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

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