Discussion Forums > Technology
South Korea succeeds in launching its first domestic space vehicle but fails-
darkjedi:
--- Quote from: Tatsujin on August 25, 2009, 09:53:47 AM ---I'll live in space only when the technology has reached Macross Frontier's level.
--- End quote ---
You'll likely never live in space then I'm afraid.
The world of Macross series is as advanced as it is because the humanity of that time discovered an alien artifact (a ship?) from which they reverse-engineered the alien's advanced technology.
I doubt we'll be scooping up such goodies in the foreseeable future. First thing, aliens need to exist nearby... an occurrence the chance of which is nil.
If they are already traveling towards us at interstellar speed right now but hasn't reached us yet, then we'll have detected their spectral signature already. Since we did not detect yet a signature of an object whose spectral readings (obtained through the analysis of their 'radiation's frequency; eg. gamma-ray at what amplitude, etc. then derive using doppler effect and maxwell's equation to get their probable mass and probable speed) coincides with the expected spectral readings of a spaceship which is traveling at a convenient speed for interstellar travel, we can rule out the existence of alien species in our immediate vicinity. (actually we just call it 'use the blue-shift')
So we won't meet aliens any time soon, and you wouldn't be going to space either. :'(
darkjedi:
(click to show/hide)South Korea launched a two-stage Naro rocket from its space centre on Oenaro Island, around 290 miles south of Seoul.
The launch, which was initially delayed from late July, is likely to rile North Korea, which was sanctioned by the United Nations for its own attempt to launch a rocket earlier this year. North Korean state media said Pyongyang would "closely watch" the reaction of the international community to the launch.
The Naro rocket was carrying a domestic satellite that was supposed to monitor the atmosphere.
But the satellite failed to detach from the rocket and enter an orbit.
"All aspects of the launch were normal, but the satellite exceeded its planned orbit and reached an altitude of 223 miles," said Ahn Byong-man, the Science minister. The satellite should have separated at around 187 miles.
It was the first rocket that South Korea has launched from its own territory. The rocket was built with help from Russia for £244 million. Seoul has relied on foreign countries to assist with launching satellites since 1992.
Engineers said they were trying to track the satellite.
Relations between North and South Korea have improved in the wake of former president Bill Clinton's trip to Pyongyang. The North sent a high-level cadre to attend the funeral of Kim Dae-Jung, the former South Korean president who pioneered the "sunshine policy" between Seoul and Pyongyang.
.......... ._.
That report was from U.K., this is from South Korea:
(click to show/hide)Korea launched its first space launch vehicle (KSLV- I), or Naro, from the Naro Space Center in Goheung, South Jeolla Province at 5 pm on Aug. 25 after seven delays. But it failed to put the Science and Technology Satellite-2 into the targeted orbit.
Naro blasted off 15 minutes after the automatic countdown began. Fifty-four seconds after the takeoff, Naro exceeded the sound barrier. Three minutes and 35 seconds later, its upper section separated. Three minutes and 49 seconds after the takeoff, its first-stage engine was ordered to stop and three minutes and 52 seconds later, its first-stage rocket separated.
Six minutes and 35 seconds after the takeoff, the second-stage rocket was ignited. And seven minutes and 33 seconds later and the first-stage combustion ended. But the launch failed to put the satellite into the orbit.
The Ministry of Education, Science and Technology said it will make an announcement as soon as an investigation is finished.
relic2279:
If there are aliens traveling in interstellar space, I don't think they'd be using conventional means, otherwise it would take them tens of thousands to hundreds of thousands of years to reach us from our closest neighboring stars.
Our only hope is they discovered an energy source capable of warping space/time (warp drive) or harnessed theoretical exotic matter capable of holding open and expanding microscopic worm holes that may or may not exist. Neither of those would give off any detectable or measurable tell tail signs that I am aware of. At least with our current technology.
darkjedi:
--- Quote from: relic2279 on August 25, 2009, 10:34:10 AM ---If there are aliens traveling in interstellar space, I don't think they'd be using conventional means, otherwise it would take them tens of thousands to hundreds of thousands of years to reach us from our closest neighboring stars.
--- End quote ---
By conventional means, do you mean traveling using 'propulsion'? e.g. ion engine or solar sails or nuclear pulse engines or a myriad of other types of possible engines?
Interstellar travel through conventional means is possible. Theoretically humanity can already propel its spaceships to nearly 60% the speed of light using the current technology; the underlying problem would be the 'cost', and how to protect the equipments and 'possible' human crew from aging process and doppler effect. (gamma rays will fry electronics and human flesh) General relativity will not cause problems to propulsion until we reach a very very high speed, like 80~99% the speed of light. 60% is very possible, and with 60% the speed of light we can reach the nearest star system in only 7 years.
--- Quote from: relic2279 on August 25, 2009, 10:34:10 AM ---Our only hope is they discovered an energy source capable of warping space/time (warp drive) or harnessed theoretical exotic matter capable of holding open and expanding microscopic worm holes that may or may not exist. Neither of those would give off any detectable or measurable tell tail signs that I am aware of. At least with our current technology.
--- End quote ---
Definitely possible, although I don't know how useful these technology will be to us; as in, the us, those who'd use it for things like 'living' or 'traveling'. inherently our own 'body' is limited. We'll not be able to send our bodies through wormholes without being pasted into spaghetti. But that doesn't rule out nanoscopic robotic interstellar probes for research/exploration/discovery/surveillance purposes. But I think they are gonna be rather useless; we already have enough resources in our own solar system that can last us until the end of the world. We ourselves don't need to colonize other space or even explore them any further beyond our solar system. But the same might not hold true for alien species.
Btw, warping space and time definitely causes detectable tell-tail signs; 'gravitational wave' is one. The kind of explosion that we'll be required to produce in outer space to bend space into singularity will also give off radiation that can be detected even through our own means. An alien species who are as advanced as we are will be able to detect our attempt at producing singularity. There are might be other ways that I do not know of yet.
But of course if they warp space into our vicinity then they'll be here instantly so our ability to detect their 'teleport' will be irrelevant. :)
relic2279:
--- Quote from: darkjedi on August 25, 2009, 11:00:58 AM ---By conventional means, do you mean traveling using 'propulsion'? e.g. ion engine or solar sails or nuclear pulse engines or a myriad of other types of possible engines?
--- End quote ---
By conventional I meant anything sub light speed.
--- Quote ---General relativity will not cause problems to propulsion until we reach a very very high speed, like 80~99% the speed of light. 60% is very possible, and with 60% the speed of light we can reach the nearest star system in only 7 years.
--- End quote ---
I'm pretty sure all we can achieve right now is 10% speed of light with a fusion based Orion drive (which we still would need to perfect fusion before we could do it. By the way, the Orion drive is wicked cool. You drop nukes behind you and set them off. Viola! Instant propulsion)
I haven't really seen any references of Ion thrusters even coming close to that yet.
http://www.reddit.com/r/science/comments/87hhn/the_cancelled_project_orion_a_spaceship_that/
--- Quote ---Definitely possible, although I don't know how useful these technology will be to us; as in, the us, those who'd use it for things like 'living' or 'traveling'. inherently our own 'body' is limited. We'll not be able to send our bodies through wormholes without being pasted into spaghetti.
--- End quote ---
Worm holes don't have any gravity or tidal forces like black holes do. The only problem is they're so unstable, that a single proton going through would snap one shut. That is unless you have exotic matter which produces negative energy capable of holding it hoping. Which is theoretical and may not actually exist.
--- Quote ---Btw, warping space and time definitely causes detectable tell-tail signs; 'gravitational wave' is one. The kind of explosion that we'll be required to produce in outer space to bend space into singularity will also give off radiation that can be detected even through our own means. An alien species who are as advanced as we are will be able to detect our attempt at producing singularity. There are might be other ways that I do not know of yet.
--- End quote ---
A warp drive just creates a warp bubble around your ship. You don't need a singularity to create one. A warp drive works by compressing space time in front of you, and expanding it behind you. Almost like a jet engine, except for space/time instead of air.
(click to show/hide)
But regardless, we don't have anything up in the sky or on earth capable or rather, sensitive enough yet to detect gravitational waves (usually given off by 2 black holes or neutron stars colliding). Though, they're getting ready to put one up in space. LISA as it's called, will be launched in 2011. Still, I highly doubt it will be strong enough to detect the warping of space by a warp drive.
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