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Interstellar Travel: Approaching Light Speed


Interstellar Travel: Approaching Light Speed

Is interstellar travel doomed to remain in the realm of science fiction? Sticking to near future space propulsion only, how close can we get to the speed of light?

This video looks at the current spacecraft speed records with Apollo 10 holding the record for the fastest manned spacecraft, New Horizons probe for the fastest Earth escape velocity and the Helios probes for the fastest heliocentric velocity. But Solar Probe Plus will beat that when it launches in 2018. While Voyager 1 doesn't set any speed records, it was the first spacecraft to leave the solar system, so therefore the fastest solar system escape velocity by default.

For beating these speeds, this video explores what is possible in the near future only, so no antimatter, Alcubierre drives (warp), ramjets, etc... The EM drive is left out until it's proven with actual reproducible results in space.

Project Daedalus and the updated Project Icarus represent sound concepts for fusion spacecraft. IKAROS was the first successful demonstration of solar sail technology but hopefully the planetary society is not far behind with their LightSail cubsat (not covered in this video).

But what appears to have the most potential to reach the nearest star to our own, Proxima Centauri and it's newly discovered planet Proxima b is Breakthrough Starshot. Thousands of super lightweight laser sail nanocraft will be launched into space then the light beamer, a ground based laser array will propel these spacecraft to 20% light speed within minutes.

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Interstellar Travel - Documentary HD #Advexon

Interstellar Travel
Interstellar travel is the term used for hypothetical crewed or uncrewed travel between stars or planetary systems. Interstellar travel will be much more difficult than interplanetary spaceflight; the distances between the planets in the Solar System are less than 30 astronomical units (AU)—whereas the distances between stars are typically hundreds of thousands of AU, and usually expressed in light-years. Because of the vastness of those distances, interstellar travel would require a high percentage of the speed of light; huge travel time, lasting from decades to millennia or longer; or a combination of both.

The speeds required for interstellar travel in a human lifetime far exceed what current methods of spacecraft propulsion can provide. Even with a hypothetically perfectly efficient propulsion system, the kinetic energy corresponding to those speeds is enormous by today's standards of energy production. Moreover, collisions by the spacecraft with cosmic dust and gas can produce very dangerous effects both to passengers and the spacecraft itself.

A number of strategies have been proposed to deal with these problems, ranging from giant arks that would carry entire societies and ecosystems, to microscopic space probes. Many different spacecraft propulsion systems have been proposed to give spacecraft the required speeds, including nuclear propulsion, beam-powered propulsion, and methods based on speculative physics.

Is Interstellar Travel Possible? (Time Dilation & The Speed of Light)

Can we travel at light speed? We teamed up with Popular Science to find out!

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NASA's Engines and Possible Speed of Light Propulsion?

New propulsion technology is explained and the most advanced the ion engine, which in theory can propel a spacecraft nearing the speed of light.

NASA Engineer Designs a Near Light Speed Engine But Does It Work?

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Fastest way to reach Mars in 20 minutes at no cost - Connectome

Derek Muller (Veritasium) asks Michio Kaku (Nov 4, 2015) about whether it is possible to do interstellar space travel and Michio Kaku explains different ways that we are deploying right now like booster rockets, nuclear rockets, antimatter rockets but all of these are very expensive and takes lots of time. But there is another way that humanity isn't taking seriously and that is connectome aka sending human consciousness into space on a laser beam and it can help us reach alpha centauri in just four years.

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Journey Through The Universe At The Speed Of Light (4K UHD)

Light is incredibly fast, but frustratingly slow when it comes to travelling the universe. So how long does it take light to travel to Mars or Proxima Centauri? Find out here!

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Light Speed Travel

The speed of light is more of a hot topic than ever nowadays. It is the speed at which photons travel in a vacuum- and is the fastest speed achievable within the universe. As creatures of exploration and innovation, understanding light speed has naturally led us on a quest to try and determine a method with which we can reach it, and eventually one day exceed it. Si-Fi fantasy or not, a galaxy of the Milky Way’s vastness would require such speeds to make exploring it somewhat of a possibility for a race such as humanity’s. But there are some drawbacks. The difficulty of developing light speed travel, or propulsion systems that could travel at a high percentage of it, is enormous- and may be impossible altogether. Furthermore, our current understanding of physics suggests that were you to travel at this immense speed, you would be making more of a sacrifice than you first anticipate, as light and time go hand in hand at the limit of possibility. Nonetheless, we are investing, investigating and innovating, and examining the skies and the stars, as we search for a way to travel at the ultimate speed of light…


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5 REAL Possibilities for Interstellar Travel

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The prospect of interstellar travel is no longer sci-fi. It COULD be achievable within our lifetime! But, how would an interstellar rocket-ship work? On this week's episode of Space Time, Matt talks options for interstellar travel - from traditional rocket fuel to antimatter drives, could we travel to other star systems? Watch this episode of Space Time to find out!

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Can We Travel Faster Than Light? with Dr. Miguel Alcubierre

Can humanity build an Alcubierre warp drive?
Can we go faster than light?

Dr. Miguel Alcubierre was inspired by Star Trek the Next Generation's example of warp drive faster than light technology on the starship Enterprise. In 1994 he wrote a paper on how we could bend and warp space and time to travel faster than light within the rules of Einstein's general relativity. NASA has and is currently exploring if it is possible to bend the fabric of space and achieve hyper fast space travel with the Eagle Works lab. John Michael Godier spoke with Dr. Miguel Alcubierre on the feasibility of the Alcubierre warp drive and if there has been any developments within physics, including the use of dark matter or dark energy, and anti-gravity, to be able to make this possible.

The warp drive: hyper-fast travel within general relativity, Alcubierre, 1994.

Hyperfast Interstellar Travel in General Relativity,
Krasnikov, 1995.

Harold White, Warp Field Mechanics 101

Harold White, Warp Field Mechanics 102





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Interstellar Travel Challenges

This episode focuses on many of the problems with travel between stars at relativistic velocities, like collision avoidance, radiation, ship geometry, armor, and point-defense.

We will also look at some of the possible engine types and discuss realistic maximum speeds they offer.

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3 Things 'Faster Than Light'

These 3 things go faster than the speed of light. How's that even possible?
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Advanced scientific note about Doppler: If there is a light moving away from you at constant velocity in static flat (Minkowski) space-time, no matter how red it is, you will never conclude it is going faster than light. But, here I am discussing the conclusions one might come to if you mistakenly use Doppler in the context of the curved space-time of the universe (where there is expansion). Interpreting the huge redshift as a result of the doppler effect, could make one think that galaxies we see are moving away at speeds approaching light speed. And since what we are actually seeing is light from those galaxies from billions of years ago, and given that the universe is expanding, you might be tempted to say that they have since accelerated to faster than the speed of light. You might go further and say that there are more distant galaxies that we can't see which are moving away even faster. So you might conclude there are galaxies moving faster than light in the universe. But the redshift isn't from doppler and this acceleration of the expanding universe isn't actually causing a true increase in velocity.

Sometimes astronomers do say there is a faster than light recession speed by pretending the expansion of the universe is causing distant galaxies to move away from each other at a corresponding velocity, but that's misleading. In general relativity, you can actually have an increase in space between objects without causing a corresponding increase in the relatives velocities of those objects.


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The Secret To Interstellar Travel | Unveiled

Interstellar travel has been humanity's dream for decades! Our greatest scientists and engineers have been trying to work out exactly HOW we can branch out from Earth, to live in amongst the stars in the wider universe! The problem is that space is so inconceivably HUGE! In this video, Unveiled explores the science behind interstellar travel... to find out whether we'll EVER be able to jet off to distant planets and alien worlds!

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Will Wormholes Allow Fast Interstellar Travel?

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From Stargate to Interstellar, wormholes are our favorite method for traveling across fictional universes. But they are also a very serious field of study for some of our greatest minds over the last century. So what’s the holdup? When do we get to wormhole ourselves out of here?

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Written by Matt O'Dowd
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#space #astrophysics #interstellar

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How Close Are We To Star Trek's Warp Drive?

Can travelling at the speed of light become more than just fantasy?

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Space and Time Warps

In science fiction, space and time warps are a commonplace. They are used for rapid journeys around the galaxy, or for travel through time. But today's science fiction, is often tomorrow's science fact. So what are the chances for space and time warps.”

Warp Drives May Come With a Killer Downside

“Planning a little space travel to see some friends on Kepler 22b? Thinking of trying out your newly-installed FTL3000 Alcubierre Warp Drive to get you there in no time? Better not make it a surprise visit — your arrival may end up disintegrating anyone there when you show up.”

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The Big Problem With Interstellar Travel

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Elon Musk on How to Travel Faster than Light Speed “Space travels faster than the speed of light”

“There is conceivably a way to do warp drive.” Elon Musk discusses warping space within the known laws of physics, the expansion of the universe being faster than the speed of light (which allow us to see back in time when looking into space) and dark matter.

Stephen Hawking - Rocket to the Future

Stephen Hawking examines how we may some day, travel to the future.

Into The Universe With Stephen Hawking - Time Travel

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What happens as you approach the speed of light?

As you go faster, what happens to time and space? What would happen if you could manage to go the speed of light? Astrum Answers!
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A Slower Speed of Light

The sad story of travelling the speed of light

The speed of light and black holes. What happens when at the speed of light? What about a black hole? This video explains how time dilations works with very fast relativistic speeds. The equation and the intuition behind the logic.

We cover some of Albert Einstein relativistic physics theory.

0:00 - Introduction
0:16 - Why time is relative
1:09 - Time of different reference systems
2:27 A light speed journey

3:16 - Gravitational time dilation

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