Explain the shape and the determeinter of the earth?
Answers
Answer:
hey mate
Explanation:
A sphere is a round, solid shape. The Earth is not quite a perfect sphere: it actually is a little fatter at the equator, the invisible line that goes around the middle of the Earth. It was only a few hundred years ago that people thought that our planet was flat. ... Airplanes also help prove that the Earth is round.
what is earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating estimation and other evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, which is Earth's only natural satellite. Earth orbits around the Sun in 365.256 solar days, a period known as an Earth sidereal year. During this time, Earth rotates about its axis 366.256 times, that is, a sidereal year has 366.256 sidereal days.
Designations
Alternative names-
Terra, Tellus, Gaia, Gaea, the World
Adjectives-
Earthly, terrestrial, terran, tellurian
Orbital characteristics
Epoch J2000[n 1]
Aphelion-
152100000 km[n 2]
(94500000 mi; 1.017 AU)
Perihelion-
147095000 km[n 2]
(91401000 mi; 0.98327 AU)
Semi-major axis-
149598023 km[1]
(92955902 mi; 1.00000102 AU)
Eccentricity-
0.0167086[1]
Orbital period-
365.256363004 d[2]
(1.00001742096 yr)
Average orbital speed-
29.78 km/s[3]
(107200 km/h; 66600 mph)
Mean anomaly-
358.617°
Inclination-
7.155° to the Sun's equator;
1.57869°[4] to invariable plane;
0.00005° to J2000 ecliptic
Longitude of ascending node-
−11.26064°[3] to J2000 ecliptic
Argument of perihelion-
114.20783°[3]
Satellites--
1 natural satellite: the Moon
5 quasi-satellites
>1 800 operational artificial satellites[5]
>16 000 space debris[n 3]
Physical characteristics--
Mean radius--
6371.0 km (3958.8 mi)[6]
Equatorial radius-
6378.1 km (3963.2 mi)[7][8]
Polar radius-
6356.8 km (3949.9 mi)[9]
Flattening-
0.0033528[10]
1/298.257222101 (ETRS89)
Circumference-
40075.017 km equatorial (24901.461 mi)[8]
40007.86 km meridional (24859.73 mi)[11][n 4]
Surface area-
510072000 km2 (196940000 sq mi)[12][13][n 5]
148940000 km2 land (57510000 sq mi; 29.2%)
361132000 km2 water (139434000 sq mi; 70.8%)
Volume-
1.08321×1012 km3 (2.59876×1011 cu mi)[3]
Mass-
5.97237×1024 kg (1.31668×1025 lb)[14]
(3.0×10−6 M☉)
Mean density-
5.514 g/cm3 (0.1992 lb/cu in)[3]
Surface gravity-
9.80665 m/s2 (1 g; 32.1740 ft/s2)[15]
Moment of inertia factor-
0.3307[16]
Escape velocity-
11.186 km/s[3]
(40270 km/h; 25020 mph)
Sidereal rotation period-
0.99726968 d[17]
(23h 56m 4.100s)
Equatorial rotation velocity-
0.4651 km/s[18]
(1674.4 km/h; 1040.4 mph)
Axial tilt-
23.4392811°[2]
Albedo-
0.367 geometric[3]
0.306 Bond[3]
Surface temp. min mean max-
Kelvin 184 K[19] 287.16 K[20] (years 1961-1990) 330 K[21]
Celsius −89.2 °C 14.0 °C (years 1961-1990) 56.9 °C
Fahrenheit −128.5 °F 57.2 °F (years 1961-1990) 134.3 °F
Atmosphere
Surface pressure ---
101.325 kPa (at MSL)
Composition by volume---
78.08% nitrogen (N
2; dry air)[3]
20.95% oxygen (O
2)
~ 1% water vapor (climate variable)
0.9340% argon
0.0408% carbon dioxide[22]
0.00182% neon[3]
0.00052% helium
0.00017% methane
0.00011% krypton
0.00006% hydrogen