ASTRONOMY EXAM 1
Newton's 1st Law
(Law of Inertia) an object in motion tends to stay in motion & an object at rest
stays at rest unless acted upon by an outside force.
Newtons second law
Force equals mass times acceleration
Newton's 3rd Law
For every action there is an equal and opposite reaction
Gravity strength on a surface
g=M1M2/d^2
In one month
Moon orbits once around earth
,Phases of the moon are caused by
the sun lighting up different fractions of the part of the moon we see from earth
Order of the moon phases
New - Waxing Crescent - First Quarter - Waxing Gibbous - Full - - Waning Gibbous -
Third Quarter - Waning Crescent - New (and repeat...)
When is the moon visible
only at night
highest at midnight
rises 6 hours prior
sets 6 hours after
When is the new moon visible
during the day, transits at noon and rises 6 hours earlier at sunrise, and sets 6
hours later at sunset
Positioning during a new moon (straight line)
sun moon earth
, Position of a full moon (straight line)
sun earth moon
Solar eclipse
the moon is blocking the suns light or a location on the earth surface is positioned
under the moons shadow
Solar eclipse positions
sun moon earth (new moon)
Lunar eclipse
earths shadow passes across the moon
Lunar eclipse positioning
sun earth moon (full moon)
Why do eclipses not occur every month
Newton's 1st Law
(Law of Inertia) an object in motion tends to stay in motion & an object at rest
stays at rest unless acted upon by an outside force.
Newtons second law
Force equals mass times acceleration
Newton's 3rd Law
For every action there is an equal and opposite reaction
Gravity strength on a surface
g=M1M2/d^2
In one month
Moon orbits once around earth
,Phases of the moon are caused by
the sun lighting up different fractions of the part of the moon we see from earth
Order of the moon phases
New - Waxing Crescent - First Quarter - Waxing Gibbous - Full - - Waning Gibbous -
Third Quarter - Waning Crescent - New (and repeat...)
When is the moon visible
only at night
highest at midnight
rises 6 hours prior
sets 6 hours after
When is the new moon visible
during the day, transits at noon and rises 6 hours earlier at sunrise, and sets 6
hours later at sunset
Positioning during a new moon (straight line)
sun moon earth
, Position of a full moon (straight line)
sun earth moon
Solar eclipse
the moon is blocking the suns light or a location on the earth surface is positioned
under the moons shadow
Solar eclipse positions
sun moon earth (new moon)
Lunar eclipse
earths shadow passes across the moon
Lunar eclipse positioning
sun earth moon (full moon)
Why do eclipses not occur every month
