The U.S. military was the first to develop and use GPS technology in the 1970s for navigation and positioning purposes. It was later made available for civilian use in the 1980s.

Devices such as telecommunications satellites, weather satellites, and broadcasting satellites rely on geostationary orbits to provide continuous coverage over a specific region on Earth. This allows for consistent and reliable communication, weather monitoring, and broadcasting services.

Satellites can slow down due to atmospheric drag, solar radiation pressure, and gravitational forces from other celestial bodies. Atmospheric drag causes friction as the satellite moves through the Earth's atmosphere, slowing it down over time. Solar radiation pressure and gravitational forces can also influence a satellite's speed, altering its trajectory.

It's possible because the orbital period only depends on the satellite's distance from the center of the Earth, not its height above the Earth's surface. As long as the two satellites have the same distance from the center of the Earth, they will have the same orbital period even if their heights above the Earth's surface are different.

The first satellite to reach a retrograde orbit was Explorer 8, launched by the United States in 1960. It was the first satellite to intentionally be placed in a polar orbit, which is a type of retrograde orbit.

You can find a list of satellites launched by Russia on websites such as n2yo.com or celestrak.com. These websites provide real-time tracking information for satellites in orbit, including those launched by Russia.

One obvious one...it's the moon! There are however, several other large objects orbiting the earth and a 6th apart from the moon and the other four has been recently discovered. Capture by gravity by the earth of a new satellite is almost impossible. There would have to be specific forces (usually friction from dust, or perhaps the moons gravitational pull) that would allow for a new object to begin orbiting the Earth.

New smaller objects may appear and disappear, but the Moon will be Earth's only long term companion for quite some time. Eventually, however, it too will be lost. Currently, Luna is moving away from the earth at a rate of about two inches per year.

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Polar satellites are sometimes referred to as "Detective satellites" because they orbit the Earth from pole to pole, allowing them to view the entire planet with each revolution. This enables them to detect and monitor changes in the Earth's atmosphere, weather patterns, and environmental conditions on a global scale, providing valuable data for scientific research and practical applications.

The two main types of satellite orbits are geostationary orbit, where satellites remain fixed above a particular point on the Earth's surface, and low Earth orbit, where satellites orbit at lower altitudes and travel faster around the Earth.

The Moon is, sometimes, used as a natural reflector for radio signals. The problem is that the surface of the Moon is so rough and uneven that most of the signal scatters back into space instead of bouncing back to Earth.

Another reason is that the Moon can only reflect signals. Modern communications satellites actively rebroadcast the signal back to Earth.

And finally, the Moon is only available for half of the day, and it keeps moving. Modern satellites in geosynchronous orbit appear to hang motionless in the sky, so your Earth-based antenna doesn't have to move to track it. To use the Moon as a reflector, you would need motors and tracking mechanisms to slew the dish to point at the Moon. The cost of the tracking mechanisms would certainly be over $100 each. $100 per dish times how many satellite dishes are there? and pretty soon putting a satellite in geosynch looks like the lower-cost option.

Meteorologists use various tools and technologies such as satellites, radar, weather balloons, and computer models to predict the weather. They analyze data from these sources to make forecasts and predict future weather patterns.

Geosynchronous satellites orbit the Earth at the same rate that the Earth rotates, so they appear to remain stationary relative to a fixed point on the Earth's surface. This allows them to provide continuous coverage and communication services to specific areas on Earth. They are typically positioned in the geostationary orbit, which is 35,786 kilometers above the equator.

No satellite has left our solar system. The farthest human-made object from Earth is the Voyager 1 spacecraft, which has entered interstellar space but is still within the boundary of our solar system.

It is estimated that there are over 9,000 tons of space debris currently in orbit around Earth, consisting of discarded rockets, defunct satellites, and fragments from collisions. These objects pose a risk to operational satellites and spacecraft in orbit. Multiple organizations are working on developing solutions to mitigate the issue of space debris.

The period of a satellite is the time it takes for the satellite to complete one orbit around its parent body, such as a planet or a star. It is typically measured in hours, days, or years depending on the size and speed of the satellite's orbit. The period is determined by the satellite's orbital velocity and the mass of the parent body it is orbiting.

Edwin Hubble did not invent the telescope. He was an astronomer who used telescopes to make significant discoveries, such as the expansion of the universe. The telescope has been around for centuries before Hubble's time.

Satellites have enabled various discoveries, such as mapping Earth's surface, monitoring weather patterns, tracking climate change, studying the atmosphere and oceans, observing wildlife migrations, and aiding in disaster response and management. They have also revolutionized communication, navigation, and scientific research.

Artificial satellites orbiting Earth are man-made objects launched into space for various purposes such as communication, weather monitoring, navigation, and scientific research. They can be either in geostationary or low Earth orbit, and examples include the Hubble Space Telescope, GPS satellites, and communications satellites.

Satellites can take pictures as frequently as every few minutes to once every few days, depending on the satellite's orbit, purpose, and imaging capabilities. Some satellites may be tasked to capture images at specific intervals while others may have more flexible scheduling.

One difference is that satellites are man-made objects launched into space for various purposes, such as communication, weather forecasting, and navigation. Electrons, on the other hand, are fundamental particles that make up atoms and carry a negative electric charge.

Halley's comet travels regularly because it follows an elliptical orbit around the sun. This orbit takes approximately 76 years to complete, resulting in periodic appearances from Earth's perspective. The gravitational influence from the planets helps maintain the comet's orbit.

Syncom 2 was launched in 1963, the worlds first geo synchronous satellite. These are special types of satellites that are launched much further out into higher orbit around the earth. The greater the distance from earth, the longer it takes for the satellite to orbit. You eventually get to a special distance where the time taken to orbit is equal to one day, the same as one spin of the earth, so the satellite can effectively hold a position relative to the surface of the earth. This means they can be easily tracked with stationary satellite dishes.

Some historical events that have coincided with sightings of Halley's Comet include the Norman Conquest of England in 1066, the Black Death pandemic in 1348-1349, and the Great Fire of London in 1666. The comet is famously associated with events of significance due to its periodic return to the inner Solar System approximately every 75-76 years.

Edmond Halley.

Some popular satellite names include Hubble, ISS (International Space Station), GOES (Geostationary Operational Environmental Satellite), and Landsat. These satellites serve various purposes such as astronomical observation, Earth monitoring, and communication.