The first man-made object to reach space occurred on October 3rd, 1942 by German scientists during WWII. In the seventy years since, thousands of objects have reached orbit including designated phone and television satellites, weather monitors, and of course astronauts. Many objects served their purpose, but many others malfunctioned or became unresponsive and were left to forever circle the Earth.
Objects currently orbiting the Earth include abandoned satellites, used rockets, fragments of spacecraft, and random debris from past collisions. There are now over 500,000 pieces of space junk zipping around the Earth at over 17,500 miles per hour.