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40 Cards in this Set

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  • Back
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What is nebulae?
Nebulae is huge clouds of dust and gas from which new stars born.
What are three types of galaxies?
- Spiral Galaxy
- Elliptical Galaxy
- Irregular Galaxy
Our sun is in the spiral-shaped Milky way galaxy
Where are many stars are found in?
In Multiple-star system
True or False:
Every Distant galaxy show a red shift, indicating that the universe is expanding.
True
What do most astronomers agree?
That the universe began with the big bang
True or False:
Stars range in size from tiny neutron stars to huge super gaint stars.
False
Stars range in size from huge super gaint stars to tiny neutron stars.
What determines by the star's color?
Surface temperature.
What are most stars are made of?
Hydrogen and helium gases.
True or false:
A star's brightness as observed from earth is its apparent magnitude. A star's true brightness is its abosolute magnitude.
True
True or False:
The hertzprung- Russell diagram shows the relationship between a star's absolute magnitude and it's temperature.
True
What are the layers of the sun?
- Corona
- Chromosphere
- photosphere
- core
What is the main factor that affects the evolution of a star?
Is it's starting mass
What are binary stars?
Two stars that revolve each other.

Binary - Two
What is constellation?
Constellation is group of stars.
What is nova?
when one star in binary stars gives out gases to other and when the stars explode.
What is nebulae?
New stars are being born inside a brightly glowing cloud of dust and gas.
What is an example of spiral galaxies?
Milky Way
What are spiral galaxies?
galaxies that are shaped like spirals.

Milky way is an example of Spiral Galaxy.
What are elliptical galaxy?
Galaxies that are shaped nearly spherical to a flat disk.
What are irregular galaxies?
Galaxies that don't have any certain kind of shapes.
What is a spectroscope?
A spectroscope can breaks up the visible light from a distant star into it's characteristics colors.
What is a spectrum?
When white light passes through a prism, a band of light called a spectrum is formed.
What is red shift?
The spectrum of a star moving away from the earth appears to be shifted slightly toward the red end.
What is doppler effect?
The apparent change in the wavelenghts of light that occurs when an object is moving toward or away from the earth is called doppler effect.
What is big bang theory?
The big bang theory may explain how the universe formed.
What is gravity?
The force of gravity began to affect the matter racing outward in every direction.
What is quasar?
-Gives of radio waves.
-Very high energy.
What is apparent magnitude?
The brightness of a star depends on its size, its surface temperature, and its distance from earth.
What is the life cycle of a high mass star?
-Nebula
-Protostar
-Main sequence
-Gaint star
-white dwarf
-black dwarf
What is the life cycle of higher mass star?
-Nebula
-Protostar
-Main sequence
-Supergiant star
-Super nova
-Neutron star
-Black hole
What is absolute magnitude?
The amount of light a star actually gives off is called absolute magnitude.
What is parallax?
Parallax refers to the apparent change in the position of a star in the sky.

Measuring distance.
What is nuclear fusion?
Gravity pulls together the atoms of hydrogen gas in the core so tightly that they become fused together. This process is called nuclear fusion.
What is the line through the center of the sun is called?
Axis
Name four stroms that occur in the sun?
-Sunspot
-Solar winds
-Solar flares
-Prominence
What is the center of the sun?
core
What is the first layer of the sun?
Corona
What is the second layer of the sun?
Chromosphere
What is the third layer of the sun?
Photosphere
What is pulsar?
Neutron stars that give off pulses of radio waves are called pulsars.