Can we go to the deepest sea using a spacecraft?
493625
No.\n\nSpacecraft are designed specifically to perform in the vacuum of space thereby keeping the atmospheric pressure inside from getting out.\n\nDeep sea craft are designed exactly the opposite.  They try to keep the tremendous pressure of the water from getting in.
340102
I read all the answers and chewed over what ZAHIER had to say...as you know we are unable to leave earth to travel into deep space with out first using our gravity to gain speed and break away from our own gravity pull.... NO we cant at this time travel in a straight line into space, gravity will alter your course creating curves.
881198
Of course you can.  Ceres would actually be a fairly good starting place to take material from as the energy required to loft something off Ceres would be much less than doing it from Earth (though not as good as from our moon, however).\n\nThe limitations of Ceres, however, is that since it is further from the Sun than we are, you cannot get as much free energy using solar panels as you could from the moon.  And then, there is the issue of where you want to position your settlement.  Since you write that you want it in the asteroid belt itself, I assume this is for mining asteroids.  And the problem is that the asteroid belt is huge, since it goes around the sun past the orbit of Mars, and that it has much less material in it than Mars (of course, Mars material is mostly deep, while asteroid are smaller) but the real thing is that asteroid mining operation would involve a lot of travelling, and that would make it rather slow.  There may be a lot of rocks, but they are far from one another, this is NOT a crowded area, and collisions between asteroids are extremely rare.\n\nIn the end, it is a matter of describing what your settlement is for, that dictates a lot of the orbital characteristics, and from that, the choices that could be made to make it as effectively as possible.\n\nAs to how to orbit something from Ceres, with an escape velocity of 0.51 km/s -- almost one fifth that of the moon -- comparatively small rockets is all you'd need.
1043804
For human beings to fly solo? :)\nIt may seen very science-fictiony but hopefully, one day we will create a backpack-like device which will allow us to individually fly here and there.\n\nOn the other end of the scale, humans have yet to discover what is at the VERY deep end of the dark oceans...and I'm sure that there are many creatures there we have not discovered yet.
107320
Well,one possible way,in the disntant future,we may be able to make wormholes.This is a shortcut through space and time in which we could get to the moon extremely quickly.Picture a flat piece of paper.If there are dots on both sides of the paper,you would think the fastest way is a straight line.But a wormhole means you would fold the paper in half and it would be much quicker to get there.The two dots are right next to each other.That path would be a wormhole.It's a lot easier to see rather than write,but thats basically it.
239819
Yes the heat is because the shuttle is going about 17,000 mph or more.  But think about it... if we caused it to slow down to the earth's rotational speed, it would drop like a stone!  The shuttle is very non-aerodynamic, it's like flying a brick with small wings.  Without the speed, it would be impossible to maneuver it to base because after entering the atmosphere it's like a big clumsy glider.\n\nIf we were to glide in gently under power like a jet, it would have to be much more aerodynamic. So it's possible, and the people working on the X prize are doing just that.  \n\nBut you will not find nuclear energy on a spaceship any time soon.  The safety concerns of a nuclear reactor blowing up in our atmosphere and scattering radioactive dust are too great to allow for such a thing.
161866
There have been several technical papers published over the last few years using coulomb force (electrostatic propulsion) to control the distance between satellites in formation flying.  \n\nUnfortunately, you can't generate anything but very small thrusts using this method (0.005 lbs thrust), since larger electric fields cause discharge between electric components in the satellite.  This limts the effectiveness to maybe 100m with very small satellites.  Even trying to insulate a satellite or spacecraft to generate a higher charge won't work, since a large enough electric feld would exceed the breakdown voltage of any insulator we have.  The additional weight will also reduce the effectiveness of the electrostaic propulsion.\n\nFinally, in any type of plasma field (such as that around the Earth), the electrostatic charge field strength drops off very quickly according to the Debye length, typically about 6 cm.  \n\nYou might try using some type of magnetic field, but not all planets have a strong magnetic filed, and it needs to be mapped out well in order to be able to control the spacecraft.  Planetary magnetics fields are fairly inconsistent.
785087
We cannot leave our solar system until we figure out how to travel at much higher speeds than we can now.  Even if we could travel at 1/2 of light speed, it would still take 8 years to get to the nearest star.  The crew would have very little to do during the voyage.  And, they'd have to carry supplies for the 16-year round trip.  The ship would be enormous -- certainly larger than anything we have ever built.\n\nUntil we can find a way to travel at speeds faster than light, we will not be able to visit other star systems.
2938
The Marianas trench is the deepest part of the ocean.  It is 35,813 ft/10,915m deep.  If you cut Mount Everest off at sea level and put it on the ocean bottom in the Challenger Deep, there would still be over a mile of water over the top of it!
166753
its the deepest point on earth !! Actually under sea
126942
Not anytime soon, no. First, we have to send people back to the moon and then do manned missions to Mars before we can go that far into the solar system!
713689
Yes, we have the technology to do this now.  What's holding us back is the cost, not the tech.\n\nThe trip would be about six months each way using the engines we have now and gravity assists where possible.  The most likely scenario would be to first launch a series of un-manned "provision" ships to land on Mars or perhaps orbit it -- these would contain food, water, and fuel.  Once we had verified that they were safely at their destination, we would launch the manned ship -- which would carry enough provisions for a one-way trip, and upon arrival at Mars re-stock from the earlier unmanned ships and then return to Earth.  \nWe *could* fully provision a ship for a round-trip, but doing so makes the manned craft much larger and expensive, and lacks the backup of additional supplies existing at the destination.\n\nAll of this is already on NASA's drawing boards, though whether it will ever happen or not is completely a matter of $$ :)
1030915
Challenger Deep in the Mariana Trench is the deepest point in the ocean. Measurements varying from 35,797 to 35,838 feet have been taken.
453743
To allow any astronauts  on board to breathe, the cabin would be be pressurized with a breathable atmosphere.  This internal pressure would be greater than the (very tiny) pressure outside the spacecraft.  And just like increasing the pressure inside a balloon by blowing into it causes it to expand, this increased pressure inside the spacecraft would, if there was a catastrophic failure of some kind, cause the space craft to explode rather than implode.  The exact opposite happens to submarines that are deep underwater.  If something happens to a submarine at depth, it will implode as the pressure of the water around it is greater than the pressure of the interior spaces.
508406
rekn may be right, but from what information we have, including satellite surveys, the deepest knows ocean is the pacific ocean with an average depth of 4270 m (14000 ft). the deepest point on the pacific is the mariana trench at 10 911 metres (35,797 ft) below sea level, it is also the deepest know point on the surface of earth
628521
I would think it would be the depths of the oceans up to about 5 miles into the atmosphere around the entire earth
1152082
10,916 meters (35,814 feet), to Challenger Deep in the Marianas trench, which is the deepest known part of the Earth's oceans.  The Marianas trench is in the western north Pacific Ocean.  \n\nSee sources.