There are many potential answers to this. It depends on what you classify as an "object". Some would say the answer is the Great Wall of China.
3.0carat is the largest
a man made satellite is a satellite made by man, and sent into space to orbit around a planet, star, or other body in any solar system to gather information and pictures about it.
Yo man
The tallest man-made object is a building, the Burq Dubaiin the United Arab Emirates.The tallest natural point is Mount Everest, in the Himalayas of Nepal.(There are some mountains in South America that because of the bulge of the Earth are farther from the Earth's center, but not from the surface.)
wood made by man!
the goose by Hughes
http://chasteland.blogspot.com/2009/09/longest-man-made-object-on-earth.html
in florida
The furthest man-made object from Earth is space probe Voyager 1,launched 1977.It is,as of May 9,2011,about 17,300,000,000km from the Sun.
The largest man made object ever moved was the Troll oil platform in 1996 in Norway. its 250 tons
The first man made object put into Earth orbit.
The Great Wall of China is so famous because it is the largest man made object on Earth and is the only building visible from outer space
probs Pisa or the Eiffel tower
There are currently no man-made objects visible from the moon, not even the Great Wall of China (see link below)Here is a quote from Astronaut Alan Bean (Apollo 12)..."The only thing you can see from the moon is a beautiful sphere, mostly white (clouds), some blue (ocean), patches of yellow (deserts), and every once in a while some green vegetation. No man-made object is visible on this scale. In fact, when first leaving earth's orbit and only a few thousand miles away, no man-made object is visible at that point either."The largest and only man made object to be visible to Neil Armstrong and for the matter any human would be THE GREAT WALL OF CHINA.For nothing else is visible to the naked eye.
The first man-made object to circle the Earth in 1957 was the Soviet satellite Sputnik 1. It was launched on October 4, 1957, and marked the beginning of the space age.
The International Space Station (ISS) is the largest man-made object in space. It orbits Earth and serves as a microgravity and space environment research laboratory where astronauts conduct experiments in various fields.
One man-made object that orbits the sun is the International Space Station (ISS). It orbits Earth at an average altitude of approximately 420 kilometers (260 miles) and travels around the Earth about every 90 minutes.