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During May, June and July, the northern hemisphere is exposed to more direct sunlight because the hemisphere faces the sun. The same is true of the southern hemisphere in November, December and January. It is the tilt of the Earth that causes the Sun to be higher in the sky during the summer months which increases the solar flux. However, due to seasonal lag, June, July and August are the hottest months in the northern hemisphere and December, January and February are the hottest months in the southern hemisphere.
So ATS I ask you, what "fun" facts per say would you tell someone that is new to the Astronomy/Space Exploration topics to better help them understand the grand picture or physics of space and even our own Earth?
Originally posted by jeenyus2008
Im always amazed at how much math/algorithms are involved in helping us determine things of unknown certainty (ie. Drake equation). apart from 'Tidal Locking" what other kinds of Locking relations do moons have to their planetary body?
Originally posted by Illustronic
David, would Mercury's 3:2 spin-orbit resonance with the sun be a round enough ratio out of chaos for you? Mercury rotates three times on its axis for every two orbits around the sun. The stability of this equilibrium state is well established. A year on Mercury is a day and a half on Mercury. Nature.
Maybe I don't quite understand what you are saying.
Draw a circle, measure the perimeter to be 13 units in circumference. draw a perfect five pointed pentagram in that circle with each point touching the circle. using the same unit to measure the circle, the arms will then measure 12.364, the number of full moons in a year. An even more accurate way of doing this is to draw the second Pythagorean triangle, which just happens to be made of numerals 5, 12, and 13 again, interestingly also the numbers of the keyboard, and of Venus (page 26). Dividing the 5 side into its harmonic 2:3 gives a new length 12.369, the number of full moons in a year.
the moon seems to beckon to look further. we all know that six circles fit around one on a flat surface (giving the number six and seven). twelve spheres pack perfectly around one in our familiar three-dimensional space (our familiar 12 and 13). We seem to be moving up in sixes [when gaining a dimension]. Could eighteen time-spheres fit round one in a fourth dimension of time to give the numbers 18 & 19? incredibly, all of the current major time cycles of the sun-moon-earth system can be expressed as simple combinations of the numbers 18,.19, and the Golden Section.
the golden section is evident in the pentagram, the icosohedron, the dodecahedron, and all living things. the orvits of the four inner planets all display its presense. its values added to the magic number 18 produce 18, 18.618, 19, 19.618 and 20.618, which then multiply together as shown opposite. coincidence or biophysics?
18 years = the saros eclipse cycle
18.618 years = revolution of the moon nodes
19 years = the metonic cycle (if there is a full moon on your birthday this year, there will be another one on your birthday in 19 years.)
The time it takes for the sun to return to the same one of the moons nodes = "eclipse years" = 18.618 x 18.618 which is 18.618 days short of a solar year. there are 19 eclipse years in a saros.
12 full moons (lunar year) = 18.618 x 19 days
Our solar year = 18.618 x 19.618 days
13 full moons = 18.618 x 20.618 days. 13 full moons is another 18.619 days afoter the solar year.