About five million four hundred two thousand one hundred seventy eight miles.

Distant.










1 second on.










Half that.










http://en.wikipedia.org/wiki/Astronomical_unit


Astronomical unit

From Wikipedia, the free encyclopedia

The astronomical unit (symbol au or AU) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally, each distance was measured through observation, and the astronomical unit was defined as their average, half the sum of the maximum and minimum, making the unit a kind of medium measure for the Earth–Sun distance. It is now defined as exactly 149597870700 meters (about 150 million kilometers, or 93 million miles).










http://en.wikipedia.org/wiki/Lagrangian_point


Lagrangian point

From Wikipedia, the free encyclopedia


Lagrange points

The five Lagrangian points are labeled and defined as follows:

The L1 point lies on the line defined by the two large masses M1 and M2, and between them. It is the most intuitively understood of the Lagrangian points: the one where the gravitational attraction of M2 partially cancels M1's gravitational attraction.

Explanation: An object that orbits the Sun more closely than Earth would normally have a shorter orbital period than Earth, but that ignores the effect of Earth's own gravitational pull. If the object is directly between Earth and the Sun, then Earth's gravity counteracts some of the Sun's pull on the object, and therefore increases the orbital period of the object. The closer to Earth the object is, the greater this effect is. At the L1 point, the orbital period of the object becomes exactly equal to Earth's orbital period. L1 is about 1.5 million kilometers from Earth.










1.5 million kilometers = ~ 932 thousand miles










http://www.britannica.com/EBchecked/topic/103501/Ceres

Encyclopædia Britannica


Ceres

Dwarf planet

Ceres, dwarf planet, the largest asteroid in the main asteroid belt, and the first asteroid to be discovered.


Ceres revolves around the Sun once in 4.61 Earth years in a nearly circular, moderately inclined (10.6°) orbit at a mean distance of 2.77 astronomical units (AU; about 414 million km [257 million miles]).










http://en.wikipedia.org/wiki/Moon


Moon

From Wikipedia, the free encyclopedia

The Moon (Latin: Luna) is Earth's only natural satellite.


Orbital characteristics

Perigee 362600 km

(356400–370400 km)

Apogee 405400 km

(404000–406700 km)



- posted by H.V.O.M - Kerry Wayne Burgess 7:37 PM Pacific Time Spokane Valley Washington USA Friday 17 April 2015