Ultimately, Time Travel is essential for Space Travel

17 04 2011

Long-time readers may note that this blog bounces (veers?) between space-related content and time/temporal physics-related content.  Today, aside from admitting that (not surprisingly) the two topics are primary passions of mine, I’ll tell you why they’re related, and intimately so.

It’s all Einstein’s fault.

After an interstellar trip, a faulty suspended animation chamber reduces an astronaut to an ancient corpse. (From Planet of the Apes; Credit: 20th Century Fox)

Put very simply, according to Relativity: When dealing with events in the universe, it is impossible to separate the distance of space from the passage of time.

This is why astrophysicists and cosmologists speak of actions in the universe occurring and affecting “space-time.”  (Hence the “space-time continuum” that makes such a frequent appearance in sci-fi technobabble.)

What does this mean for us?  Well, in day-to-day experience, not much more than the odd reality that the moon we see is 1 second old.  Similarly, the sun we see is lagging 8 minutes behind us in time.

Why?  Well, it takes the light that bounces off of the surface of the Moon 1 second to cross the 230,000-mile distance between the Earth and Moon to strike the retina of your eye, and it takes 8 minutes for the light that leaves the sun to cross the 93-million mile orbital void to get to Earth and reach your eye.  As a result, we see the Moon and Sun as they appeared when the light left them, not when the light reaches us.

The same can be said of distant stars.  The farther away a star is, the older it is. (Even if it’s 200,000 light years away – then you’re seeing it the way it looked 200,000 years ago.)

So, quizzically, yes – this means that universe we see is actually a horrible garble of apparent objects from intermixed times.  Fortunately for us,  compared to the incredible speed of light, we’re close enough (distance) to everything we need to experience, (e.g., our limbs, food, loved ones, walls, etc.,) so that this time lag is unnoticeable.

But when we start peering out into the rest of the cosmos, this distortion really matters.  Many of the stars we’re studying may have already exploded… but if they exploded a few years ago, we won’t know it until light from the explosion reaches us, which could take millions of years if the star is far away.

Now, let’s take our time-distance thought exercises a step farther and ask what happens if we score the holy grail of the Search for Extraterrestrial Intelligence.  What if, for the sake of argument, we receive and translate a friendly message from an incredibly advanced race of aliens?  And what if, by fortuitous happenstance, they (hoping to aid other, younger life-forms) offer unlimited knowledge to any beings that can meet them on their world, face-to-face?  Well, the offer doesn’t do us more than a hill of beans of good if it takes us 200 years for a multi-generational craft to get there, only to find that the benevolent race has gone extinct due to a problem with their parent star.  We want to reach them as soon as we translate the message.

We want to separate the distance of space from the passage of time.

So, if we can conceptually and technologically conquer time travel, we will have in essence conquered space travel.  If one can manipulate the passage of time, then the time taken to cross the distance of space with any type of propulsion system becomes an almost trivial tally – little more significant than the miles-per-gallon of a modern automobile.

Conventional propulsion systems will get us around in space for the foreseeable future, and more exotic systems will likely take us to the nearest stars.  However, I believe it will be the mastery of time that will transform our race from provincial planet-hoppers to truly savvy, galaxy-trotting, cosmic-colonial game-changers.

Something to think about.

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Proposing an Antimatter Hazard Symbol

6 05 2010

Proposed Antimatter Hazard Symbol. Credit: Me

As the most potent potential fuel we are familiar with at this stage in our development as a civilization, I think it’s time we talk about getting serious about Antimatter.

For those unfamiliar, Antimatter is atomically identical to normal matter, but electrically (and subatomically) backward.  Electrons become positrons, and protons become anti-protons, particles with opposite electrical charges.  (Think of flipping over the batteries in your remote control, so the “plus” side is now the “minus.”)  Anyway, when matter and antimatter interact, they are both completely anihillated and converted to pure energy in a release that makes nuclear warheads quake in their boots.  (Gene Roddenberry had it right 40 years ago when he powered his fictional interstellar craft with it.)

To this day, Antimatter is the only thing we know of that could power inter-star-system or galactic space transportation technology, real or imagined, and get the job done in a practical amount of time, (read: a single human lifetime).

This brings us to the present, where I currently find myself buried in 10 CFR 835 federal regulations for work.  They’re the regulations our government has put into place to protect workers and the public from sources of radiation and properly warn them of areas of radiation and radioactive contamination.  These rules relate heavily to symbology and the implementation of the familiar yellow-and-black radiation symbol.

You can see where this is going.  Should we decide to seriously consider Antimatter as the fuel (read: energy storage) source that it has the potential to be, we are going to need to seriously consider warning people about it.  The first step is creating a hazard identity.

There have been a couple of attempts at an Antimatter Hazard Symbol floating around the web, but I haven’t found that they adequately address the risks nor do they necessarily coincide with accepted symbology.  Why not start with something familiar?  I think the radiation tre-foil is panic-inducing enough to serve as an acceptable starting point…

So, the thought evolution of my proposed antimatter symbol is simple:

  • The trefoil already represents radiative energy from a point, so why not start there?  It’s already internationally recognizable.
  • Instead of one point in the symbol center, use two overlapping inverted-color circles, representing the interaction of matter and antimatter.
  • Instead of solid trefoil blades, bisect them to provide the visual appearance of even more energy released than radioactive matter.
  • Instead of yellow, a warning color, use red, a color associated with grave danger or death.  The background color doesn’t matter so much, as long as it provides a high contrast with the red.  I like navy, violet, or black.

And there you go.  People will get it, even if they aren’t specifically familiar.  It immediately looks like a radiation symbol, only worse.  Stay away.  Find someone who has proper instrumentation and knowhow before you start messing with whatever you’ve got in your hands with this symbol on it.

UPDATE 04/2012: For more info and subsequent uses of the symbol, click here!

Thoughts, anyone?

Better in black? (reader-suggested)

Second, modified example: (feel free to use any of these in your own projects/work!)

Credit: Ben McGee








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