UFO'S of UAP'S, ASTRONOMIE, RUIMTEVAART, ARCHEOLOGIE, OUDHEIDKUNDE, SF-SNUFJES EN ANDERE ESOTERISCHE WETENSCHAPPEN

A swarm of laser-sail spacecraft leaving the Solar System.

Credit: Adrian Mann

NASA and China plan to mount crewed missions to Mars in the next decade. While this represents a tremendous leap in terms of space exploration, it also presents significant logistical and technological challenges. For starters, missions can only launch for Mars every 26 months when our two planets are at the closest points in their orbit to each other (during an “Opposition“). Using current technology, it would take six to nine months to transit from Earth to Mars.

Even with nuclear-thermal or nuclear-electric propulsion (NTP/NEP), a one-way transit could take 100 days to reach Mars. However, a team of researchers from Montreal’s McGill University assessed the potential of a laser-thermal propulsion system. According to their study, a spacecraft that relies on a novel propulsion system – where lasers are used to heat hydrogen fuel – could reduce transit times to Mars to just 45 days!

The research was led by Emmanuel Duplay, a McGill graduate and current MSc Aerospace Engineering student at TU Delft. He was joined by Associate Professor Andrew Higgins and multiple researchers with the Department of Mechanical Engineering at McGill University. Their study, titled “Design of a rapid transit to Mars mission using laser-thermal propulsion,” was recently submitted to the journal Astronomy & Astronomy.

Artist’s impression of a directed-energy propulsion laser sail in action.

Credit: Q. Zhang/deepspace.ucsb.edu

In recent years, directed-energy (DE) propulsion has been the subject of considerable research and interest. Examples include the Starlight program – also known as the Directed Energy Propulsion for Interstellar Exploration (DEEP-IN) and Directed Energy Interstellar Studies (DEIS) programs – developed by Prof. Phillip Lubin and the UCSB Experimental Cosmology Group (ECG). As part of NASA-funded research that began in 2009, these programs aim to adapt large-scale DE applications for interstellar missions.

There’s also Breakthrough Starshot and Project Dragonfly, both of which emerged from a design study hosted by the Initiative for Interstellar Studies (i4iS) in 2013. These concepts call for a gigawatt-power laser array to accelerate a lightsail and a small spacecraft to a fraction of the speed of light (aka. relativistic speeds) to reach nearby star systems in decades, rather than centuries or millennia.

But whereas these concepts are interstellar in focus, Duplay and his colleagues explored the possibility of an interplanetary concept. As Duplay explained to Universe Today via email:

“The ultimate application of directed-energy propulsion would be to propel a lightsail to the stars for true interstellar travel, a possibility that motivated our team that did this study. We were interested in how the same laser technology could be used for rapid transit in the solar system, which will hopefully be a nearer-term steppingstone that can demonstrate the technology.”

Project Starshot, an initiative sponsored by the Breakthrough Foundation, is intended to be humanity’s first interstellar voyage.

Credit: breakthroughinitiatives.org

Aside from laser sail propulsion, DE is being explored for several other space exploration applications. This includes power beaming to and from spacecraft and permanently-shadowed habitats (e.g., the Artemis Program), communications, asteroid defense, and the search for possible technosignatures. There’s also a concept for a laser-electric spacecraft being investigated by NASA and as part of a collaborative study between the UCSB ECG and MIT.

For this application, lasers are used to deliver power to photovoltaic arrays on a spacecraft, which is converted to electricity to power a Hall-Effect Thruster (ion engine). This idea is similar to a nuclear-electric propulsion (NEP) system, where a laser array takes the place of a nuclear reactor. As Duplay explained, their concept is related but different:

“Our approach is complimentary to these concepts, in that it uses the same phased-array laser concept, but would use a much more intense laser flux on the spacecraft to directly heat propellant, similar to a giant steam kettle. This permits the spacecraft to accelerate rapidly while it is still near earth, so the laser does not need to focus as far into space.

“Our spacecraft is like a dragster that accelerates very quickly while still near earth. We believe we can even use the same laser-powered rocket engine to bring the booster back into earth orbit, after it has thrown the main vehicle to Mars, enabling it to be quickly recycled for the next launch.”

An artist’s concept for a nuclear rocket that would facilitate missions to Mars.

Credit: Rolls-Royce

In this respect, the concept proposed by Duplay and his colleagues is akin to a nuclear-thermal propulsion (NTP) system, where the laser has taken the place of a nuclear reactor. In addition to DE and hydrogen propellant, the mission architecture for a laser-thermal spacecraft includes several technologies from other architectures. As Duplay indicated, they include:

“[A]rrays of fiber-optic lasers that act as a single optical element, inflatable space structures that can be used to focus the laser beam when it arrives at the spacecraft into the heating chamber, and the development of high-temperature materials that allow the spacecraft to break against the Martian atmosphere upon arrival.”

This last element is essential given that there’s no laser array at Mars to decelerate the spacecraft once it reaches Mars. “The inflatable reflector is a key from other directed-energy architectures: designed to be highly reflective, it can sustain a greater laser power per unit area than a photovoltaic panel, making this mission feasible with a modest laser array size compared to laser-electric propulsion,” added Duplay.

By combining these elements, a laser-thermal rocket could enable very fast transits to Mars that would be as short as six weeks – something that was considered possible only with nuclear-powered rocket engines before. The most immediate benefit is that it presents a solution to the hazards of deep-space transits, like prolonged exposure to radiation and microgravity.

Artist’s impression of the Mars Base Camp in orbit around Mars. When missions to Mars begin, one of the greatest risks will be that posed by space radiation.

Credit: Lockheed Martin

At the same time, says Duplay, the mission presents some hurdles since many of the technologies involved are bleeding-edge and have not been tested just yet:

“The laser heating chamber is likely the most significant challenge: Can we contain hydrogen gas, our propellant, as it is being heated by the laser beam to temperatures greater than 10,000 K while at the same time keeping walls of the chamber cool? Our models say this is feasible, but experimental testing at full scale is not possible at present because we have not yet built the 100 MW lasers needed.”

While much of the technology in this proposed mission architecture – and other similar proposals – is still in the theory and development phase, there is no doubt about their potential. Reducing the time it takes to get to Mars to a matter of weeks instead of months will address two of the biggest challenges for Mars missions – logistical and health considerations.

Furthermore, establishing a rapid-transit system between Earth and Mars will speed the creation of infrastructure between Earth and Mars. This could include a Gateway-like space station in orbit of Mars, like the Mars Base Camp proposed by Lockheed Martin, as well as a laser array to decelerate incoming spacecraft. The presence of these facilities would also accelerate plans to create a permanent human presence on the surface. As Professor Higgins concluded:

“The Mars-in-45-days design study that Emmanuel led was motivated by exploring other, near-term applications of the phased array laser technology that Philip Lubin’s group is developing. The ability to deliver energy deep into space via laser would be a disruptive technology for propulsion and power. Our study examined the laser thermal approach, which looks encouraging, but the laser technology itself is the real game changer.”

Originally published on Universe Today.

A few days ago I got into a debate about the theories of the late Mac Tonnies, well known for his books, After the Martian Apocalypse and The Cryptoterrestrials. It’s the latter book (and the relevant data and theories) that I’m focusing on today. I have to say that Tonnies’ The Cryptoterrestrials makes a very good, solid case with regard to his ideas and concepts. If you don’t know them, it basically like this: that the UFO phenomenon has nothing to do with extraterrestrials, but everything to do with an ancient, advanced, human society that has lived here in stealth for possibly tens of thousands of years. Maybe, even longer. And, as Mac saw it, the Cryptoterrestrials present themselves as aliens from other worlds (or even from other solar-systems) so we don’t discover their true origins. Mac was a great writer and he presented his overall story in a fashion that definitely makes food for thought. And, as I see it, many of his theories stand up. For example, he suggested the reason why the 1950s-era “Space Brothers” were so concerned about our nuclear weapons was because they were really from Earth, and not from another world, at all. In other words, if we destroyed ourselves, then the Space Brothers – really home-grown, ancient humanoids and not ETs – would be destroyed in the radioactive inferno, too.

(Nick Redfern)

“Giant Rock,” California and Mac Tonnies “Space Brothers”

Tonnies also focused on the matter of the black-eyed Greys of today and how the Cryptoterrestrials might be using our DNA, cells, eggs, sperm, and so on, to try and save their waning civilization – a civilization that really has its origins on Earth. In addition, he looked at the matter of the Cryptoterrestrials – carefully, stealthily and even in a creepy and sinister fashion – infiltrating our society and our cities. Let’s see a few of Mac’s own words that he made to me before his death. In terms of his theorizing, Tonnies said: “After devouring countless books on the UFO controversy and the paranormal, I began to acknowledge that the extraterrestrial hypothesis suffered some tantalizing flaws. In short, the ‘aliens’ seemed more like surreal caricatures of ourselves than beings possessing the god-like technology one might plausibly expect from interstellar visitors. Like [UFO researcher] Jacques Vallee, I came to the realization that the extraterrestrial hypothesis isn’t strange enough to encompass the entirety of occupant cases. But if we’re dealing with humanoid beings that evolved here on earth, some of the problems vanish.”

Mac had more to think on: “I envision the Cryptoterrestrials engaged in a process of subterfuge, bending our belief systems to their own ends. And I suggest that this has been occurring, in form or another, for an extraordinarily long time. I think there’s a good deal of folkloric and mythological evidence pointing in this direction, and I find it most interesting that so many descriptions of ostensible ‘aliens’ seem to reflect staged events designed to misdirect witnesses and muddle their perceptions. I regard the alleged ‘hybridization program’ with skepticism. How sure are we that these interlopers are extraterrestrial? It seems more sensible to assume that the so-called aliens are human, at least in some respects. Indeed, descriptions of intercourse with aliens fly in the face of exobiological thought. If the cryptoterrestrial population is genetically impoverished, as I assume it is, then it might rely on a harvest of human genes to augment its dwindling gene-pool. It would be more advantageous to have us believe we’re dealing with omnipotent extraterrestrials, rather than a fallible sister species. The ET-UFO mythos may be due, in part, to a long-running and most successful disinformation campaign.”

(Nick Redfern)

Only a model, but it captures the atmosphere!

As I see it, Mac worked out his theory pretty good (and granted, yes, it was just a theory). There is one part of the story, however, that I can’t buy into – or, at least, not to a 100 percent degree. Here’s why: one of the things Mac suggested was that the Cryptotererstrials were only seen now and then (and that went for their craft, too) because for most of the time they lived underground. This is where my doubts come in. Of course, for centuries tales of strange entities among us can be placed in that category – and living below the surface of our world – abound. Fairies, “the little people,” Richard Shaver, the “Dulce Base” controversy, and more. Is it feasible that an entire ancient civilization would be able to hide underground? And, even more importantly, what about not being seen coming in and out of huge entry and exit places – and maybe on every continent? That’s where I feel Mac stretched things to a degree – maybe a significant degree. I can see aliens stealthily entering our solar-system – and our atmosphere, too – and not being seen. But, ship after ship soaring out of large tunnels that clearly no-one has ever found? If someone showed me some kind of proof of massive, high-tech, underground worldwide caverns, caves and underground bases I wouldn’t just be impressed. I would be beyond impressed.

In short: if the Cryptoterrestrials (and their craft) are from the Earth’s underground, then they surely would be seen like a missile exiting a military missile silo – here, there and everywhere and 24/7, too. But, that’s not what we’re seeing. Yes, we see UFOs all the time. Do we see them coming out of the ground over and over again? Nope. And that’s a key issue. I like Mac’s theory of an ancient humanoid race – one that looks somewhat like us and that is infiltrating us. But, the underground aspect? No.

RELATED VIDEOS, selected and posted by peter2011