cool?
hot
100
What is the name of our galaxy?
The Milky Way
100
A light source that is approaching an observer will have its light waves...
compressed
200
Which is largely based on how far away a star is, absolute magnitude or apparent magnitude?
apparent magnitude
200
What are darker, cooler areas on the Sun's surface called?
sunspots
200
About what percentage of stars on on the main sequence?
90%
200
Which type of galaxy is egg-shaped?
elliptical
200
Which model of the universe says that the universe expands and contracts in cycles?
The oscillating model
300
Complete: Parallax can be used to measure the distance to stars unless they are very...
far away
300
What phenomenon is associated with both sunspots and prominences?
Intense magnetic fields
300
What two elements are most often involved in nuclear fusion?
hydrogen and helium
300
About how many stars does our galaxy contain?
1 trillion
300
What motion causes redshift of light?
receding
400
What time of year are circumpolar constellations visible?
All year
400
What specific particles are are CMEs made of?
Protons and electrons
400
Complete: Neutron stars are very small and have extremely high...
density
400
What type of black hole is at the center of our galaxy?
A supermassive black hole
400
Which theory of the origin of the universe is the most accepted?
The Big Bang Theory
500
What are two things a star's spectrum can tell us about the star?
Its temperature and its atmospheric composistion
500
What is the second-closest star to Earth?
Proxima Centauri
500
Which type of star spends more time on the main sequence, high-mass or low-mass?
low-mass
500
What two small galaxies orbit our galaxy?
The Clouds of Magellan
500
In what manner is the size of the universe currently changing?
Its expanding
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