Let's define it!
A chunk of ice and rock often with a tail and cloud of dust surrounding it
A comet
When the big bang occurred the temperature was hot/cold and the universe is now getting bigger/smaller
hot, bigger
During one orbit around the sun, the earth will rotate about how many times?
365.24
The fourth planet from the sun
Mars
A larger piece of space rock that usually orbit between Mars and Jupiter
An Asteroid
The first "stuff" created by the big bang were these two things
matter and anti-matter
When the Sun, Moon and Earth are aligned and the Moon blocks the Sun
Solar Eclipse (solförmörkelse)
The largest planet and the smallest planet
Jupiter and Mercury
A rock from space that has landed on Earth.
Meteorite
The first star was made out of what two elements?
Hydrogen and helium
The seasons are caused by
The earth's axis being tilted
The correct model of the solar system with the Sun at the center is called
The Heliocentric model
An exploding star that creates heavier elements
Supernova
The Big Bang took place how long ago?
13.8 billion years
Who helped find evidence that the Earth was NOT at the center of the solar system?
Galileo
Our solar system is in the Milky Way. What is the Milky Way?
A galaxy
The birthplace for a star: huge, cold clouds of gas and dust
Nebula
When everything in the Universe was compressed into a single point it was called a
Singularity
Why did Ancient Greek astronomers think that Earth was the center of the universe?
Simple observations (stars, and Sun moving across the sky) and Earth was created by God so it should be in the center.
How long ago did our sun form?
4.6 billion years ago