Intro to Astronomy
A time about 3.7 billion years ago when a sudden event sent all matter and energy in an outward expansion
What is the Big Bang
The event that occurs when our view of the Sun is blocked by the moon
What is a solar eclipse
How long it takes for the Earth to complete one revolution around the Sun
What is 365 days
The movement that is responsible for day and night
What is the Earth's rotation
The theory of how the solar system formed
What is Nebular Theory
How the Suns energy is produced
What is nuclear fusion
Factor that has the biggest impact on Earth's seasons
The structure of our solar system with the Sun located at the center and the planets revolving around it
What is heliocentric
A term that is larger than a galaxy. Ours includes 54 galaxies
The type of rays that are blocked by our atmosphere
What is X-rays or gamma or some UV rays
The shortest day of the year
What is the winter solstice
The point where two celestial objects with different masses balance.
What is barycenter?
The man who discovered redshift
Who is Edwin Hubble
The time when the combined force of the sun & moons gravity make a tide with the most intense high & low tide.
What is spring tide
On the following image the letters on the Earth are experiencing summer
What are C and D
The Earth's rotation axis is not fixed in space. Like a rotating toy top, the direction of the rotation slowly wobbles over a period of 26,000 years. This is called Earth's
What is precession?
The difference between meteors and meterorites
What is meteors burn up in the atmosphere and meteorites come in contact with the Earth's surface
If you wanted to make all days on Earth the same length you would have to
What is keep the Earth from tilting on its axis?
The apparent backwards movement of some planets that could not be explained in the geocentric model of the solar system
What is retrograde motion