Ch 4 Stars, Galaxies, and the Universe

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Can you name the Ch 4 Stars, Galaxies, and the Universe Key Terms?

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DefinitionTerm
Explosion that created our universe
Huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
Do supernovas form from high mass stars or low mass stars?
The apparent change in position of an object when you look at it from different places.
The diagonal area of stars on the Hertzsprung-Russell diagram
An object with gravity so strong that nothing, not even light, can escape
Brightess as seen from the same distance (actual brightness)
Group of two or more stars
True or false: The universe is about 13.7 billion years old.
A protostar becomes a star when _________ begins.
The blue-white core of a star that is left behind and cools becomes a ________.
Which stars live longer lives: high mass stars or low mass stars?
The galaxy that our solar system is located in
The distance that light travels in one year
Type of galaxy that does not have a regular shape
Type of star cluster that is tightly packed with over a million stars
Type of star cluster that is loosely packed with only a few thousand stars
Does a planetary nebula form from high mass stars or low mass stars?
How long a star lives depends on its _______.
If a star is red, is it hot or cool?
Type of galaxy with a bulge in the middle and arms that spiral outward
If a star is blue, is it hot or cool?
DefinitionTerm
Large cloud of gas and dust that formed our solar system
Type of galaxy that is shaped like a stretched out ball
Leftover thermal (heat) energy from the big bang
Do neutron stars form from high mass stars or low mass stars?
Matter that does not give off electromagnetic radiation
Large cloud of gas and dust from which stars form
Do white dwarves form from high mass stars or low mass stars?
The explosion of a supergiant
True or false: Our sun is a medium-sized star.
Small asteroid-like and comet-like bodies that collided to form the planets
Do black holes form from high mass stars or low mass stars?
Do red giants form from high mass stars or low mass stars?
A contracting cloud of gas and dust with enough mass to form a star
The brightness of a star depends upon both its size and ___________.
Do supergiants form from high mass stars or low mass stars?
Brightness as seen from Earth
Unknown force that is causing the universe to expand
Astronomer who stated that the farther away a galaxy is, the faster it is moving away from us (last name only)
Scientific notation uses powers of this number to write very large or very small numbers
When the dim star blocks light from the bright star in a binary star
Star systems that have two stars
Very large groupings of stars

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