Let's see, we're still using mostly chemical propellants which also have this problem:
Originally posted by Astyanax
My research supports the contention that at speeds very close to the speed of light, the temperature of this heat bath is high enough to melt all known materials.
Depressing if true. Anyone care to discuss this? And let's try not to derail the thread into discussions about faster-than-light travel, please...
So, in addition to not having enough mass in the universe for chemical propulsion to travel to just the nearest star, according to NASA, oh by the way it would also get hot?
Here are four examples [large graphic] of what it would take to send a canister about the size of a Shuttle payload (or a school bus) past our nearest neighboring star...and allowing 900 years for it to make this journey.
Well....If you use chemical engines like those that are on the Shuttle, well..., sorry, there isn’t enough mass in the universe to supply the rocket propellant you’d need.
Originally posted by syrinx high priest
how does anything larger than a photon travel the speed of light ?
you need a shrink ray first
I was going to suggest: some sort of "cocoon" (magnetic bubble or whatever) surrounding the ship -- or at least at the bow -- protecting it from the friction.
Namely, a warp drive mechanism which doesn't thrust the ship through space, but thrusts space around the ship.
Ahh, i see you have
managed to rule out
MASS from the eq.
The faster an object move the more mass it gains.
I thought that was impossible, but then again so is free energy right
The Bussard ramjet is a theoretical method of spacecraft propulsion proposed in 1960 by the physicist Robert W. Bussard, popularized by Poul Anderson's novel Tau Zero, Larry Niven in his Known Space series of books, Vernor Vinge in his Zones of Thought series, and referred to by Carl Sagan in the television series and book Cosmos. Bussard proposed a ramjet variant of a fusion rocket capable of reasonable interstellar spaceflight, using enormous electromagnetic fields (ranging from kilometers to many thousands of kilometers in diameter) as a ram scoop to collect and compress hydrogen from the interstellar medium. High speeds force the reactive mass into a progressively constricted magnetic field, compressing it until thermonuclear fusion occurs. The magnetic field then directs the energy as rocket exhaust opposite to the intended direction of travel, thereby accelerating the vessel.
Originally posted by Diablos
The problem of whether temperature is observer-dependent or invariant has been controversial even since the days of Einstein. Giants like Einstein and Pauli held that temperature is observer dependent, while other giants such as Planck held that temperature is Lorentz Invariant by showing entropy is a Lorentz Invariant. There is still no strong consensus among experts, although there is the first rigorous treatment of relativistic thermodynamics by Stewart-Israel which suggested a temperature transformation doesn't exist by showing temperature to be a 4-vector. A quantum field theory analysis agrees with this result and leans more towards temperature being invariant. The fact that the researcher doesn't highlight which model he is using to base his results on is troubling at best.
While I think there are many serious problems to overcome if rapid interstellar travel is to ever become a reality, it is highly unlikely based on current models that relativistic thermodynamics is one of them.