Milankovitch Cycles
The Milankovitch Cycles described this naturally occurring phenomenon.
What are Ice Ages?
This is how far the Moon moves each 24 hour period.
What is 13 degrees?
This is the difference in sunrise time each successive day.
What is Four Minutes
These are the only lunar phases in which an eclipse can occur.
What are New and Full Moon
This is the shape of the Moon's directly sunlit portion as viewed from Earth.
What are Lunar Phases?
This is the season in which the Northern Hemisphere is closest to the Sun.
What is Winter?
This is how much the Moonrise changes each night.
What is 52 minutes?
This is an ancient device for determining time during the day.
What is a Sun Dial
This is the eclipse that sometimes appears red due to refracting light from Earth's atmosphere.
What is a Lunar Eclipse
This is the time required for the Moon to pass through its complete series of phases from new moon to new moon; this takes 29.5 days
What is Synodic Month
This cycle, when at a minimum, is the reason why the Sun's solar radiation is evenly distributed.
What is Axial Tilt?
This is the length of the eclipse season.
What is 34 1/2 days
This is the term used to describe accurate time
What is o'clock
This is the darkest part of an eclipse
What is Umbra
This is the hiding of a celestial body when another celestial body passes in front of it.
Occultation
This is the cycle change that causes an increase of solar energy of 20 to 30% at aphelion.
What is Eccentricity
This is what it is called when the moon turns 360 degrees.
What is Sidereal Month?
This describes the apparent path of the sun
What is the Ecliptic
The location that the Moon passes the ecliptic and allows for the possibility of eclipses
Lunar Nodes
This is the event that occurs when two or more celestial objects appear close together in the sky.
What is Conjunction
This is the wobble that causes the North Star to change over time.
What is Precession?
This is where you can see a full Earth occur.
What is the Moon
This is the Sun's path over the course of a year
What is the Analemma
This type of eclipse occurs when the sun is in apogee.
Annular Eclipse
This is the apparent shift, in relation to the fixed stars, of the celestial poles caused by a gradual wobble of the Earth's axis that takes about 26,000 years to complete. Caused by the gravitational influence of the Sun and the Moon acting on Earth's equatorial bulge.
What is Axial Precession