Siteadmin, Check users, Administrators
12,071
edits
Changes
no edit summary
|caption=The Moon one week after [[full moon]]
|caption=The Moon one week after [[full moon]]
|primary=Earth
|primary=Earth
|periapsis=363,300 km
|periapsis=363,300 km<ref name=moonfact>"[http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html Moon Fact Sheet]," [[NASA]], April 19, 2007. Accessed May 3, 2008.</ref>
|apoapsis=405,500 km
|apoapsis=405,500 km<ref name=moonfact/>
|semimajor=384,400 km
|semimajor=384,400 km<ref name=moonfact/><ref name=ssdorbit>"[http://ssd.jpl.nasa.gov/?sat_elem Planetary Satellite Mean Orbital Parameters]." [[Jet Propulsion Laboratory|JPL]], [[National Aeronautics and Space Administration|NASA]]. Accessed March 25, 2008.</ref>
|orbitradius=378,000 km
|orbitradius=378,000 km
|eccentricity=0.0549
|eccentricity=0.0549<ref name=moonfact/><ref name=ssdorbit/>
|sidereal=27.3217 da
|sidereal=27.3217 da
|synodic=29.530588 da
|synodic=29.530588 da
|orbitspeed=1.023 km/s
|orbitspeed=1.023 km/s
|inclination=18.28°
|inclination=18.28°<ref name=moonfact/>
|siderealday=27.3217 da
|siderealday=27.3217 da<ref name=moonfact/><ref name=ssdorbit/>
|solarday=29.530588 da
|solarday=29.530588 da
|mass=7.35 * 10<sup>22</sup> (1.23% earth)
|mass=7.35 * 10<sup>22</sup> (1.23% earth)<ref name=moonfact/>
|density=3350 kg/m³
|density=3350 kg/m³<ref name=ssdphys>"[http://ssd.jpl.nasa.gov/?sat_phys_par Planetary Satellite Physical Parameters]." [[Jet Propulsion Laboratory|JPL]], [[National Aeronautics and Space Administration|NASA]]. Accessed March 25, 2008.</ref>
|surfacegrav=1.62 m/s² (0.165 ''g'')
|surfacegrav=1.62 m/s² (0.165 ''g'')<ref name=moonfact/>
|escapespeed=2.38 km/s
|escapespeed=2.38 km/s<ref name=moonfact/>
|meanradius=1737.1 km
|meanradius=1737.1 km<ref name=moonfact/><ref name=ssdphys/>
|equatorradius =1738.1 km
|equatorradius =1738.1 km<ref name=moonfact/>
|polarradius =1736.0 km
|polarradius =1736.0 km<ref name=moonfact/>
|surfacearea=37,919,000 km² (7.434% earth)
|surfacearea=37,919,000 km² (7.434% earth)
|mintemp=100 K
|mintemp=100 K
|meantemp=250 K
|meantemp=250 K
|maxtemp=400 K
|maxtemp=400 K
|albedo=0.12<ref name=moonfact/>
|pmdm=1.3 * 10<sup>15</sup> N-m/T<ref name=Humphreys>Humphreys, D. R. "[http://www.creationresearch.org/crsq/articles/21/21_3/21_3.html The Creation of Planetary Magnetic Fields]." ''[[Creation Research Society Quarterly]]'' 21(3), December 1984. Accessed April 29, 2008.</ref>
|cmdm=1.73 * 10<sup>22</sup> N-m/T<ref name=Humphreys/>
|mdt=364 a<ref name=Humphreys/>
|mhl=252.3 a<ref name=calc>Calculated</ref>
}}The '''Moon''' is a natural [[satellite]] orbiting the [[Earth]] at an average distance of about 238,000 miles (380,000 km).
}}The '''Moon''' is a natural [[satellite]] orbiting the [[Earth]] at an average distance of about 238,000 miles (380,000 km).
The Moon currently recedes from the Earth at a rate of 1.5 inches (3.8 cm) per year<ref>NASA [http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/ApolloLaser.html Measuring the Moon's Distance], LPI Bulletin, No. 72, August, 1994.</ref>, and is believed by mainstream scientists to be 4.6 billion years old <ref>NASA, [http://history.nasa.gov/SP-350/ch-15-2.html Apollo Expeditions to the Moon], Chapter 15.2.</ref>.<br />The Moon could never have been closer than about 11,000 miles or it would have been broken up by tidal forces.<ref name="js">Sarfati, Jonathan, [http://www.creationontheweb.com/content/view/764/ The moon: the light that rules the night], ''Creation'' 20(4):36–39, September 1998.</ref><br />If the rate of recession stayed constant at 3.8 cm per year, it would take 9.6 billion years for the lunar distance to migrate from 11,000 miles to the present distance of about 240,000 miles.<br />However, the rate of recession would not have been constant, but would have been greater in the past, so that extrapolating backwards in time results in the moon being in contact with the earth 1.37 billion years ago,<ref name="js" /> seemingly (if the assumptions stated above are correct) contradicting the view of an [[Old Earth]] promoted by [[atheists]].
The Moon currently recedes from the Earth at a rate of 1.5 inches (3.8 cm) per year<ref>NASA [http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/ApolloLaser.html Measuring the Moon's Distance], LPI Bulletin, No. 72, August, 1994.</ref>, and is believed by mainstream scientists to be 4.6 billion years old <ref>NASA, [http://history.nasa.gov/SP-350/ch-15-2.html Apollo Expeditions to the Moon], Chapter 15.2.</ref>.<br />The Moon could never have been closer than about 11,000 miles or it would have been broken up by tidal forces.<ref name="js">Sarfati, Jonathan, [http://www.creationontheweb.com/content/view/764/ The moon: the light that rules the night], ''Creation'' 20(4):36–39, September 1998.</ref><br />If the rate of recession stayed constant at 3.8 cm per year, it would take 9.6 billion years for the lunar distance to migrate from 11,000 miles to the present distance of about 240,000 miles.<br />However, the rate of recession would not have been constant, but would have been greater in the past, so that extrapolating backwards in time results in the moon being in contact with the earth 1.37 billion years ago,<ref name="js" /> seemingly (if the assumptions stated above are correct) contradicting the view of an [[Old Earth]] promoted by [[atheists]].
===Impact Craters===
Uniformitarian astronomers assume that crater impacts are a reliable indicator of the age of a celestial body. True to the form and principles of [[uniformitarianism]] (as applied to [[astronomy]] rather than to [[geology]]), any such estimation relies upon uniform constants and weather/erosion trends. Recent research into crater impacts on the moon suggests that many of the assumptions previously made are unwarranted. Bonnie Buratti of NASA's Jet Propulsion Laboratory has asserted that space weathering "takes place very rapidly on the Moon."<ref>David, Leonard. "[http://www.space.com/missionlaunches/lunar_impact_021214.html Lunar Crash of 1953: Impact Crater Identified]." <http://www.space.com>, December 14, 2002. Accessed January 16, 2008.</ref> Peter Brown of the University of Western Ontario insists that there is no absolute criteria for the dating of craters.<ref>Hecht, Jeff. "[http://www.newscientist.com/article.ns?id=dn3242 New crater revives Moon mystery]." <http://www.newscientist.com>, January 11, 2003. Accessed January 16, 2008.</ref>
Danny Faulkner of the [[Institute for Creation Research]] has observed that many of the lunar maria contain ''ghost craters'', or craters that the lava flow that produced the maria seem to have filled only partially. In the [[deep time]] scale required by [[uniformitarianism]], the ghost craters are the result of impacts that occurred as much as half a gigayear before the crust-fracturing impacts that caused the lava flows.<ref name=Henderson>Henderson, Thomas H. "[http://www.hal-pc.org/~tom/HeavyCratering.html Do heavily cratered planets and moons demand an old age for the solar system]?" ''Tom Henderson's Creation Resources'', July 25, 2003. Accessed March 25, 2008.</ref> This is not a reasonable assumption, because any impact strong enough to crack the crust should have obliterated any craters previously extant. Faulkner thus concludes that the impacts that formed the ghost craters, and those that let loose the lava flows that formed the maria, occurred within days of one another<ref name=Faulkner1>Faulkner, Danny. "[http://www.icr.org/research/index/researchp_df_r01/ The Current State of Creation Astronomy]." ''Proceedings of the Fourth International Conference on Creationism,'' [[Creation Science Fellowship]], Pittsburgh, pp. 201–216, August 3-8, 1998. Hosted at ''[[Institute for Creation Research]].'' Accessed March 25, 2008.</ref> and were probably part of aat least one system-wide catastrophe involving a narrow stream of meteoroids and/or comets that delivered a concentrated bombardment of the Earth and Moon in a short interval.<ref name=Faulkner2>Faulkner, Danny. "[http://www.answersingenesis.org/tj/v13/i1/crater.asp A Biblically-based cratering theory]." ''TJ'' (now ''[[Journal of Creation]]''), 13(1):100-104, April 1999. Hosted by ''[[Answers in Genesis]].'' Accessed March 25, 2008.</ref>
Faulkner assumes that this system-wide catastrophe occurred during the year of the [[Great Flood]]. But in 1984, Russell Humphreys, then at the Sandia National Laboratories, developed evidence suggesting different dates entirely. Specifically, the [[Project Apollo]] exploration teams brought back many samples of [[basalt]] (an [[igneous rock]]) and [[brecchia]] (pulverized meteor-impact remains). Geologists analyzed both types of samples and found evidence that each type of rock had once been in a magnetic field far more powerful than that which the Moon has today. Using his model for the creation and decay of magnetic fields<ref name=Humphreys/>, Humphreys determined that the basalt had been laid down about 370 years after creation, and the brecchia had been laid down 1840 years after creation, or about 190 years after the Flood.<ref name=Humphreys2>Humphreys reasoned that the higher the magnetic dipole moment of the samples, the earlier in lunar history they were formed.</ref> These findings clearly suggest that the Moon, and presumably all other bodies in the solar system, have been subject to two separate system-wide bombardments, one occurring in the second or third generation after the [[fall of man]] and the other occurring well after the Flood.
==Tides==
==Tides==
The phrase "the ''dark'' side of the Moon" is inaccurate because the Moon does rotate relative to the Sun, with the same period as its period of revolution, once every 29 days. Our view of the Moon from the Earth always shows the same side of the Moon, with the same markings and features. When the Moon is full, the entire side that faces us is experiencing lunar "day" and is lit by the Sun. Two weeks later, when the Moon is new, the side that faces us is experiencing solar "night" and is unlit (and virtually invisible).
The phrase "the ''dark'' side of the Moon" is inaccurate because the Moon does rotate relative to the Sun, with the same period as its period of revolution, once every 29 days. Our view of the Moon from the Earth always shows the same side of the Moon, with the same markings and features. When the Moon is full, the entire side that faces us is experiencing lunar "day" and is lit by the Sun. Two weeks later, when the Moon is new, the side that faces us is experiencing solar "night" and is unlit (and virtually invisible).
The far side of the moon is far more heavily cratered than the near, and the predominant type of cratering is consistent with brecchia-forming meteor impact. This would suggest that the far side suffered its bombardment in the latter of the two catastrophes that Humphreys suggests that the Moon has suffered.
Due to a slight "wobble" in the lunar motion called ''libration,'' we actually see a little bit more than half of the Moon's surface; sometimes it is turned a bit one way and sometimes the other. However, nobody had any idea of what the far side of the Moon looked like until 1959, when a Soviet satellite photographed it and relayed pictures back.
Due to a slight "wobble" in the lunar motion called ''libration,'' we actually see a little bit more than half of the Moon's surface; sometimes it is turned a bit one way and sometimes the other. However, nobody had any idea of what the far side of the Moon looked like until 1959, when a Soviet satellite photographed it and relayed pictures back.