This type of galaxy has a large nucleus with an oval shape cloud of stars surrounding it (largest and most common type of galaxy)
Elliptical
200
An HR diagram graphs the relationship between temperature and __________?
Star brightness (or absolute magnitude)
200
The Sun is this type/category of star
Main Sequence
200
Which type of star is hotter...White Dwarfs or Red Giants?
White Dwarfs
200
What evidence do scientists have for the big bang theory? hint, the color of galaxies looks different because they are moving away...
Redshift
200
This type of galaxy has no definite shape (comes in a variety of shapes and sizes)
Irregular
300
What is luminosity?
Brightness, or absolute magnitude
300
(True or False) When the Sun dies, it will leave behind a black hole
False
300
Way to measure a star's distance from Earth by looking at its apparent shift in position when viewed from 2 different locations.
Parallax
300
This theory of the origin of the Universe says that all the matter and energy in the Universe was distributed in a huge, rapid expansion/explosion
Big Bang Theory
300
This type of galaxy has a large nucleus with two or more curved arms rotating around it (average in abundance and size)
Spiral
400
How is color related to temperature?
Star color depends on temperature. Hot stars are blue or white, cooler temperature stars are orange and red.
400
Deep in the Sun's core, this process forces Hydrogen atoms to smash together so violently, they actually form Helium atoms, and release massive amounts of energy.
Nuclear Fusion
400
Most stars (according to the HR diagram) fall into this type/category
Main Sequence
400
Based on current data/observations, is the Universe expanding, contracting, or not moving at all
Expanding
400
What type of galaxy is the Milky Way (the galaxy our solar system is in)?
Spiral Galaxy
500
How is absolute magnitude different from apparent magnitude?
Absolute magnitude is the actual brightness (at a given distance).
Apparent magnitude is how stars look from Earth.
500
The outermost layer/atmosphere of the Sun. This is seen during a solar eclipse.
The Corona
500
Gasses and dust held together by gravity;the birthplace of a star
Nebula
500
Based on data/observations, and according to the Big Bang Theory. Scientists estimate the age of the Universe to be roughly...
12 to 15 billion years old
500
What are galaxies made of?
Stars, gas, and dust ... and yes, plenty of hydrogen & helium!