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Questions tagged [travel]

Questions related to any kinds of travel where entering space is involved.

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Can astronomy use the black hole at the center of the Milly way as true south on a space compass? [on hold]

Can astronomy use the black hole at the center of the Milly way as true south on a space compass? As far as space travel is concerned they claim to not use any space compass. Would this be a good ...
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2answers
93 views

At what point of a standard transition from Earth to Mars do both planets have the same apparent magnitude, and what's its value?

Apparent magnitude is meant with respect to the crew of the vehicle. For the trajectory, please pick any that can be considered normal. Also, it would be nice to have comparisons with other objects ...
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1answer
88 views

Would it be possible to reach Mars using the same fuel-saving method SpaceIL's Beresheet is using?

A few minutes before SpaceIL's Beresheet spacecraft was launched into space, Israeli prime minister Netanyahu congratulated SpaceIL and all those involved and said: "We are already waiting for you to ...
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3answers
1k views

What is the fastest rover that has ever traveled on the surface of an extra-terrestrial body?

What is the fastest rover currently moving on the surface of another celestial body? At what speed with our technology currently does physics restrict our speed limits on the surfaces of solar system ...
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4answers
1k views

What is the fastest can we or have ever traveled in space?

What is the fastest vehicle currently in space? At what speed with our technology currently does physics restrict our speed limits in space?
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1answer
189 views

Could a spacecraft be put into such an orbit that it would alternately slingshot around Mars and the Earth?

I was wondering if a spacecraft could be put into such an orbit that it would alternately slingshot around Mars and the Earth. This way it it would be making a continuous trip from Earth to Mars and ...
7
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2answers
285 views

Using asteroids as propellent source

if we could capture an asteroid or meteor, can we use it as a vehicle for space travel? From what I understand, propulsion is a result of mass flow, so we could use a rail gun configuration to propel ...
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1answer
80 views

How far did the Mars Polar Lander travel?

How far did the Mars Polar Lander travel in its journey to the red planet? I couldn't find the answer on Wikipedia or on the official NASA site. I'd prefer some answer based on a good source, or ...
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1answer
100 views

Current biggest challenge [closed]

What is regarded as the current single biggest challenge/hurdle limiting space exploration? Once that tipping point has past it would pave the way for future exploration to dramatically increase.
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0answers
90 views

Are destination coordinates sufficient to travel to a far place?

Imagine we want to go to Alpha Centauri, Let's assume we are at position {100, 100, 100} and the star is at position ...
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5answers
464 views

How might Earth's location be referenced in stellar terms?

Apologies if this has been asked before using terminology for somebody more familiar with the subject matter. I've searched but cannot find an answer. Assuming space travel was possible (to other ...
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1answer
135 views

What would happen to communication if we stayed in contact with a person going to mars?

If we talk to a person on mars it would take about 30 minutes before they would see the communication, but lets say we stayed in contact 24/7 by video calling starting from Earth, what would happen? ...
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1answer
400 views

I've designed a machine that can propel a craft through space accelerating 8000mph every 24 hours. Who do I talk to about it? [closed]

I have three ideas but one of them a lot more efficient than the other two. I also have a few questions that need to be tested in space or dismissed by a astrophysicist, My main question: If a ...
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2answers
1k views

Do we travel horizontally in same plane or vertically while exploring space? [closed]

While looking from Earth's surface it gives the impression that all planets, stars, sun etc are above our heads. When a rocket travels from earth to outer space, it takes a trajectory and gives the ...
1
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1answer
447 views

Which is the longest distance traveled by a space craft?

Which is the longest distance traveled by a space craft? Manned or unmanned? I believe it's Voyager, but I am not sure about the distance it traveled or is still traveling. I believe the mission ...
3
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6answers
464 views

Can a launch of a rocket or ship from Earth go so badly that it damages the Solar System?

Is it possible for a launch of a space object originating from Earth to go so badly that it would cause permanent damage to the Solar System or even destroy it? Example: a spaceship going off ...
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2answers
1k views

How much gravity is actually needed to avoid serious health consequences?

Most discussion I have read about using tethers and rotation in order to simulate gravity on spacecraft, talk about simulating Earth's gravity - 1g or 9.8m/s^2. Baked into the 1g figure is the ...
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3answers
1k views

Mechanically propelled spaceship?

Is it possible to have some sort of a spaceship that basically runs on electricity and "butt kicks" itself forward? Or would it stand still because every force has an equal force in the opposite ...
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1answer
2k views

What is the amount of force needed to move an object in space?

Consider an object placed in space, where there is no gravity. What is the amount of force needed to move the object by one unit length? How does that relate to the mass of the object and the time ...
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2answers
116 views

Increasing the earth's distance from the sun with only the sun's photons as a force [duplicate]

What would be the best way to move the earth if possible by human intervention via only using photons from the sun as a means of momentum force to move earth.Even a mile would be considered success so ...
26
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2answers
64k views

What is the fastest speed ever reached in space travel as measured from the point in space from which it was launched to its current/final position?

Answers.com lists the New Horizons to have the fastest rocket. Is this info still valid? 7 light hours in 11 years at 50,000 km/h?
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1answer
80 views

Kinematics help

If a constant acceleration starship started at rest, then accelerated at 25G (245m/s^2) how long would it take to fly an AU (149 597 871 kilometers)? I am a writer, so I have no experience with ...
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3answers
2k views

If the Alcubierre Warp Drive was used to travel to Alpha Centauri, how much time would pass on Earth?

If the Alcubierre Warp Drive was used to travel to Alpha Centauri, how much time would pass on Earth? Per this article, it would take merely days to travel there. Say a ship travels there, spends a ...
12
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1answer
1k views

How many companies are active in commercial space exploration [closed]

One of my dreams is to go into space. I believe that humanity is headed in such a direction that before I die (in the next 60-80 years) I should be able to pay for a ticket into orbit, or even to the ...
8
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1answer
546 views

How serious is a contagion in space flight?

Today I was playing Alien: Isolation and saw a poster regarding lice and how you ought to get checked to reduce the risk of spreading it. (I give you this context to let you know that I am generally ...
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1answer
1k views

Are there any proposals for a permanent orbital interplanetary ferry?

I believe I read in a book once a description of a kind of interplanetary ferry that would orbit the sun and regularly pass different planets like Mars and Earth. The idea of the ferry is to have a ...
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1answer
6k views

Who has been the closest to/furthest from the Sun?

Google couldn't find the answer for me. Technically this is two very closely related questions. Since no person has yet been much further from the Earth than the far side of the Moon I was wondering ...
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3answers
2k views

Space travel: Is there an speed limit lower than speed of light?

Propulsion exhaust speed is lower than speed of light, I think and if it is so, than how could spaceship go faster that exhaust speed? Right? So exhaust speed is a maximum speed for spaceship? (If ...
0
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1answer
579 views

how much does time slow down with gravitational time dilation, on a black hole with these graph trajectories.? [closed]

How much does time slow down with gravitational time dilation, on a black hole with these graph trajectories.? If you watch a journey into a black hole on Youtube before reading this question, it ...
6
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3answers
632 views

Maybe I can't really reach the speed of light, but how close could I get?

Let's say I build a ship, get in it and take off into the dark. When I leave Earth, I measure my acceleration at 1g and my ship is capable of producing that level of power indefinitely. There will be ...
3
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1answer
225 views

Combating negative effects of space

After seeing this article about a skin-tight space suit, I was wondering what were the different ways of combating the negative effect of being in space, e.g. artificial gravity? How far away are ...
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3answers
20k views

How would one go about proving humans have really been to outer space?

Background: I am 40 years old, and in my entire life the only face to face eyewitness event that I can remember where humans actually observed an attempt to fly into outer space, the craft exploded ...
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1answer
2k views

Do we have motion sickness in zero gravity? [duplicate]

In zero gravity, the vestibular system (which is responsible for feeling the balance) doesn't work since the fluids in it don't move properly in absent of significant gravitational force. Does it also ...
14
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3answers
810 views

Horizontal space launch

Space ships are always launched vertically. Its reason is pretty obvious: vertical launch has the lowest distance between the desired height and surface. However, would horizantal launch be worth to ...