BLOGS

MOON-LIGHT TO THE NIGHT SKY

December 19, 2019

3 min read

ABOUT

The Moon is the only natural satellite and it is the fifth-largest satellite. The moon shows us the same face because it takes27.3 days both to rotate on its axis and to orbit earth. By sunlight reflects we see full moon. half moon or no moon[new moon]. The shape of the moon depends upon the position in relation to the earth and sun. moon has a thin atmosphere.so a layer of dust or a footprint can site for centuries.

CHARACTERISTICES

Distance to earth – 384.400km

Gravity – 1.62m/s

Designations
Adjectives	Lunar selenic
ORBITAL CHARACTERISTICES Epoch J2000

Perigee	362600 km (356400–370400 km)
Apogee	405400 km (404000–406700 km)
Semi-major axis	384399 km (0.00257 AU)^[1]
Eccentricity	0.0549^[1]
Orbital period	27.321661 d (27 d 7 h 43 min 11.5 s^[1])
Synodic period	29.530589 d (29 d 12 h 44 min 2.9 s)
Average orbital speed	1.022 km/s
Inclination	5.145° to the ecliptic^[2]^[a]
Longitude of ascending node	Regressing by one revolution in 18.61 years
Argument of perigee	Progressing by one revolution in 8.85 years
Satellite of	Earth^[b]^[3]
PHYSICAL CHARACTERISTICS
Mean radius	1737.4 km (0.2727 of Earth’s)^[1]^[4]^[5]
Equatorial radius	1738.1 km (0.2725 of Earth’s)^[4]
Polar radius	1736.0 km (0.2731 of Earth’s)^[4]
Flattening	0.0012^[4]
Circumference	10921 km (equatorial)
Surface area	3.793×10⁷ km² (0.074 of Earth’s)
Volume	2.1958×10¹⁰ km³ (0.020 of Earth’s)^[4]
Mass	7.342×10²² kg (0.012300 of Earth’s)^[1]^[4] ^[6]
Mean density	3.344 g/cm³^[1]^[4] 0.606 × Earth
Surface gravity	1.62 m/s² (0.1654 g)^[4]
Moment of inertia factor	0.3929±0.0009^[7]
Escape velocity	2.38 km/s
Sidereal rotation period	27.321661 d (synchronous)
Equatorial rotation velocity	4.627 m/s
Axial tilt	1.5424° to ecliptic6.687° to orbit plane^[2]24° to Earth’s equator ^[8]
North pole right ascension	17^h 47^m 26^s266.86°^[9]
North pole declination	65.64°^[9]
Albedo	0.136^[10]
Surface temp. min mean max Equator 100k 220K 230K^[11] 85°N
Apparent magnitude	−2.5 to −12.9^[c]−12.74 (mean full moon)^[4]
Angular diameter	29.3 to 34.1 arcminutes^[4]^[d]
ATMOSPHERE^:
Surface pressure	10⁻⁷ Pa (1 picobar) (day)10⁻¹⁰ Pa (1 femtobar) (night)^[e]
Composition by volume	He Ar Ne Na K H Rn

INTERNAL STRUCTURE

The moon has a very small core.1 to 2 percent of the moon’s mass 420 miles[680 km] wide. Moon consist of iron.sulpher and other elements. Moon’s rocky mantle is about 825 miles thick which is made up of rocks that contain iron and magnesium.

LUNAR ECLIPSES

As we all know that Lunar eclipse occurs when the Earth gets between the Sun and the Moon during the earth’s revolution and rotation.during lunar eclipse full moon occurs

SOLAR ECLIPSES

When Moon enters in between the Sun and the Earth is known as Solar Eclipse. There is no moon during Solar Eclipse

SURFACE COMPOSITION

The weight of the lunar surface is 43 percent oxygen 20 percent silicon and 19 percent magnesium and 10 percent iron and 3 percent calcium and3 percent aluminum and 0.42 percent chromium and 0.18 percent titanium and 00.12 percent manganese. Orbiters have found the traces of water on the lunar surface.water is abundant on slop facing the lunar south pole. After research on water scientists caution that the water is an “Extremely dry desert”