Space travel Definition and 118 Threads

Space-A travel is a means by which members of United States Uniformed Services (United States Military, reservists and retirees, United States Department of Defense civilian personnel under certain circumstances), and these groups' family members, are permitted to travel on aircraft under the jurisdiction of the United States Department of Defense when excess capability allows.

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  1. DaveC426913

    How Does Time Dilation Affect Subjective Travel Times in Space?

    Many short story ideas I have involve space travel. I'm looking at the Lorentz transform formula and scratching my head. Is there a relatively straightforward way to use the time dilation formulae and calculate subjective travel times for space travel? Presume a spaceship accelerates at...
  2. C

    Can Relativity Explain the Possibility of Aliens Visiting Earth?

    This question might not belong in this category, and it may seem a bit of an out there question also... Based on the principals of relativity, if aliens are real (that i hope so), wouldn’t they come back to their planet far into the future after visiting our own planet?? I ask this because they...
  3. N

    Exploring the Possibility of Aerospace Engineering Jobs for Space Travel

    I was just wondering what kind of jobs that people have gotten with Aerospace Engineering... I would like to get a research and development job when I get out with at least my masters, although I might go ahead and get my Doctorate. What my ultimate goal is to be able to make traveling in space...
  4. S

    Questions on space travel for a sci-fi story

    Sci-fi writer looking for help Hello everyone. I am working on some ideas for a new science fiction comic... more of a space opera really. I'm not a cosmologist or even a physicist, but I actually can understand (or at least grasp) about half of what I've read on the subject. I am hoping...
  5. C

    Can Space Travel Faster Than the Speed of Light?

    Greetings, I was watching a video lecture by Alex Filipenko of Berkeley's Astronomy Dept. and I was shocked to hear him say that space can travel faster than C, because Relativity doesn't put contraints on the speed of space itself. Does anyone have any insight on this for me please? I'm...
  6. magi

    Space Travel: Time Dilation at Near Light Speed Explained

    Space travel again :) Ciao. Time slows down when traveling close to light speed. So my question is. I travel out in space to a distant star, accelerating close to light speed. When i have traveled for 10 years, my time and on Earth 300 years have past. Have I traveled nearly 10...
  7. T

    Space Travel: How Do Spaceships Move?

    OK to my knowledge everything moves by using friction,or pushing off of something but how would say a spaceship move, i know that I am over looking somthing very obvious but I am just not sure what it is.
  8. D

    Space Travel n size of traveller

    What do u think? There is 3 category. 1. Species which size bigger than us. 2. Species which have the same size as us. 3. Species which is smaller than us. Assuming all of the kinds have the same intelligence as us, living in different world, wish same Earth like environment. Which...
  9. C

    Oort Cloud Treat to Interstellar Space Travel

    A few quotes from various sources suggest there is quite a bit of material in the Oort Cloud, maybe enough to threaten interstellar space travel: “The Oort cloud is an immense spherical cloud surrounding the planetary system and extending approximately 3 light years, about 30 trillion...
  10. F

    Finding a Formula for Determining G Forces in Space Travel

    Hello. :smile: I'm currently looking for a formula that would determine the G forces that a spaceship (and the people in it) would suffer whilst in it's travels. The current formula being used takes acceleration of the ship into account, but not a planet's. Therefore, even though I'm...
  11. T

    Exploring the Risks of Space Travel

    This is about the dangers of space travel. I would be interested to find out what other people think about them.
  12. Ivan Seeking

    A traveling-wave engine to power deep space travel

    http://www.eurekalert.org/pub_releases/2004-09/danl-ate091604.php
  13. M

    Relativistic Space Travel: Fact or Fiction?

    There have be several threads discussing aspects of space travel and how relativistic effects could be utilised to enable travel to other stars in reasonable experienced elapsed times. I want to describe and utilise such spaceships in my science fiction writing whilst resorting to as few...
  14. M

    Simple Space Travel: Can Magnets Help?

    Ok, I am not the kind of person who likes BIG words, so this is all going to be simple. My question is this, what would happen in you polarized the haul of a spaceship say negitive(Doesn't really matter if its neg or pos), then generated an opposite field of energy behind. It would act like...
  15. B

    Relativity and space travel - what's the problem?

    it seems to me that relativity (or at least the constant, impassable c) has had a stifling effect on science fiction and on our conceptualizations of space travel...i think the popular notion is that, because nothing can move faster than c, even with very advanced technology most of the galaxy...
  16. Nibles

    Can we reach Mars using thrusters and maintain a constant velocity?

    It's my understanding that everything in space is in some sort of "free fall", which is pretty much what an orbit is. So, if you were in a spaceship and applied some thrusters, you are pretty much changing the orientation and speed of your "free fall", right? So, let's say I wanted to get to...
  17. FZ+

    Is Manned Space Travel More Beneficial Than Robot-Controlled Missions?

    This is a continuation of the why space travel thread. Try to keep the discussion over there, ok?
  18. I

    Exploring the Benefits of Space Travel: Questions & Answers

    I never understood space programs and the need of NASA. Someone help me. What is the point of spending billions of dollars to get an expensive craft out of Earth and various space programs? What is water exists on Mars? What is we find living organisms on other planets? Shouldn't the U.S. and...
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