21times
...
about 33 with 3 on each mission
Yes, the Voyager missions were run by NASA and they sent the probes.
Mercury was the name given to the first American space program.
Yes they have. The Americans and Soviets used to be competitors in space travel during the Cold War, but once the Cold War ended so did the Space Race. Americans and Soviet have flown into space together and completed many missions together. Currently, the US will rely on Russia for transporting American astronauts into space as NASA shut this program down due to financial cut backs.
the first program to send Americans into space was called "project mercury"
I'm guessing rocket fuel (or as Americans say it, gas)
Space. There are lots of different "cooperative missions" planned; you'd need to be more specific.
The manned space program is just what it says. It's a program to send humans into space. Unmanned vehicles have the advantage in that they don't have to return to earth. That means they can go further and stay in space indefinitely. Manned missions however, need to return its cargo back to earth. Manned missions have the advantage in that if something goes wrong, they can usually fix it in space. If something breaks on an unmanned mission, they simply send up another spacecraft. Manned missions also have the added advantage in that people can observe things in space, while unmanned missions simply obey commands from their earth based masters.
The manned space program is just what it says. It's a program to send humans into space. Unmanned vehicles have the advantage in that they don't have to return to earth. That means they can go further and stay in space indefinitely. Manned missions however, need to return its cargo back to earth. Manned missions have the advantage in that if something goes wrong, they can usually fix it in space. If something breaks on an unmanned mission, they simply send up another spacecraft. Manned missions also have the added advantage in that people can observe things in space, while unmanned missions simply obey commands from their earth based masters.
We should send space probe just like New Horizons Spacecraft to Eris. So we can launch this spacecraft in 2015 to make Jupiter, Saturn, and Neptune flybys then to Eris.
Scientists send uncrewed missions to space primarily to explore environments that are too harsh or distant for humans to safely navigate. These missions allow for cost-effective data collection, minimizing risks to human life while gathering valuable information about celestial bodies, atmospheric conditions, and potential resources. Additionally, uncrewed missions can operate for extended periods and reach destinations that may be impractical for crewed missions, thus expanding our understanding of the universe.