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

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