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JAPAPA is abbreviation of Jet Amplification by Pair Anihilation of Photospin and Antispin. Surface subspin induced by Photo spin effect of sun light flows to terminator of earth where pair anihilation is afterglow. It is amplification because less than half energy were used for the generation of Surface subspin.

## AmplificationEdit

If gravitational force is given by gravitational jet,

$F= m_e v^2 /r_e = dm/dt c$

$dm/dt = m_e r_e \omega_e^2 /c$

$gain= c dm/dt /(\pi r_e^2 P_x)$

where Px is photon momentum per unit area per unit time incident which is sunlight intensity divided by c.

$gain= m_e \omega_e^2 c /(\pi r_e P_s)$

where Ps is sunlight intensity

## Sunlight intensity in the Solar SystemEdit

Different bodies of the Solar System receive light of an intensity inversely proportional to the square of their distance from Sun. A rough table comparing the amount of light received by each planet on the Solar System follows (from data in [1]):

Planet Perihelion - Aphelion
distance (AU)sq.
maximum and minimum
(W/m²)
Orbital
Mercury 0.3075 – 0.4667 14,446 – 6,272 0.565
Venus 0.7184 – 0.7282 2,647 – 2,576 0.826
Earth 0.9833 – 1.017 1,413 – 1,321 1
Mars 1.382 – 1.666 715 – 492 1.287
Jupiter 4.950 – 5.458 55.8 – 45.9 2.689
Saturn 9.048 – 10.12 16.7 – 13.4 3.870
Uranus 18.38 – 20.08 4.04 – 3.39 5.885
Neptune 29.77 – 30.44 1.54 – 1.47 7.705

The actual brightness of sunlight that would be observed at the surface depends also on the presence and composition of an atmosphere. For example Venus' thick atmosphere reflects more than 60% of the solar light it receives. The actual illumination of the surface is about 5,000–10,000 lux, comparable to that of Earth during a dark, very cloudy day.

Sunlight on Mars would be more or less like daylight on Earth wearing sunglasses, and as can be seen in the pictures taken by the rovers, there is enough diffuse sky radiation that shadows would not seem particularly dark. Thus it would give perceptions and "feel" very much like Earth daylight.

For comparison purposes, sunlight on Saturn is somewhat slightly brighter than Earth sunlight on the average sunset or sunrise. Even on Pluto the Sun would be still bright enough to almost match the average living room. To see the Sun shine as dim as the full Moon on the Earth, a distance of about 500 AU (~69 light-hours) is needed: there is only a handful of objects in the solar system known to orbit farther than such a distance, among them 90377 Sedna and (87269) 2000 OO67.