Early Astronomers
This is the object which Copernicus realized was at the center of the solar system.
What is the Sun?
This is the chemical symbol for fluorine.
What is F?
All stars began as this.
What is a nebula?
The sixth planet from the sun
What is Saturn?
What is sodium?
This astronomer is famous for discovering serveral moons of Jupiter.
Who was Galilei?
The number of neutrons in Iron-57.
What is 31?
This is when a massive star explodes.
What is a supernova?
The outermost layer of the sun
What is the corona?
This is the theory that the universe will one day collapse.
What is the Big Crunch?
Aristotle concluded that the Earth was round because of this fact.
What is that the Earth's shadow on the moon is always curved?
The number of electrons in Se2-.
What is 36?
The size of a star is determined by the balance between these two opposing forces.
What are gas pressure (pushing outward) and gravity (pushing inward)?
The group of planets that are larger in size and have a thick atmosphere
What are gas giants?
In a class activity, dots on this object represented objects in the universe after the Big Bang.
What is a balloon?
Who is Kepler?
This is the term for atoms that have the same number of protons but different number of neutrons.
What is an isotope?
This is the first stage of a star at which nuclear fusion occurs.
What is main sequence?
The distance in AU that a planet orbits if its orbital period is 0.616 years.
What is 0.72 AU?
If a star is located 400 light years away, then this is the number of days required for that star's light to reach the earth.
What is 146,000 days?
This is the viewpoint that the Earth is the center of the universe.
What is geocentric?
This is the average atomic mass of chlorine, given that Cl-35 has an abundance of 75.8% and Cl-37 has an abundance of 24.2%.
What is 35.48 amu?
This stage is unique to medium mass stars.
What is the planetary nebula?
The number of days it takes for a comet to make it one quarter of the way through its orbit, if it orbits at a distance of 4 AU from the Sun.
What is 730 days?
What is the chromosphere?