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Do You Know
Questions & Answers on General Knowledge.

Question:
What does a satellite do?
Answer:
A satellite is any body or object that moves around another; for example, the Moon is a satellite of Earth. But when most scientists use the word “satellite” they are referring to a man-made object that orbits Earth and collects and returns data. A single satellite may serve many purposes. Satellites can be used for weather forecasts by measuring clouds, winds, and the temperature of the atmosphere from space. They are also used in military contexts to track battle zones, watch for missile launches and nuclear testing, spy on countries, and track incoming objects like meteoroids. Satellites also send television programs and telephone calls from one continent to another. The first Global Positioning Satellite (GPS) was launched on November 22, 1978, and today GPS is the standard navigation tool used by the military, scientists, and industry. Space satellites are used for learning about the universe, including how the Sun and Earth interact and details about planets.
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  • Benefits of Lemon

    Boosts Your Immune System

    Lemons are high in vitamin C, which is great for fighting colds. They?re high in potassium, which stimulates brain and nerve function. Potassium also helps control blood pressure. Ascorbic acid (vitamin C) found in lemons demonstrates anti-inflammatory effects, and is used as complementary support for asthma and other respiratory symptoms plus it enhances iron absorption in the body; iron plays an important role in immune function. Lemons also contain saponins, which show antimicrobial properties that may help keep cold and flu at bay. Lemons also reduce the amount of phlegm produced by the body.


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