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1. Earth-Moon distance From Earth Center (EC) to Moon in km : Moon is a natural satellite of earth. For any satellite, to predict its instantaneous distance
from earth requires its ephemeris data which indicates the satellite's orbital parameters
known as Keplerian elements. The ephemeris data acquired on a particular day, called
epoch, is applied as input to satellite tracking software for accurate predictions of satellite
position in next few days. Thereafter a new set of Keplerian elements are acquired. The computed values of Distances from Earth Centre (EC) to Moon in km at Epoch (UT year
= 2014, month = 5, day = 23, hr = 3, min = 59, sec = 20.61457) and at four other specific
instances of Year = 2013 while Moon was at apogee, perigee and crossing over earth
equator at ascending & descending nodes were as follows : GMT Time (Y M D h m s) - - -Moon Position (instance) - - - - Earth-Moon Distance (km)
2014:05:23:03:59:20 - - - - - - Epoch - - - - - - - - - - - - - - - - - - - 368644.28
2014:06:02:18:36:48 - - - - - - Apogee - - - - - - - - - - - - - - - - - -402802.27
2014:06:06:10:09:59 - - - - - - Earth Equator - - - - - - - - - - - - - 396714.18
2014:06:16:10:28:23 - - - - - - Perigee - - - - - - - - - - - - - -- - - - -363564.67
2014:06:19:11:12:09 - - - - - - Earth Equator - - - - - - - - - - - - - 368681.22
2014:06:30:02:19:58 - - - - - - Apogee - - - - - - - - - - - - - - - - - - 402802.04
2014:07:03:17:53:08 - - - - - - Earth Equator - - - - - - - - - - - - - 396808.49
2014:07:13:18:11:34 - - - - - - Perigee - - - - - - - - - - - - - - - - - - 363565.04
2014:07:16:18:55:18 - - - - - - Earth Equator - - - - - - - - - - - - - 368586.79 It is clear as how much the distance of Moon from Earth Centre vary. Since epoch the
minimum distance was 363564.67 km and the maximum distance was 402802.27 km.
2. Earth-Sun distance From Earth Centre to Sun Centre (EC to ES) in km : Earth Revolves around Sun in a counter clockwise direction. The earth's orbit around the
sun is not a circle, it is slightly elliptical. Therefore, the distance between Earth and Sun
varies throughout the year. To predict Earth-Sun distance any instant of time, we must
know the position of Earth and Sun at same instant on Celestial Sphere. For computing the position of Earth on celestial sphere at any instant, we first need to
compute position of Sun on celestial sphere. That provides many inputs required to
compute position of Earth at same instant on celestial sphere. The computed values of Distances from Earth Centre (EC) to Sun Centre (SC) in km at
Standard Epoch JD2000 and at six other specific instances of Year = 2013 while Earth was
at Perihelion, Vernal equinox, Summer solstice, Aphelion, Autumnal equinox, Winter solstice
were as follows :
GMT Time (Y M D h m s) - - -Earth Position (instance) - - - Earth-Sun Distance (km)
2000:01:01:12:00:00 - - - - - - Standard Epoch - - - - - - - - - - 147101196.66164
2013:01:03:09:11:56 - - - - - - Perihelion - - - - - - - - - - - - - - -147098790.67105
2013:03:20:11:02:09 - - - - - - Vernal equinox - - - - - - - - - - -148990030.62423
2013:06:21:05:01:19 - - - - - - Summer solstice - - - - - - - - - -152030553.38444
2013:07:05:00:18:52 - - - - - - Aphelion - - - - - - - - - - - - - - - - 152098441.95238
2013:09:22:20:45:38 - - - - - - Autumnal equinox - - - - - - - - 150128324.53014
2013:12:21:17:10:03 - - - - - - Winter solstice - - - - - - - - - - - 147162430.96729
It is clear that the distance of Earth Centre (EC) from Sun Centre (SC) vary throughout the
year. In the Year 2013 minimum distance was 147098790.67105 km and maximum
distance was 152098441.95238 km. Note : All these values are computed using the Orbital Mechanics - Model & Simulation
Software OM-MSS.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoThe average is always 12 hours a day.
Depending on latitude, locations in the Northern Hemisphere get between 12 and 24 hours of daylight per day in the middle of the year (March to September) , while the Southern Hemisphere gets less than 12 hours.
The situation is reversed from September to March (spring to fall in the Southern Hemisphere).
At the North Pole and South Pole, it is daylight for 6 months and night for 6 months.
Wiki User
∙ 9y ago2 feet
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When the Sun's rays strike earth directly at the equator what two seasons is it?
spring/fall
The earth is closest to the sun?
No. The planet closest to the Sun is Mercury.
Which third planet is closest to the sun?
Earth is the third closest planet to the sun.
What is called when earth is closest to the sun?
Perihelion is when the Earth is closest to the sun.
When is sun closest to equator?
in the northern hemisphere the sun is closest to earth in the dead of winter
Is fall after winter?
Because the earth is tilted, the sun goes around the earth but the earth stays still. So the sun hits the earth at a different point in each season which makes the seasons have a different weather.
Why do we have spring?
Earth orbits the Sun in a tilted-over position. Spring and Fall are the two seasons when Earth's tilt is halfway between forward to the Sun and rearward to the Sun.
Is it fall spring winter or summer when the earth is tilted away from the sun?
Winter!
what is the closest earth to the sun?
Earth is what even not closest to what not the Sun?
When there is no tilt of Earth's axis toward the sun the two seasons earth may be experiencing are?
fall or spring
When the Sun's rays strike earth directly at the equator what two seasons is it?
spring/fall
The earth is closest to the sun?
No. The planet closest to the Sun is Mercury.
Which is the closest distance of the earth from the sun?
it is about 92 million miles from the earth to the sun at its closest distance.
why is fall warmer than spring?
Because the earth's axis is tilted. ... It is all about the tilt of the Earth's axis. Many people believe that the temperature changes because the Earth is closer to the sun in summer and farther from the sun in winter. In fact, the Earth is farthest from the sun in July and is closest to the sun in January!
How many times does the sun orbits the earth in a year?
Only once, that is why we have winter, summer, spring, and fall
What object is the closest to the earth?
the sun is the closest
What is the closest object to a earth?
the sun is the closest
