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

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