Earth's orbit

Earth's orbit, Trajectory of Earth around the Sun.

Earth's orbit image

Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), and one complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). Ignoring the influence of other solar system bodies, Earth's orbit is an ellipse with the Earth-Sun barycenter as one focus and a current eccentricity of 0.0167; since this value is close to zero, the center of the orbit is close, relative to the size of the orbit, to the center of the Sun. As seen from Earth, the planet's orbital prograde motion makes the Sun appear to move with respect to other stars at a rate of about 1° eastward per solar day (or a Sun or Moon diameter every 12 hours). Earth's orbital speed averages 29.78 km/s (107,208 km/h; 66,616 mph), which is fast enough to cover the planet's diameter in 7 minutes and the distance to the Moon in 4 hours.From a vantage point above the north pole of either the Sun or Earth, Earth would appear to revolve in a counterclockwise direction around the Sun. From the same vantage point, both the Earth and the Sun would appear to rotate also in a counterclockwise direction about their respective axes.

Low Earth orbit
4 months ago

Low Earth orbit ... A low Earth orbit (LEO) is an Earth-centered orbit close to the planet, often specified as an orbital period of 128 minutes or less (making at least 11...

Medium Earth orbit
4 months ago

Medium Earth orbit ... geosynchronous orbit, in which a satellite takes 24 hours to circle the Earth, the same period as the Earth’s own rotation. All satellites in MEO have an orbital period...

High Earth orbit
5 months ago

High Earth orbit ... orbit (90° > inclination ≥ 0°), their orbital velocity is lower than Earth's rotational speed, causing their ground track to move westward on Earth's...

Geosynchronous orbit
5 months ago

Geosynchronous orbit ... A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours...

Geostationary orbit
6 months ago

Geostationary orbit ... above Earth's equator (42,164 kilometers in radius from Earth's center) and following the direction of Earth's rotation. An object in such an orbit has...

Orbital speed
6 months ago

Orbital speed ... moving 54.6 km/s when 0.586 AU (87,700 thousand km) from the Sun, 41.5 km/s when 1 AU from the Sun (passing Earth's orbit), and roughly 1 km/s at aphelion...

Geocentric orbit
5 months ago

Geocentric orbit ... A geocentric orbit or Earth orbit involves any object orbiting the Earth, such as the Moon or artificial satellites. In 1997 NASA estimated there were...

Sun-synchronous orbit
6 months ago

Sun-synchronous orbit ... the orbit is not fixed in space relative to the distant stars, but rotates slowly about the Earth's axis. Typical Sun-synchronous orbits around Earth are...

Orbit of the Moon
4 months ago

Orbit of the Moon ... from Earth's center, which corresponds to about 60 Earth radii or 1.282 light-seconds. With a mean orbital velocity of 1.022 km/s (0.635 miles/s), the...

List of orbits
5 months ago

List of orbits ... artificial satellites. Lunar orbit (also selenocentric orbit): An orbit around Earth's Moon. Areocentric orbit: An orbit around the planet Mars, such...

Axial tilt
5 months ago
Polar orbit
6 months ago
Lagrange point
6 months ago
Hohmann transfer orbit
6 months ago
Earth's rotation
4 months ago
Milankovitch cycles
5 months ago
Orbit: Earth's Extraordinary Journey
4 months ago
Graveyard orbit
6 months ago
Orbital period
5 months ago
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