The unit of measure, for measuring distance within our solar system
What is an astronomical unit (AU)?
100
An enormous hot ball of gas held together by gravity which produces energy through nuclear fusion reaction in its core
What is a star?
100
Our galaxy, the Milky Way, is this type of galaxy
What is a spiral galaxy?
100
Stars are made mostly of these two substances
What are Hydrogen and Helium?
100
These stars make up a majority of the stars in our Milky Way Galaxy
What are medium sized stars?
200
The sun and all the objects gravitational bound to it
What is the solar system?
200
The reaction created in stars when helium and hydrogen are combined
What is nuclear fusion?
200
an oval shaped galaxy
What is an elliptical galaxy?
200
A stars distance from us can be measured using this, and this was demonstrated when we held our thumbs out while moving them slowly closer to our faces while blinking our eyes
What is Parallax?
200
These stars have a shorter life span than medium sized stars and a diameter 10 to 100 times larger than medium sized stars
What are Giant stars?
300
The four planets make up the gas planets
What are Jupiter, Saturn, Uranus and Neptune?
300
The distance light travels in space in one year
What is a light year?
300
a scattered unorganized arrangement of stars, form this type of galaxy
What is an irregular galaxy?
300
The nearest star to our Earth, after the sun
What is Alpha Cenauri?
300
These stars have a short life span and a diameter greater than 1000 times that of our sun
What are super giants or super giant stars?
400
These four planets make up the terrestrial planets
What Mercury, Venus, Earth and Mars?
400
the total amount of light given off by a star
What is luminosity?
400
Unit of measure for objects outside of our solar system
What is a light year?
400
Stars are different in color due to these two factors
What are temperature and age?
400
These stars are about the size of Earth or smaller
What are White Dwarfs?
500
An object that orbits the sun, but is too small to be considered a planet
What is an asteroid?
500
The galaxy where our solar system exists
What is the Milky Way?
500
A red shift, indicating light waves that are expanded and objects are moving away from us, and a blue shift indicating waves are shorter and objects are approaching us
What is the Doppler Shift or Doppler Effect?
500
Stars are different from each other in these three ways
What are:
1. size
2. brightness
3. color
500
These stars are the smallest of all the stars, and have a diameter that is typically only about 16Km, They are very, very dense, and one teaspoon of their matter can have a mass of 100 million tons