Galaxies
What is a galaxy?
A collection of gas, dust, and billions of stars that are being held together by gravity
What is a asteroid, comet, and meteor?
Asteroid: A irregular shaped rock the orbit the sun
Comet: An icy body that releases gas or dust
Meteor: Blazing rock that entered the Earth's atmoshphere
What is the Big Bang?
A model that explains how the Universe began
What are constellations?
Set of stars with a recognized pattern in a region
What is an orbit?
A regular, repeating path that one object does around another object.
What do people use to describe the distance of a galaxy?
What's the most common type of asteroid?
C-type asteroids
What were the two starting eras of the expansion of the Universe?
Radiation and Matter era
What are the two hemispheres divided by?
What type of orbit do planets take?
Elliptical orbit
The Local Group
Where do comets reside in?
What were the first two elements to ever exist?
Hydrogen and Helium
What is a celestial sphere?
A imaginary sphere when the constellations are found
What's the role of gravity in our solar system?
It holds the solar system together and governs the movement of objects in the solar system.
What arm is the Milky Way in?
How will you differentiate meteoroid, meteor, and meteorite?
Meteoroids: Boulders of rocks in space.
Meteors: Blazing rocks that are actual meteoroids that enter the Earth’s atmosphere.
Meteorites: Remnants of meteoroids that are able to reach the Earth’s surface.
What epoch had only energy and the superforce?
The Planck epoch
What is a true horizon?
The line that visually divides the Earth and the sky.
What keeps the planet moving in elliptical orbits?
The sun's gravitational force, along with the planet's inertia.
What are the two galaxies closest to the Milky Way?
The Large Magellanic Cloud and the Small Magellanic Cloud
What are near-Earth objects?
They are objects that move around in outer space.Like as asteroids, comets, and meteors
What are all the epochs called?
Planck, Grand Unification, Inflationary, Electroweak, Quark, Hadron, Lepton, Nuclear, Atomic, Galactic, and Stellar.
Which side of the of the celstial sphere would someone see if they were standing on the equator?
Both north and south
How will you differentiate rotation from revolution?
Rotation is the spinning of an object on its own axis, while revolution is the movement of an object around an orbit.