"ଜହ୍ନ" ପୃଷ୍ଠାର ସଂସ୍କରଣ‌ଗୁଡ଼ିକ ମଧ୍ୟରେ ତଫାତ

୪,୩୪୯ ବାଇଟଗୁଡିକ ଯୋଡାଗଲା ,  ୬ ବର୍ଷ ପୂର୍ବେ
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==ଆଧାର==
=== ଦ୍ରଷ୍ଟବ୍ୟ ===
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{{notes
| notes =
{{efn |name = inclination
| Between 18.29° and 28.58° to Earth's [[equator]].<ref name="W06"/><!--Wieczorek et al. 2006; 18.29° when the longitude of the Moon's ascending node is 180°, 28.58° when it is 0°-->
}}
{{efn |name = maxval
| The ''maximum value'' is given based on scaling of the brightness from the value of −12.74 given for an equator to Moon-centre distance of 378&nbsp;000&nbsp;km in the NASA factsheet reference to the minimum Earth–Moon distance given there, after the latter is corrected for Earth's equatorial radius of 6&nbsp;378&nbsp;km, giving 350&nbsp;600&nbsp;km. The ''minimum value'' (for a distant [[new moon]]) is based on a similar scaling using the maximum Earth–Moon distance of 407&nbsp;000&nbsp;km (given in the factsheet) and by calculating the brightness of the [[earthshine]] onto such a new moon. The brightness of the earthshine is {{nowrap|[ Earth [[albedo]] ×}} {{nowrap|([[Earth radius]] /}} Radius of [[Orbit of the Moon|Moon's orbit]])<sup>2</sup>&nbsp;] relative to the direct solar illumination that occurs for a full moon. ({{nowrap|Earth albedo {{=}} 0.367}}; {{nowrap|Earth radius {{=}} (polar}} radius&nbsp;× equatorial {{nowrap|radius)<sup>½</sup> {{=}} 6 367 km}}.)
}}
{{efn |name = angular size
| The range of angular size values given are based on simple scaling of the following values given in the fact sheet reference: at an Earth-equator to Moon-centre distance of 378&nbsp;000&nbsp;km, the [[Angular diameter|angular size]] is 1896&nbsp;[[arcsecond]]s. The same fact sheet gives extreme Earth–Moon distances of 407&nbsp;000&nbsp;km and 357&nbsp;000&nbsp;km. For the maximum angular size, the minimum distance has to be corrected for Earth's equatorial radius of 6&nbsp;378&nbsp;km, giving 350&nbsp;600&nbsp;km.
}}
{{efn |name = pressure explanation
| Lucey et al. (2006) give {{nowrap|10<sup>7</sup> particles cm<sup>−3</sup>}} by day and {{nowrap|10<sup>5</sup> particles cm<sup>−3</sup>}} by night. Along with equatorial surface temperatures of 390&nbsp;[[Kelvin|K]] by day and 100&nbsp;K by night, the [[ideal gas law]] yields the pressures given in the infobox (rounded to the nearest [[order of magnitude]]): 10<sup>−7</sup>&nbsp;[[Pascal (unit)|Pa]] by day and 10<sup>−10</sup>&nbsp;Pa by night.
}}
{{efn |name = near-Earth asteroids
| There are a number of [[near-Earth asteroid]]s, including [[3753 Cruithne]], that are [[co-orbital]] with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term (Morais et al, 2002). These are [[quasi-satellite]]s&nbsp;– they are not moons as they do not orbit Earth. For more information, see [[Other moons of Earth]].
}}
{{efn |name = Moon vs. Charon
| With 27% the diameter and 60% the density of Earth, the Moon has 1.23% of the mass of Earth. The moon [[Charon (moon)|Charon]] is larger relative to its primary [[Pluto]], but Pluto is now considered to be a [[dwarf planet]].
}}
{{efn |name = age
| This age is calculated from isotope dating of lunar rocks.
}}
{{efn |name = orbpd
| More accurately, the Moon's mean sidereal period (fixed star to fixed star) is 27.321661&nbsp;days {{nowrap|(27 d 07 h 43 min 11.5 s)}}, and its mean tropical orbital period (from equinox to equinox) is 27.321582&nbsp;days {{nowrap|(27 d 07 h 43 min 04.7 s)}} (''Explanatory Supplement to the Astronomical Ephemeris'', 1961, at p.107).
}}
{{efn |name = synpd
| More accurately, the Moon's mean synodic period (between mean solar conjunctions) is 29.530589&nbsp;days {{nowrap|(29 d 12 h 44 min 02.9 s)}} (''Explanatory Supplement to the Astronomical Ephemeris'', 1961, at p.107).
}}
{{efn |name = brightness
| The Sun's [[apparent magnitude]] is −26.7, while the full moon's apparent magnitude is −12.7.
}}
{{efn |name = area
| On average, the Moon covers an area of {{nowrap|0.21078 square degrees}} on the night sky.
}}
{{efn |name = size changes
| See graph in [[Sun#Life phases]]. At present, the diameter of the Sun is increasing at a rate of about five percent per billion years. This is very similar to the rate at which the apparent angular diameter of the Moon is decreasing as it recedes from Earth.
}}
}}
}}
 
=== ଟୀକା ===
{{reflist
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