What was the heaviest object to be launched into space and which was the vehicle?
342341
I would say the heaviest is the shuttle (one piece one time launch).  the space station went up in pieces. \n\nthe heaviest launch vehicle is the saturn 5
1091336
Things would weigh less than on earth\n\nst
111250
On April 12, 1961 Soviet cosmonaut Yuri Gagarin is the first person to orbit Earth. His flight in Vostok 1 lasts less than 2 hr.
377079
it has the greatest mass
596583
Mass. I think.Depending on how strong the gravity is your mass changes.
195207
It was first living creature to go in space aboard former USSR, launch vehicle.\nIncidently It never came back.
1085800
The first cosmonaut was Yuri Gagarin, who was launched into space on April 12, 1961 aboard Vostok 1.
850664
heaviest element would be Ununoctium (118) or the one with the largest atomic number, but ununoctium only exists for a infinitesimally short time, like the many other heavy elements
565948
The heaviest insect is probably the goliath beetle (Goliathus goliath) of Africa, which is reputed to weigh up to 100 grams (more than a small bird)!
146747
Nothing in space.  It's weightless.
277225
The largest meteorite ever found is the Hoba meteorite of South Africa.  It weighed 60 tons.  The smallest meteorite would be the size of dust or even smaller (depending on whether or not you were using a magnifying glass as a visual aid)
290665
3.45×10^−25 kg = Lead-208 atom, the heaviest stable isotope known\n\ncheck here http://en.wikipedia.org/wiki/Orders_of_magnitude_(mass) good luck
432870
"Scientists using NASA's Rossi X-ray Timing Explorer have estimated the depth of the crust on a neutron star, the densest object known in the universe. The crust, they say, is close to a mile deep and so tightly packed that a teaspoon of this material would weigh about 10 million tons on Earth."\n\nhttp://spaceflightnow.com/news/n0604/24starquake/
1173168
Space Transportation System
541478
More than the first dog, it was the first creature in space.\n\nLaika was launched in 1957 and died in orbit.\n\nFor more information try:\n\nhttp://en.wikipedia.org/wiki/Laika
347348
Aryabhatta was the first satellite sent by India into space.\n\nLaunch Date : April 19, 1975 \nWeight : 360 kg \nLaunched by : Soviet Intercosmos Rocket of Soviet Union
258138
History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a basketball, weighed only 183 pounds, and took about 98 minutes to orbit the Earth on its elliptical path. That launch ushered in new political, military, technological, and scientific developments. While the Sputnik launch was a single event, it marked the start of the space age and the U.S.-U.S.S.R space race. http://history.nasa.gov/sputnik/\n\nThe Gulf of Tonkin Incident was a pair of alleged attacks by North Vietnamese gunboats on two American destroyers, the USS Maddox and the USS C. Turner Joy, in August of 1964 in the Gulf of Tonkin. Later research, including a report released in 2005 by the National Security Agency, indicates that the second attack did not occur.\n\nhttp://en.wikipedia.org/wiki/Gulf_of_Tonkin_Incident