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Why is most space exploration accomplished with spacecraft without astronauts?
The most obvious answer to your question is the fact that people have to return to earth, while an unmanned craft can stay in space infinitely. Manned spacecraft require things like oxygen, water, food and communications equipment, none of which are required by an unmanned spacecraft. That means unmanned spacecrafts can be sent into space for a fraction of the cost of a manned spacecraft. So basically, it's much cheaper and safer to send unmanned spacecrafts to explore the universe.
Where have unmanned space probes been sent?
Unmanned space probes in the early years of the Space Race have been sent to close to planets like Saturn, Uranus, and Neptune.
How did the Russians track the flight to the moon?
The Russian sent a unmanned spacecraft to the moon, a few days earlier to the Apollo 11 launch. It was to track it.
Human explorations on Mercury?
Humans have sent space probes to take pictures of Mercury from orbit around the planet, but we have not sent a man to Mercury. Sending people to Mercury would be hard because it is so dangerously close to the sun.
How many missions have been sent into space?
To date there have been 282 manned missions sent into space and more than 1000 unmanned missions.
What probes have been sent to mercury?
The space probe Mariner 10 has been sent to Mercury. Currently the unmanned space probe MESSANGER is photographing and studying Mercury.
What are the different space probes and their mission?
A space probe is an unmanned spacecraft sent into space.
Has there been space travel to planet mercury?
Yes, NASA has sent a couple of unmanned probes to examine Mercury, Mariner 10 which did a flyby and the MESSENGER orbiter.
Why is most space exploration accomplished with spacecraft without astronauts?
The most obvious answer to your question is the fact that people have to return to earth, while an unmanned craft can stay in space infinitely. Manned spacecraft require things like oxygen, water, food and communications equipment, none of which are required by an unmanned spacecraft. That means unmanned spacecrafts can be sent into space for a fraction of the cost of a manned spacecraft. So basically, it's much cheaper and safer to send unmanned spacecrafts to explore the universe.
Has Nasa sent spacecraft to mercury?
no u smell like cheese
What are the four us spacecrafts that have been sent to mercury?
You seem to be misinformed. The first US spacecraft was Mariner 10. This was followed by Messenger. There have not been others.
Where have unmanned space probes been sent?
Unmanned space probes in the early years of the Space Race have been sent to close to planets like Saturn, Uranus, and Neptune.
How did the Russians track the flight to the moon?
The Russian sent a unmanned spacecraft to the moon, a few days earlier to the Apollo 11 launch. It was to track it.
What is the name of the spacecraft that that went to Mercury and sent pictures back?
There were two: Mariner 10 and Messenger.
Has any human-made devices been on Mercury?
No. Because of its proximity to the Sun, Mercury is one of the least-studied planets - because terrestrial observations are so difficult. Only two spacecraft have studied Mercury; the Mariner 10 and the more recent Messenger. No landers have been sent there.
How many countries have had missions to the moon when did these countries travel to the moon?
As far as has been made known to the public, the USA is the only country which so far has landedhuman beings on the moon and returned them safely to earth.The USSR has sent unmanned spacecraft around the moon and back to earth, and has crashedan unmanned vehicle onto the moon's surface.
Human explorations on Mercury?
Humans have sent space probes to take pictures of Mercury from orbit around the planet, but we have not sent a man to Mercury. Sending people to Mercury would be hard because it is so dangerously close to the sun.
