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Sirius satellite location

Satellites in geostationary orbit turn using world directly over the equator, continually remaining over the same place. This position enables satellites to see or watch weather condition also phenomena that differ on quick timescales. (NASA images by Marit Jentoft-Nilsen and Robert Simmon.)

Because geostationary satellites are always over a single area, they could be useful for interaction (mobile phones, television, radio). Built and established by NASA and managed by the National Oceanic and Atmospheric Administration (NOAA), the GOES satellites provide a search and relief beacon used to assist locate ships and airplanes in stress.

Finally, many large Earth orbiting satellites monitor solar activity. The GOES satellites carry a large contingent of “space weather condition” devices that take images of Sun and track magnetic and radiation levels in area around all of them.

Other orbital “sweet places, ” simply beyond large planet orbit, will be the Lagrange points. On Lagrange things, the pull of gravity from the Earth cancels from pull of gravity through the sunlight. Something put at these things will feel equally drawn toward the Earth together with sunlight and certainly will revolve with all the world round the Sun.

For the five Lagrange things in the Sun-Earth system, only the final two, called L4 and L5, are steady. A satellite at other three things is much like a ball balanced during the peak of a high hill: any slight perturbation will push the satellite out of the Lagrange point just like the basketball moving along the mountain. Satellites at these three points require continual modifications to stay balanced as well as in place. Satellites on final two Lagrange points tend to be more like a ball in a bowl: whether or not perturbed, they return to the Lagrange point.

Lagrange things tend to be unique locations in which a satellite will remain fixed in accordance with our planet as satellite therefore the world revolve round the Sun. L1 and L2 are placed over the day-and-night sides associated with world, respectively. L3 is on the other hand associated with sunlight, opposite our planet. L4 and L5 tend to be 60° forward and behind the planet earth in identical orbit. (NASA illustration by Robert Simmon.)

The Lagrange points nearest the planet earth are about 5 times the exact distance through the world to the Moon. L1 is between the Sun and Earth, and constantly views the Earth’s daylight part. L2 is opposite the sunlight, always from the night side. (NASA illustration by Robert Simmon.)

The very first Lagrange point is located between the world additionally the sunlight, giving satellites at this time a constant view associated with Sun. The Solar and Heliospheric Observatory (SOHO), a NASA and European Space department satellite tasked to monitor the Sun, orbits the very first Lagrange point, about 1.5 million kilometers from world.

The next Lagrange point is approximately the same distance through the world, but is positioned behind the Earth. World is often amongst the 2nd Lagrange point as well as the sunlight. Since the Sun and Earth are in one line, satellites at this place just require one heat shield to prevent temperature and light from sunlight and world. It's good place for room telescopes, including the future James Webb area Telescope (Hubble’s successor, scheduled to launch in 2014) plus the current Wilkinson Microwave Anisotropy Probe (WMAP), useful for learning the type associated with the world by mapping back ground microwave oven radiation.

The 3rd Lagrange point is opposite the Earth on the reverse side of the Sun so the sunlight is definitely between it and Earth. A satellite within position wouldn't be in a position to keep in touch with Earth. The excessively stable fourth and fifth Lagrange things come in Earth’s orbital course around the sunlight, 60 degrees ahead of and behind Earth. The double Solar Terrestrial Relations Observatory (STEREO) spacecraft will orbit within 4th and fifth Lagrange points to give a three-dimensional view of the Sun.

The double Solar Terrestrial Relations Observatory (STEREO) spacecraft took these photos of sunspot 1024 on July 5, 2009, during their method to L4 and L5. The perspectives associated with the sunlight from 60 degrees behind (left) and ahead (correct) of Earth’s orbit reveal portions of the Sun’s area that will otherwise be concealed from view. (NASA images courtesy STEREO Science Center.)

Moderate World Orbit

Nearer to the planet earth, satellites in a method Earth orbit move more quickly. Two medium world orbits are significant: the semi-synchronous orbit as well as the Molniya orbit.

Source: earthobservatory.nasa.gov
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