Celestial Bodys Flashcards
What is the universe ?
Everything that exists
What is astronomy ?
The science that deals with the universe beyond the earth’s atmosphere
What is a celestial body?
A naturally made object outside the earth’s atmosphere
What is a satellite ?
A satellite is an object orbiting a celestial body of large mass.
What is a star ?
Celestial body that generates its own light and heat and consists of a mass of gas held together by its own gravity
What is a planet ?
A planet is a celestial body that is in orbit around a star
What must planet have/do to be a planet ?
Must orbit a star
must have enough mass to forms its own shape
have cleared the region around its orbit of other celestial bodies
What is the moon ?
A natural satellite of a planet
What is an asteroid ?
A small rocky body in space
What a comet ?
A dusty snowball that orbits a star
What is a meteor ?
A solid object from outer space that enters the earth’s atmosphere
What is the solar system ?
A solar system is group of planets , comets , asteroids , and other celestial bodies that re in orbit around a star.
What are the model of the universe ?
Geocentric , heliocentric
What is the new and right model of the universe ?
Heliocentric
What is the old and wrong model of the universe ?
Geocentric
What is a galaxy ?
A large system of stars held together by their own gravity e.g.)the Milky Way
What are the 6 celestial bodies ?
Star , moon , planets , comet , meteor , asteroid
Name all the planets and the rhyme
My Very Educated Mother Just Served Us Noodles
Mercury, venus , earth , mars , Jupiter , Saturn , Uranus , Neptune
Where are asteroids found?
In the asteroid belt between mars and Jupiter
Where are comets found ?
Comets are found in the Kuiper Belt which is away from the solar system
What is the Big Bang formation ?
Before the Big Bang , 14 billion years ago, the entire universe was smaller than a pinheaded. It was extremely hot and dense. It then exploded creating time , space and matter. The universe expanded.
What evidence is there to back up the Big Bang theory ?
An energy called ‘cosmic background radiation’ was discovered.
Edwin Hubble and vesto slipher discovered that the universe is expanding
