Early Astronomers
For years, people believed that _________ was the center of the universe
Earth
what causes day and night?
the rotation of earth
what season does the northern hemisphere experience when it is tilted away from the sun?
winter
what kind of eclipse is possible during a full moon?
lunar
what term refers to the decreasing amount of sunlit surface
waning
Who stated that the sun was the center of the universe?
Nicolaus Copernicus
Earth is tilted at an angel of ________degrees
23.5
The southern hemisphere is having ________ when earth is tilted towards the sun
summer
what three things have to be alligned for an eclipse to take place?
sun, earth, and moon
what term refers to a moon that is almost fully illuminated by the sun
Gibbous
What term is used to define the earth as center of the solar system
geocentric model
How long does it take Earth to complete one full rotation?
24 hours
during the summer months there are ______ hours of sunlight for the northern hemisphere b/c it is tilted _______ the sun.
more/toward
what type of eclipse causes the sun's light to be blocked by the earth?
lunar
what term refers to the increasing amount of the sunlit portion of the moon's surface
waxing
Which astronomer proved the sun was the center of the solar system
Galileo
Earth rotation gives the illusion the the sun rises in the ______ and sets in the ____________
east/west
there are more hours of sunloight during the summer months. B/C of this, the sun rises __________ and sets __________.
earlier/later
what kind of eclipse takes place when the moon is positioned between the earth and the sun
solar
how long does it take for the moon to revolve around earth
28 days
What model of the universe showed the earth and the other 5 naked-eye planets orbiting the sun
heliocentric model
The force of the ___________ gravitational pull hold all objects in the solar system
sun's
seasons are caused by earth's _________ and __________ around the sun
tilt/revolution
a solar eclipse takes place during what moon phase?
new moon
the moon appears half lit during which 2 portions of the lunar cycle?
last quarter and first quarter