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

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