Here you will find Meteorites Tektites and Moldavite for sale at the best price. A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the Earth’s atmosphere and impact with the Earth’s surface or that of another planet. When the object enters the atmosphere, various factors like friction, pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate that energy. It then becomes a meteor and forms a fireball, also known as a shooting/falling star; astronomers call the brightest examples “bolides”. Meteorites that survive atmospheric entry and impact vary greatly in size. For geologists, a bolide is a meteorite large enough to create a crater.
Professor Oliver advised us that the White hot glow of the shooting star is caused by the meteor pressure wave which heats up the air in front of the meteor. When air pressure increases the temperature also increases (Charles and Boyles laws). This pressure wave sits about 1/2 an inch in front and the heat is radiated back to the meteor surface. Just think that meteor is traveling at millions of kilometers per hour and starts at the temperature of -273 degrees Celsius. Behind the meteor the opposite happens and the pressure is reduced and temperature also reduced, on earth these conditions create cavitation. When the meteorite hits the ground it is usually freezing cold. Very interesting information.