About Barack Obama. The 44th president of the United States, author and the most popular person in the world, Barack Hussein Obama II, has an estimated net worth of $12.2 million.Excluding the $1.4 million in Nobel Prize money he donated to charity and his primary home.he 44th president of the United States, author and the most popular person in the world, Barack Hussein Obama II, has an estimated net worth of $12.2 million. Excluding the $1.4 million in Nobel Prize money he donated to charity and his primary home.
A satellite is an artificial object that is deliberately sent into orbit in space, usually in order to send, receive or bounce back information to different areas of Earth. Artificial satellites are man-made satellites, they differ to natural satellites such as the Moon which orbits Earth and Earth itself which orbits the Sun.
The Global Positioning System (GPS) is a network of about 30 satellites orbiting the Earth at an altitude of 20,000 km. The system was originally developed by the US government for military navigation but now anyone with a GPS device, be it a SatNav, mobile phone or handheld GPS unit, can receive the radio signals that the satellites broadcast. Wherever you are on the planet, at least four GPS satellites are âvisibleâ at any time. Each one transmits information about its position and the current time at regular intervals.