Planets
What is the hottest planet?
venus
What is the name of the theory that suggests the universe is expanding?
Hubbles Law
Earth revolves around what?
the sun
What galaxy do we live in?
Milky way
What is the theory that describes the formation of the solar system, including the Earth?
The nebular hypothesis describes the formation of the solar system, including the Earth
What outer planet is closest to the sun?
Jupiter
What is the name of the force that is believed to be driving the accelerated expansion of the universe?
Dark Energy
Earth ____on it's axis?
rotates
What is in the milky way galaxy?
Dust, gases, and the solar system
What has a tail and orbits the sun?
A comet
What is the third planet from the sun?
Earth
What is another name for our planetary system?
Solar System
It takes the earth ___to rotate.
24 hours
What are the three galaxies?
spiral, irregular, elliptical
What were the main contributions of Copernicus and Galileo?
That the sun was at the center of our solar system.
List the planets from the closest to the sun to the furthest.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What is found at the center of our galaxy?
A supermassive black hole
The earth revolving around the sun causes what?
the seasons
What is the difference between a galaxy and the solar system?
a galaxy is a massive collection of stars, gas, and dust, while a solar system is a much smaller system centered around a single star (our Sun) and the objects that orbit it.
Where is Earth found in our galaxy?
Along the spiral arms
What force causes clouds of gas and dust to contract in space to form stars?
Gravity
The study of the origin, evolution, structure, and ultimate fate of the entire universe. I
Cosmology
How long does it take Earth to revolve around the sun?
365 days or 1 year
What two subclasses are disklike galaxies with spiral arms divided into?
Barred and normal spirals
What are the two main ways the universe could continue to evolve in the future:
it could continue to expand or the big crunch where the attractive force of gravity eventually overcomes the repulsive force of dark energy, causing the universe to stop expanding and begin to contract.