Early Astronomy
Define Astronomy
Astronomy is the science that studies the universe.
light requires matter to travel
what is false
Define Rotation.
Rotation is the turning, or spinning, of a body on its
axis.
What is astronomy?
what is the study of universe
What are photons
What is A small packet of light energy.
What is the heliocentric model?
In the heliocentric model, Earth and the other planets orbit the sun.
what type of light can be observed with the human eye?
what is visible
Define Perihelion?
What is the time in January when Earth is closest to the sun.
Stars are made up of ____________________ gas
what is hydrogen
Define reflection
What is when light bounces back from a surface.
Who was Nicolaus Copernicus?
What is Copernicus concluded that Earth is a planet.
why are there seasons?
what is Earth's tilt at 23.5 degrees
Define Revolution
What is Revolution is the motion of a body, such as a planet or moon, along a path around some point in space.
The length of a year is determined by the amount of time it takes
what is Earth to revolve around the Sun.
What happens when to much UV reaches earth?
What is can cause skin cancer
What is Universal Gravitation?
What is Gravitational force decreases with distance.
when did the first moon landing occur?
what is july 20,1969
Define Aphelion
What is the time in July when Earth is farthest
from the sun.
Define Milky Way galaxies
what is a group of stars, dust, and planets held together by gravity
What is 100-50+50+100-200+50
What is 50
What did Greeks use to explain Natural phenomena?
What is Rational arguments
solar eclipse occurs when the moon moves between the earth and the sun while lunar eclipses occur
what is moon passes through the earth's shadow
What are two main motions of Earth and two
minor motions.
What is Rotation,Revolution,Precession,Nutation
Kepler's third law say that
what is A planet moves more rapidly when near the Sun than when further away.
How can 8+8=4