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Absolute brightness how bright a star is from a standard distance
Apparent brightness how bright a star appears compared with other stars when all are viewed from earth
Axis an imaginary line through the center of an object that is a fixed point of reference
Constellation a group of stars that forms a recognizable pattern in the sky
Galaxy a collection of stars, their solar systems, dust and gas
Gravity a force that pulls objects toward each other
Light-year the distance that light travels in one Earth year
Lunar eclipse an event during which the moon passes directly behind Earth and into its shadow
Moon phase a stage in the repeating, predictable pattern of change in the moon's appearance from Earth
Orbit the oval-shaped path an object follows as it revolves around another object in space
Solar eclipse an event during which the moon's shadow blocks all or some of the sun's light from reaching Earth
Solar system a system of objects in space that includes at least one star, planets, their moons, asteroids, comets, and other space debris
Star a space object that gives off its own heat and light
Universe all of the existing matter and energy in space
Biggest difference between Galileo's work and the previous scientist? Galileo was one of the first scientists to rely heavily on the scientific method rather than abstract theory
Why did the Catholic Church put Galileo under house arrest? For saying the planets revolved around the sun
How does Aristotle's model of the solar system compare to Copernicus's model? Aristotle thought the sun revolved around the earth
According to Copernicus, the rising and setting of the sun is due to... Earth's rotation
Kepler's contribution to our understanding of planetary orbits? An oval
Age of the solar system 4.5 billion years
Force pulls the solar system together out of a cloud of dust and gas? Gravity
How is Venus different from Jupiter? Jupiter is a gas giant and Venus is a terrestrial planet
In terms of orbit, the Earth is to the sun as what is to the Earth? The moon
What force keeps the arms of the Milky Way spinning around its center? Gravity
The choice that best depicts the shape of the Milky Way It's spiral
Why is our galaxy called the Milky Way? Because it looks hazy and milk from Earth
Describe the process of nuclear Fusion, as it occurs inside our sun... Hydrogen atoms combine to make helium atoms
What effect does gravity have on stars? It forms stars from clouds of gas and dust, and causes them to ignite.
Why does the moon appear to shine? Because it reflects sunlight
If you wanted to find iron and sulfur on the moon, where would you look? Inside the moon's core
What is the moon mostly made out of? Igneous rock
Before the Renaissance in Western Europe, what model of the universe did most believe the geocentric
What was at the center of the Geocentric model? the earth
Name 3 main people/groups that believed in Geocentric? Ptolemy, the church, and Airstotle
During the Renaissance, who was the first person to question the Geocentric model? Copernicus
What new model did Copernicus come up with? Heliocentric
What was the center of the Heliocentric model? Sun
What did Galileo do to make people believe this model? He wrote The Starry Messenger
Was he successful changing the new model? No, they put him in prison and banned his books
What model do we know is correct today Heliocentric
Four inner planets Mercury, Venus, Earth, Mars
Four outer planets Jupiter, Saturn, Uranus, Neptune
What star is closest to the earth Sun
What size star is it? Medium
How old is the sun? 4.5 billion years
What stage is the sun in it's life cycle now? Middle Life
When this size star dies (medium) what size will it be? White Dwarf
Describe patterns of constellations throughout the year. A constellation stays - goes - comes back
Describe one constellation that is visible in the night sky currently where we live. It has a belt and shoulders
What type of galaxy is the Milky Way? Large and spiral
Where in the galaxy is our solar system located? In one of Orions arms
What is some evidence that the Earth rotates? It has seasons. The Sun rises and sets, stars and moon move across the sky.
What is some evidence the Earth revolves around the sun? We see different parts of the night sky.
What makes the Earth have different seasons? Earth is tilted on it's axis.
What happens when the Earth and moon line up just right to form shadows on each other from the sun's light? We have a solar eclipse
Be able to draw a LUNAR eclipse moon - Earth - sun
Be able to draw a SOLAR eclipse Earth - moon - sun
How does this show that Earth is a sphere? It casts a round shadow on the moon during a solar eclipse.
When the moon is between the sun and Earth, we can not see the side of the moon that is reflecting the sun's light. Moon phase is..... NEW moon
When the Earth is between the sun and the moon, we can see the ENTIRE side of the moon that is reflecting the sun's light. Moon phase... FULL moon
Moon phases gradually becoming MORE visible on Earth showing MORE area reflected sunlight on the moon's surface is called.... waxing
Moon phases gradually becoming LESS visible on Earth showing less reflected sunlight on a moon's surface is called.... waning
How do the planets stay in orbit around the sun? The speed of the planets motion
Explain how gravity causes the high and low tides The other side ocean water bulges outward. It creates a high tide.
Reasons why the telescope is important.... 1. Shows details like craters and mountains 2. Shows you planets you can't see with the naked eye 3. Shows stars 4. Helped Galileo prove that the sun is the center of the universe
Created by: fwb