Space Flashcards
(29 cards)
What is astronomy
The science of the universe beyond earths atmosphere
What is a celestial body
A naturally made object outside of earths atmosphere
What’s a star
A celestial body that has it’s own light and heat and is a mass of gas held together by gravity
What’s a planet
A celestial body that orbits a star
What does a planet require
A mass to form a round shape due to its own gravity and have a cleared region around its orbit
What is the order of the planets
Mercury Venus earths mars jupiter Saturn Uranus Neptune
What is something about Venus
Hottest planet
What’s a moon
A celestial body orbiting a planet it is a natural satellite
What is an aesteroid
A small rocky body orbiting the Sun
What are asteroids found
Between mars and Jupiter (asteroid belt)
What is a comet
A dusty snowball that orbits the Sun
How long does a comet typically orbit the Sun
Less than 200 years
What is a galaxy
A large system of stars held together by gravity
What galaxy are we in
The Milky Way
When was the Big Bang
Around 13.8 billion years ago
What gives us evidence of the Big Bang
Cosmic background radiation
What came after the Big Bang
Subatomic particles and expansion
How is gravity decided
If the mass is small the gravity is small if the mass is large the gravity is large
How is gravity calculated
Depending on the radius and mass of the body
How long does it take the earth to go around the Sun
365.25 days
How long does it take for the earth to spin on it’s own axis
24 hours
How are days a thing
At any time half the earth is facing the Sun so as it spins different half is facing the Sun
How are seasons caused
The earth is tilted at 23.5 degrees so when it tilts away it’s colder causing seasons
What are the phases of the moon
New, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, waning crescent
