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Stand by the launch: The world's 1st orbiting light sail
An elegant, 400-year-old means of navigating the stars takes flight.
- The Planetary Society is about to launch LightSail 2, a crowdfunded light sail craft.
- LightSail 2 uses photons from the sun as fuel.
- Space X's Falcom Heavy rocket will carry LightSail 2 aloft, 720 kilometers up.
In a 1608 letter to his friend Galileo Galilei, the German astronomer Johannes Kepler described his idea for space travel thusly:
"Provide ships or sails adapted to the heavenly breezes, and there will be some who will brave even that void."
Observing one of the 75-year transits of Earth by what would come to be known as Halley's Comet, he'd correctly intuited that the widening of that comet's tail, or coma, was produced by sunlight pushing material out and away from the main object.
Kepler seemed to immediately see the possibilities — i.e., a light sail.
Now — no later than June 24, 2019, as of this writing — the Planetary Society will be launching what they hope will be the first controlled light sail ever to enter and maintain Earth orbit. Their crowdfunded Lightsail 2 will ride aboard a Space X Falcon Heavy rocket departing from Launch Complex 39A at NASA's Kennedy Space Center in Florida for a year-long orbit.
"This is history in the making — LightSail 2 will fundamentally advance the technology of spaceflight," says Bill Nye, CEO of the Planetary Society.
The pieces of Kepler's dream have been falling into place bit by bit since that letter to Galileo. The discovery of photons in the late 1800s by James Clerk Maxwell revealed the energetic particles in light whose momentum could be transferred to other objects.
Friedrich Zander envisioned the "tremendous mirrors of very thin sheets" propelling craft through space, and then Carl Wiley foresaw a solar sail as a shiny, reflective, parachute-like material opening in the direction of sunlight.
By 1976, Carl Sagan went on TV to show off a demonstration model of a light sail craft, enthusing about the amazing technology and its potential.
Among Sagan's students some 40 years ago was Nye, a frequent Big Think contributor. The Society was founded by Sagan, Bruce Murray and Louis Friedman in 1980. In 2005, the Society launched the world's first light sail craft, the Cosmos 1, aboard a submarine-based ICBM. Unfortunately, it was lost when the ICBM failed before allowing Cosmos 1 a chance to fly on its own.
About the Planetary Society
The Planetary Society is the world's largest non-profit space organization, crowdfunded by over 50,000 members from over 100 countries, and supported by hundreds of volunteers. The Society was founded as outlet for the general public's interest in space, a level of interest not always reflected in governmental budgets. In addition to mounting projects such as the LightSail craft, the Society serves as an educational connection between the scientific community and the general public, advocates for robust governmental funding of space programs, and provides anyone an opportunity to get involved in some real space science.
The Society’s Lightsail craft
At the center of each frankly beautiful LightSail craft is a cubesat. While we tend to think of satellites as large, bus-sized objects, they can be much smaller for simpler missions. The cubesat for the upcoming LightSail 2, for example, is about the size of a loaf of bread.
At launch, the cubesat and sails are encased in four solar panels. Once in orbit, the panels swing up into operational position, exposing the cubesat and stored sails.
The sails themselves are four shiny Mylar sheets 4.5 microns thick — that's thinner than a human hair. They're next pulled outward by four cobalt-alloy booms that extend like tape measures. The process takes about three minutes. When deployed, the triangular sails together form a square that's just 32 square meters, about the size of a boxing ring.
The primary force to be overcome by LightSail craft is atmospheric drag, its collision with gas particles in the Earth's upper atmosphere. Think of it as friction that causes a satellite to slow and thus drop from orbit. In order for a craft to catch enough photon "propellant" — and to be high enough to get away from the upper atmosphere, its orbit needs to be above about 700 kilometers.
The Society has built two LightSail craft.
Image source: Planetary Society
Around 2014, NASA offered the Society a free ride aboard an Atlas V rocket as part of the agency's Educational Launch of Nanosatellites (ELaNa) program. Even though the Lightsail craft would be placed into orbit below the necessary 700-kilometer height, the Society decided to use one of their LightSails to test the mechanics of the sail deployment system.
Dubbed "LightSail 1," the sails successfully unfurled, as this selfie taken by LightSail 1 attests.
Image source: Planetary Society
And now LightSail 2
The second craft, now known and "LightSail 2," was slightly modified — particularly its software — according to insights gleaned during the first mission. It's scheduled as of this writing to go up from Kennedy Space Center in Florida later this month aboard a SpaceX Falcon Heavy as part of the U.S. Air Force's STP-2 mission from Kennedy Space Center in Florida.
This time, LightSail 2 will be carried within another, slightly larger satellite, Prox-1, developed by students at Georgia Tech. The Prox-1 will be placed into orbit around 720 meters up, and a week later will launch LightSail 2.
After a few days of diagnostics, LightSail 2 will open up its solar arrays, and then a day later, unfurl its sails. Over the next month, it will continually re-position its sails relative to the sun to raise its orbit — this is the main part of the mission, the actual solar sailing.
Mission complete, the craft will orbit for about a year before drag takes its toll, and LightSail 2 burns up plummeting down through the atmosphere. During this year, its position will be tracked via ground-based laser ranging, and it may be visible to the naked eye. The Society will offers an online dashboard that can tell you where and when to look up to se this most elegant spacecraft.
Inventions with revolutionary potential made by a mysterious aerospace engineer for the U.S. Navy come to light.
- U.S. Navy holds patents for enigmatic inventions by aerospace engineer Dr. Salvatore Pais.
- Pais came up with technology that can "engineer" reality, devising an ultrafast craft, a fusion reactor, and more.
- While mostly theoretical at this point, the inventions could transform energy, space, and military sectors.
The U.S. Navy controls patents for some futuristic and outlandish technologies, some of which, dubbed "the UFO patents," came to light recently. Of particular note are inventions by the somewhat mysterious Dr. Salvatore Cezar Pais, whose tech claims to be able to "engineer reality." His slate of highly-ambitious, borderline sci-fi designs meant for use by the U.S. government range from gravitational wave generators and compact fusion reactors to next-gen hybrid aerospace-underwater crafts with revolutionary propulsion systems, and beyond.
Of course, the existence of patents does not mean these technologies have actually been created, but there is evidence that some demonstrations of operability have been successfully carried out. As investigated and reported by The War Zone, a possible reason why some of the patents may have been taken on by the Navy is that the Chinese military may also be developing similar advanced gadgets.
Among Dr. Pais's patents are designs, approved in 2018, for an aerospace-underwater craft of incredible speed and maneuverability. This cone-shaped vehicle can potentially fly just as well anywhere it may be, whether air, water or space, without leaving any heat signatures. It can achieve this by creating a quantum vacuum around itself with a very dense polarized energy field. This vacuum would allow it to repel any molecule the craft comes in contact with, no matter the medium. Manipulating "quantum field fluctuations in the local vacuum energy state," would help reduce the craft's inertia. The polarized vacuum would dramatically decrease any elemental resistance and lead to "extreme speeds," claims the paper.
Not only that, if the vacuum-creating technology can be engineered, we'd also be able to "engineer the fabric of our reality at the most fundamental level," states the patent. This would lead to major advancements in aerospace propulsion and generating power. Not to mention other reality-changing outcomes that come to mind.
Among Pais's other patents are inventions that stem from similar thinking, outlining pieces of technology necessary to make his creations come to fruition. His paper presented in 2019, titled "Room Temperature Superconducting System for Use on a Hybrid Aerospace Undersea Craft," proposes a system that can achieve superconductivity at room temperatures. This would become "a highly disruptive technology, capable of a total paradigm change in Science and Technology," conveys Pais.
High frequency gravitational wave generator.
Credit: Dr. Salvatore Pais
Another invention devised by Pais is an electromagnetic field generator that could generate "an impenetrable defensive shield to sea and land as well as space-based military and civilian assets." This shield could protect from threats like anti-ship ballistic missiles, cruise missiles that evade radar, coronal mass ejections, military satellites, and even asteroids.
Dr. Pais's ideas center around the phenomenon he dubbed "The Pais Effect". He referred to it in his writings as the "controlled motion of electrically charged matter (from solid to plasma) via accelerated spin and/or accelerated vibration under rapid (yet smooth) acceleration-deceleration-acceleration transients." In less jargon-heavy terms, Pais claims to have figured out how to spin electromagnetic fields in order to contain a fusion reaction – an accomplishment that would lead to a tremendous change in power consumption and an abundance of energy.
According to his bio in a recently published paper on a new Plasma Compression Fusion Device, which could transform energy production, Dr. Pais is a mechanical and aerospace engineer working at the Naval Air Warfare Center Aircraft Division (NAWCAD), which is headquartered in Patuxent River, Maryland. Holding a Ph.D. from Case Western Reserve University in Cleveland, Ohio, Pais was a NASA Research Fellow and worked with Northrop Grumman Aerospace Systems. His current Department of Defense work involves his "advanced knowledge of theory, analysis, and modern experimental and computational methods in aerodynamics, along with an understanding of air-vehicle and missile design, especially in the domain of hypersonic power plant and vehicle design." He also has expert knowledge of electrooptics, emerging quantum technologies (laser power generation in particular), high-energy electromagnetic field generation, and the "breakthrough field of room temperature superconductivity, as related to advanced field propulsion."
Suffice it to say, with such a list of research credentials that would make Nikola Tesla proud, Dr. Pais seems well-positioned to carry out groundbreaking work.
A craft using an inertial mass reduction device.
Credit: Salvatore Pais
The patents won't necessarily lead to these technologies ever seeing the light of day. The research has its share of detractors and nonbelievers among other scientists, who think the amount of energy required for the fields described by Pais and his ideas on electromagnetic propulsions are well beyond the scope of current tech and are nearly impossible. Yet investigators at The War Zone found comments from Navy officials that indicate the inventions are being looked at seriously enough, and some tests are taking place.
If you'd like to read through Pais's patents yourself, check them out here.
Laser Augmented Turbojet Propulsion System
Credit: Dr. Salvatore Pais
Scientists do not know what is causing the overabundance of the gas.
- A new study looked to understand the source of methane on Saturn's moon Enceladus.
- The scientists used computer models with data from the Cassini spacecraft.
- The explanation could lie in alien organisms or non-biological processes.
Something is producing an overabundance of methane in the ocean hidden under the ice of Saturn's moon Enceladus. A new study analyzed if the source could be an alien life form or some other explanation.
The study, published in Nature Astronomy, was carried out by scientists at the University of Arizona and Paris Sciences & Lettres University, who looked at composition data from the water plumes erupting on Enceladus.
The particular chemistry, discovered by the Cassini spacecraft which flew through the plumes, suggested a high concentration of molecules that have been linked to hydrothermal vents on the bottom of Earth's oceans. Such vents are potential cradles of life on Earth, according to previous studies. The data from Cassini, which has been studying Saturn after entering its orbit in 2004, revealed the presence of molecular hydrogen (dihydrogen), methane, and carbon dioxide, with the amount of methane presenting a particular interest to the scientists."We wanted to know: Could Earthlike microbes that 'eat' the dihydrogen and produce methane explain the surprisingly large amount of methane detected by Cassini?" shared one of the study's lead authors Régis Ferrière, an associate professor in the department of Ecology and Evolutionary Biology at the University of Arizona.
Earth's hydrothermal vents feature microorganisms that use dihydrogen for energy, creating methane from carbon dioxide via the process of methanogenesis.
Searching for such microorganisms known as methanogens on the seafloor of Enceladus is not yet feasible. Likely, it would require very sophisticated deep diving operations that will be the objective of future missions.
So, Ferrière's team took a more available approach to pinpointing the origins of the methane, creating mathematical models that attempted to explain the Cassini data. They wanted to calculate the likelihood that particular processes were responsible for producing the amount of methane observed. For example, is the methane more likely the result of biological or non-biological processes?
They found that the data from Cassini was consistent with either microbial activity at hydrothermal vents or processes that have nothing to do with life but could be quite different from what happens on Earth. Intriguingly, models that didn't involve biological entities didn't seem to produce enough of the gas.
"Obviously, we are not concluding that life exists in Enceladus' ocean," Ferrière stated. "Rather, we wanted to understand how likely it would be that Enceladus' hydrothermal vents could be habitable to Earthlike microorganisms. Very likely, the Cassini data tell us, according to our models."
Still, the scientists think future missions are necessary to either prove or discard the "life hypothesis." One explanation for the methane that does not involve biological organisms is that the gas is the result of a chemical breakdown of primordial organic matter within Enceladus' core. This matter could have become a part of Saturn's moon from comets rich in organic materials.
It marks a breakthrough in using gene editing to treat diseases.
This article was originally published by our sister site, Freethink.
For the first time, researchers appear to have effectively treated a genetic disorder by directly injecting a CRISPR therapy into patients' bloodstreams — overcoming one of the biggest hurdles to curing diseases with the gene editing technology.
The therapy appears to be astonishingly effective, editing nearly every cell in the liver to stop a disease-causing mutation.
The challenge: CRISPR gives us the ability to correct genetic mutations, and given that such mutations are responsible for more than 6,000 human diseases, the tech has the potential to dramatically improve human health.
One way to use CRISPR to treat diseases is to remove affected cells from a patient, edit out the mutation in the lab, and place the cells back in the body to replicate — that's how one team functionally cured people with the blood disorder sickle cell anemia, editing and then infusing bone marrow cells.
Bone marrow is a special case, though, and many mutations cause disease in organs that are harder to fix.
Another option is to insert the CRISPR system itself into the body so that it can make edits directly in the affected organs (that's only been attempted once, in an ongoing study in which people had a CRISPR therapy injected into their eyes to treat a rare vision disorder).
Injecting a CRISPR therapy right into the bloodstream has been a problem, though, because the therapy has to find the right cells to edit. An inherited mutation will be in the DNA of every cell of your body, but if it only causes disease in the liver, you don't want your therapy being used up in the pancreas or kidneys.
A new CRISPR therapy: Now, researchers from Intellia Therapeutics and Regeneron Pharmaceuticals have demonstrated for the first time that a CRISPR therapy delivered into the bloodstream can travel to desired tissues to make edits.
We can overcome one of the biggest challenges with applying CRISPR clinically.
"While these are early data, they show us that we can overcome one of the biggest challenges with applying CRISPR clinically so far, which is being able to deliver it systemically and get it to the right place," she continued.
What they did: During a phase 1 clinical trial, Intellia researchers injected a CRISPR therapy dubbed NTLA-2001 into the bloodstreams of six people with a rare, potentially fatal genetic disorder called transthyretin amyloidosis.
The livers of people with transthyretin amyloidosis produce a destructive protein, and the CRISPR therapy was designed to target the gene that makes the protein and halt its production. After just one injection of NTLA-2001, the three patients given a higher dose saw their levels of the protein drop by 80% to 96%.
A better option: The CRISPR therapy produced only mild adverse effects and did lower the protein levels, but we don't know yet if the effect will be permanent. It'll also be a few months before we know if the therapy can alleviate the symptoms of transthyretin amyloidosis.
This is a wonderful day for the future of gene-editing as a medicine.
If everything goes as hoped, though, NTLA-2001 could one day offer a better treatment option for transthyretin amyloidosis than a currently approved medication, patisiran, which only reduces toxic protein levels by 81% and must be injected regularly.
Looking ahead: Even more exciting than NTLA-2001's potential impact on transthyretin amyloidosis, though, is the knowledge that we may be able to use CRISPR injections to treat other genetic disorders that are difficult to target directly, such as heart or brain diseases.
"This is a wonderful day for the future of gene-editing as a medicine," Fyodor Urnov, a UC Berkeley professor of genetics, who wasn't involved in the trial, told NPR. "We as a species are watching this remarkable new show called: our gene-edited future."