Earth's orbit

elliptical path. This path is known as an orbit. Earth's orbit is not a perfect circle. It is an ellipse. The Earth's orbit takes about 365 days, this is also...

planet, or a moon. It can also be used as a verb. For instance: “The earth orbits around the Sun.” The word ‘revolves’ has the same meaning, but 'rotates'...

A geostationary orbit (or Geostationary Earth Orbit - GEO) is a type of geosynchronous orbit directly above the Earth's equator (0° latitude). Like all...

A low Earth orbit (LEO) is usually described as an orbit inside the area which comes from the Earth’s surface up to an altitude of 2,000 kilometres (1...

reference plane. The reference plane for the Solar System is usually the Earth's orbital plane. This defines the ecliptic, the path on the celestial sphere...

Milankovich cycle is any slow but regular change in the Earth's orbit around the Sun, and the tilt of the Earth's axis. The dynamics are complex. The changes affect...

Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earth's orbit. A few tens of thousands have been found. Sometimes one crashes into...

ecliptic is the plane of Earth's orbit around the Sun. The Sun appears to move against the background of stars because the Earth orbits the Sun. The invariable...

road. Near-Earth asteroid Asteroid impact prediction Late Heavy Bombardment An astronomical unit (AU) is the semi-major axis of the Earth's orbit. That is...

The center of Earth (Earth's core) is mostly iron (88.8%), nickel (5.8%), sulfur (4.5%), and less than 1% other elements. The Earth's crust is largely oxygen...

An Earth-crosser asteroid[source?] is an asteroid whose orbit crosses Earth's orbit. This short article about science can be made longer. You can help...

launch to orbit is a method of launching rockets. An airplane carries the rocket, which would then be launched to carry satellites to low Earth orbit. "Flight...

the planet's difference in orbit from a perfect circle, the axis of the planet tilting, and pushing of the Earth's orbit. As part of the supercontinent...

Orbital forcing is the effect on climate of slow changes in the tilt of the Earth's axis and shape of the orbit (see Milankovitch cycles). These orbital...

astronomical unit (AU) is a unit of length derived from the Earth's orbit. It is the average distance the Earth gets from the Sun on the long axis of the ellipse...

the Earth's seasons come and go mainly because Earth does not rotate with its axis exactly upright with respect to the plane of the Earth’s orbit around...

synchronized with Earth's orbit for a long time. There is no danger of a collision with Earth for millions of years, if ever. Its orbital path and Earth's do not...

elliptical orbit occurs when the eccentricity of its orbit is greater than 0, and less than 1. The Moon moves around the Earth in an elliptical orbit, and the...

apart and Helios. It's an apoapsis of an body in the Solar System. The Earth's orbit has its aphelion around July the third, at which it is approximately...

satellite that orbits the Earth. Most artificial satellites also orbit the Earth, but some orbit other planets, or the Sun or Moon. Satellites are used for...