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

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