question: Is there a point when the moon will fall out of orbit, and what will that mean for earth?
comment: There is a point where the moon may end up colliding with Earth due to the decay of the moon’s orbit, but it’s not projected to occur until roughly 65 billion years from now. The Sun is expected to enter the tip of its red giant phase in approximately 7.5 billion years, which would most likely destroy Earth and the moon anyway when the sun expands. In about 600 million years, tidal acceleration will push the moon far enough away where total solar eclipses are no longer possible.
passages: When the actual reduction is 1.00 / 1.30, or about 0.770, the perceived reduction is about 0.877, or 1.00 / 1.14. This gives a maximum perceived increase of 14% between apogee and perigee moons of the same phase.
   On 12 December 2008, the full moon was closer to the Earth than it had been at any time in the previous 15 years. This was referred to in popular media as a supermoon.
  
  On 19 March 2011, there was another full "supermoon", closer to the Earth than at any time in the previous 18 years.
  
  On 14 November 2016, there was another full "supermoon"; this time it was closer to the Earth than at any time in the previous 68 years.
  
  Section::::Characteristics.:Formula.
   BULLET::::- 2005 – Hurricane Wilma makes landfall in Florida, resulting in 35 direct and 26 indirect fatalities and causing $20.6B USD in damage.
  
  BULLET::::- 2007 – Chang'e 1, the first satellite in the Chinese Lunar Exploration Program, is launched from Xichang Satellite Launch Center.
  
  BULLET::::- 2008 – "Bloody Friday" saw many of the world's stock exchanges experience the worst declines in their history, with drops of around 10% in most indices.
  
  BULLET::::- 2014 – The China National Space Administration launches an experimental lunar mission, Chang'e 5-T1, which will loop behind the Moon and return to Earth.
   The most recent full supermoon occurred on March 21, 2019, and the next one will be on February 9, 2020. The one on November 14, 2016 was the closest full supermoon since January 26, 1948, and will not be surpassed until November 25, 2034. The closest full supermoon of the 21st century will occur on December 6, 2052.
  
  The oscillating nature of the distance to the full or new moon is due to the difference between the synodic and anomalistic months. The period of this oscillation is about 14 synodic months, which is close to 15 anomalistic months.
   On 8 September 2115 the asteroid will pass about from the moon. On 5 September 1973, the asteroid passed between and from Earth. 2014 RC was removed from the JPL Sentry Risk Table on 5 September 2014 and there are no known possible impact dates in the next 100 years.
  
  Section::::2014 approach.
   The drag from the solar atmosphere may cause the orbit of the Moon to decay. Once the orbit of the Moon closes to a distance of , it will cross the Earth's Roche limit. This means that tidal interaction with the Earth would break apart the Moon, turning it into a ring system. Most of the orbiting ring will then begin to decay, and the debris will impact the Earth. Hence, even if the Earth is not swallowed up by the Sun, the planet may be left moonless. The ablation and vaporization caused by its fall on a decaying trajectory towards the Sun may remove Earth's mantle, leaving just its core, which will finally be destroyed after at most 200 years. Following this event, Earth's sole legacy will be a very slight increase (0.01%) of the solar metallicity.
   On August 10 at 18:16 UTC, the spacecraft passed about from the surface of the Moon. It will continue in its heliocentric orbit, and will return to the vicinity of Earth in 2031.
  
  Section::::Reboot effort.:Contact lost.
   The date and approximate time of a specific full moon (assuming a circular orbit) can be calculated from the following equation:
  
  where "d" is the number of days since 1 January 2000 00:00:00 in the Terrestrial Time scale used in astronomical ephemerides; for Universal Time (UT) add the following approximate correction to "d":
   "The Moon Forgets" tells the story of what happens when the moon falls from the sky, and is adopted by a little boy, while toy moons are produced. The boy and the moon become close friends with each other, but the toy moons are discarded and nothing goes right, because the world misses its moon. The tides, weather, and astronauts are all affected by the loss of the moon. The boy helps the moon to find its way back to its place in the sky, even if it means that they part.
  
  Section::::Reception.
   It was realized in 2017 that should be recoverable during its August 13, 2022 close approach of between and . It will reach an apparent magnitude of +24.0 to +24.7, and its position will have an uncertainty of roughly 5 arcminutes, 1/6th the size of the full moon and well within the field of view of imaging cameras on large telescopes. It should be detectable during that approach by telescopes of least 2 meters diameter in good observing sites, and the improvement of the orbit from the precise August 2022 position will verify or rule out possible future impacts for the next century or so.
   BULLET::::- 2009 – Both a blue moon and a lunar eclipse occur.
  
  BULLET::::- 2010 – Tornadoes touch down in midwestern and southern United States, including Washington County, Arkansas; Greater St. Louis, Sunset Hills, Missouri, Illinois, and Oklahoma, with a few tornadoes in the early hours. A total 36 tornadoes touched down, resulting in the deaths of nine people and $113 million in damages.
  
  BULLET::::- 2011 – NASA succeeds in putting the first of two Gravity Recovery and Interior Laboratory satellites in orbit around the Moon.
   BULLET::::- March 8 – The Moon moves into its nearest point to Earth, called perigee, at the same time as its fullest phase of the Lunar Cycle. The Moon appears to be 14% bigger and 30% brighter than the year's other full moons. The next time these two events coincided will be 2008.
  
  BULLET::::- March 11 – Janet Reno is confirmed by the United States Senate and sworn in the next day, becoming the first female Attorney General of the United States.
  
  BULLET::::- March 12
   Every 18.6 years, the angle between the Moon's orbit and Earth's equator reaches a maximum of 28°36′, the sum of Earth's equatorial tilt (23°27′) and the Moon's orbital inclination (5°09′) to the ecliptic. This is called "major lunar standstill". Around this time, the Moon's declination will vary from −28°36′ to +28°36′. Conversely, 9.3 years later, the angle between the Moon's orbit and Earth's equator reaches its minimum of 18°20′. This is called a "minor lunar standstill". The last lunar standstill was a minor standstill in October 2015. At that time the descending node was lined up with the equinox (the point in the sky having right ascension zero and declination zero). The nodes are moving west by about 19° per year. The Sun crosses a given node about 20 days earlier each year.
   However, an additional subtlety further complicates the picture. The Sun's gravitational attraction on the Moon pulls it toward the plane of the ecliptic, causing a slight wobble of about 9 arcmin within a 6-month period. In 2006, the effect of this was that, although the 18.6-year maximum occurred in June, the maximum declination of the Moon was not in June but in September, as shown in the third diagram.
  
  Section::::Other complications.
   In practice, there is no official or even consistent definition of how near perigee the full Moon must occur to receive the supermoon label, and new moons rarely receive a supermoon label. Sky and Telescope magazine refers to full Moon which comes within , TimeandDate.com prefers a definition of . EarthSky uses Nolle's definition comparing their calculations to tables published by Nolle in 2000.
   January 2018 lunar eclipse
  
  A total lunar eclipse occurred on January 31, 2018. The Moon was near its perigee on January 30 and as such may be described as a "supermoon". The previous supermoon lunar eclipse was in September 2015.
   Its next close approach to Earth will be on 15 February 2046 when it will pass about from Earth. Based on 7 radar observations, the next close approach to Earth similar to the 2013 passage will be on 16 February 2123 when Duende will pass no closer than from the center of Earth. For the 2123 passage, the nominal pass will be from the center of the Moon and then from the center of Earth.
  
  Section::::Risks.
   Strictly speaking, the lunar standstill is a moving position in space relative to the direction of Earth's axis and to the rotation of the Moon's orbital nodes (lunar nodal precession) once every 18.6 years. The standstill position does not persist over the two weeks that the Moon takes to move from its maximum (positive) declination to its minimum (negative) declination, and it most likely will not exactly coincide with either extreme.
   BULLET::::- For UT: analysis of historical observations shows that ΔT has a long-term increase of +31 s/cy. Converted to days and lunations, the correction from ET to UT becomes:
   The Moon is gradually receding from Earth into a higher orbit, and calculations suggest that this would continue for about 50 billion years. By that time, Earth and the Moon would be in a mutual spin–orbit resonance or tidal locking, in which the Moon will orbit Earth in about 47 days (currently 27 days), and both the Moon and Earth would rotate around their axes in the same time, always facing each other with the same side. This has already happened to the Moon—the same side always faces Earth—and is also slowly happening to the Earth. However, the slowdown of Earth's rotation is not occurring fast enough for the rotation to lengthen to a month before other effects change the situation: approximately 2.3 billion years from now, the increase of the Sun's radiation will have caused Earth's oceans to evaporate, removing the bulk of the tidal friction and acceleration.
   BULLET::::- One third of the world's energy could be solar, according to projections by the International Energy Agency (IEA).
  
  Section::::Predictions.:2061.
  
  BULLET::::- Commercial mining of the Moon's elements could be economically feasible.
  
  BULLET::::- Expected expiration of the Singapore-Malaysia Water Agreement.
  
  BULLET::::- July 28 – Halley's Comet reaches its perihelion, the closest point to the Sun—the last return reached its perihelion on February 9, 1986.
  
  Section::::Predictions.:2065.
  
  BULLET::::- November 11 – Transit of Mercury
   The object made four Earth orbits of about three months each before being ejected after the June 2007 perigee. At that perigee, it dipped inside the Moon's orbit to a distance of . became an Apollo-class asteroid in June 2007.
  
  Section::::14 June 2007 perigee.
  
  On 14 June 2007, made its fourth and last perigee of the most recent Earth encounter. It was 0.7 lunar distances at closest, with an apparent magnitude of 18.5–19.0. Astronomers at JPL Goldstone in California made radar astrometry measurements on 12, 14 and 17 June 2007.
  
  Section::::Future events.
   A total lunar eclipse will take place on January 31, 2037. The Moon will be plunged into darkness for 1 hour and 4 minutes, in a deep total eclipse which will see the Moon 21% of its diameter inside the Earth's umbral shadow. The visual effect of this depends on the state of the Earth's atmosphere, but the Moon may be stained a deep red colour for observers in north and west North America, most of Asia, Australia and New Zealand. The partial eclipse will last for 3 hours and 18 minutes in total. It occurs during a supermoon (perigee), and blue moon (second full moon of month), just like the eclipse of January 31, 2018, one metonic cycle (19 years) previous.
   Atomic clocks also show that Earth's day lengthens by about 15 microseconds every year, slowly increasing the rate at which UTC is adjusted by leap seconds.
  
  Left to run its course, this tidal drag would continue until the spin of Earth and the orbital period of the Moon matched, creating mutual tidal locking between the two. As a result, the Moon would be suspended in the sky over one meridian, as is already currently the case with Pluto and its moon Charon. However, the Sun will become a red giant engulfing the Earth-Moon system long before this occurrence.
   From 24 February to 19 March, the main engine was used four times for orbit raising, putting its apogee close to the Moon's orbital distance. The spacecraft performed maneuvers so as to be successfully captured into an elliptical lunar orbit on 4 April 2019, and adjusted its flight pattern in a circular orbit around the Moon. Once it was in the correct circular orbit, it was planned to decelerate for a soft landing on the lunar surface. This was planned for 11 April 2019.
  
  Section::::Planned landing site.
  