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Salinity Gradient Energy
By Sustainability Directory5 April 2025

About 3.5%
About 3.5% of ocean water is salt, which means there are approximately 35 grams of salt for every liter of seawater. This salinity level is consistent across most of the world's oceans, with variations typically ranging between 34 and 36 parts per thousand (ppt).

60 parts per thousand
The Salton Sea is approximately 60 parts per thousand (PPT) saltier than the Pacific Ocean, which is about 35 PPT. This means that the Salton Sea has a salinity level of around 44,000 mg/L. The salinity of the Salton Sea increases annually due to evaporation and the influx of agricultural drainage water.

Floating solar panels that track the sun
October 7, 2023

Benefits and implications
Antonio Duarte, SolarisFloat’s lead technical engineer, rightly observes that renewable energy production, especially solar, will find more adoption on water than on land, primarily because land is a dwindling asset. Floating solar offers an innovative solution without compromising precious land resources.

Additionally, Alona Armstrong, an expert from Lancaster University, points out that if executed correctly, floating solar systems can offer not only low-carbon energy but also improve water body conditions by cooling the water and reducing phytoplankton biomass. This multi-pronged advantage is indeed a boon for the environment and energy sectors alike.

According to data reported by the BBC, solar PV capacity has skyrocketed from 72GW in 2011 to 843GW in 2021, now accounting for 3.6% of global electricity generation. With floating solar’s advent, this trajectory is only expected to rise steeply.

Cooling paint drops the temperature of any surface
Material that reflects light and sheds heat could put a large dent in AC costs
27 Sep 2018ByRobert F. Service

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Pond Informer
https://pondinformer.com › salton-sea-fish-species
List of Fish Species in the Salton Sea (Updated) - Pond Informer
In addition, the Salton Sea has a salinity of around 60 parts per thousand, close to double the average salinity of the ocean. As a result, few species of fish can survive in the lake, and most of the aquatic biodiv… See more

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TerraCycle
Recycled plastic can be transformed into a wide variety of products, including household items, construction materials, clothing, and packaging, contributing to sustainability and reducing waste.
Common Products Made from Recycled Plastic
Household Items: Many everyday products such as storage bins, kitchen utensils, and tableware are made from recycled plastics. For example, plates, cups, and cutting boards are often produced using recycled polypropylene and PET, which are durable and food-safe.
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Textiles and Fashion: The fashion industry has embraced recycled plastics, particularly in the form of recycled polyester (rPET). This material is used to create clothing, activewear, and accessories, effectively turning plastic bottles into stylish garments.
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Construction Materials: Recycled plastics are increasingly used in the construction industry. Products like composite lumber, insulation, and roofing tiles are made from recycled plastic, offering durability and weather resistance while reducing the need for virgin materials.
2
Rugs and Carpets: Area rugs made from recycled plastic can contain hundreds of recycled bottles, providing a soft and stain-resistant option for home decor.
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Packaging: Many companies are now using recycled plastics for packaging, including food containers and wrappers. This shift helps reduce the production of new plastic and encourages sustainable consumer choices.
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Furniture: Modern furniture, including kitchen cabinets and outdoor furniture, is often made from recycled plastics combined with other materials, providing a sustainable alternative to traditional wood products.
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4 Sources
Benefits of Using Recycled Plastic
Environmental Impact: Using recycled plastic helps divert waste from landfills and oceans, reducing pollution and conserving natural resources.
Energy Conservation: The production of items from recycled plastics typically requires less energy compared to manufacturing with virgin materials, making it a more sustainable choice.
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By choosing products made from recycled plastic, consumers can contribute to a more sustainable future and help combat plastic pollution.

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Sources of microplastics
The existence of microplastics in the environment is often established through aquatic studies. These include taking plankton samples, analyzing sandy and muddy sediments, observing vertebrate and invertebrate consumption, and evaluating chemical pollutant interactions.[54] Through such methods, it has been shown that there are microplastics from multiple sources in the environment.[citation needed]

Textiles, tires, and urban dust[55] account for over 80% of all microplastics in the seas and the environment.[9] Microplastic is also a type of airborne particulates and is found to prevail in air.[56][57][58] Paint appears as the largest source of microplastic leakage into the ocean and waterways (1.9 Mt/year), outweighing all other sources of microplastic leakage.[59] Microplastics could contribute up to 30% of the Great Pacific Garbage Patch polluting the world's oceans and, in many developed countries, are a bigger source of marine plastic pollution than the visible larger pieces of marine litter, according to a 2017 IUCN report.[5] Oceanic microplastics are a common source of heavy metals[60] due to the inclusion of coloring compounds containing chromium, manganese, cobalt, copper, zinc, zirconium, molybdenum, silver, tin, praseodymium, neodymium, erbium, tungsten, iridium, gold, lead, or uranium.[61]

Oral intake
Oral intake is the main pathway of human exposure to microplastics.[62] Microplastics exist in daily necessities like drinking water, bottled water, seafood, salt, sugar, tea bags, milk, and so on.[63]

65 million microplastics are released into water sources every day.[64] In 2017, more than eight million tons of plastics entered the oceans, greater than 33 times as much as that of the total plastics accumulated in the oceans by 2015.[65] One consequence of this is marine life consumption of microplastics. It is estimated that Europeans are exposed to about 11,000 particles/person/year of microplastics due to shellfish consumption.[66]

Microplastics may enter drinking water sources in a number of ways: from surface runoff (e.g. after a rain event), to wastewater effluent (both treated and untreated), combined sewer overflows, industrial effluent, degraded plastic waste, and atmospheric deposition.[67] Surface run-off and wastewater effluent are recognized as the two main sources, but better data are required to quantify the sources and associate them with more specific plastic waste streams. Plastic bottles and caps that are used in bottled water have been confirmed as sources of microplastics in drinking-water.[67][68]

Microplastics may also have been widely distributed in soil, especially in agricultural systems.[69] They (especially with negative charge) can get into the water transport system of plants, and then move to the roots, stems, leaves, and fruits.[70] Once microplastics enter agricultural systems through sewage sludge, compost, and plastic mulching, they will cause food pollution, which may increase the risk of human exposure.[71] A 2023 study found that microplastics can reduce soil fertility and crop yields by disrupting soil microbial communities and water retention capacity.[72]

Clothing

Stoke Space Second Stage: High Performance and Reusable within 24 Hours of Landing
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Space Startup News
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月の土壌から驚異の物質「グラフェン」が発見される - デイリーニュースオンライン
Recent discoveries have confirmed the presence of carbon on the Moon, reshaping our understanding of its geology and formation.
Key Discoveries
Graphene in Lunar Samples: The Chang’e-5 mission brought back lunar dust that revealed thin layers of carbon known as graphene. This finding marks the first confirmation of natural few-layer graphene in lunar material, suggesting that carbon may play a significant role in lunar geology and resource planning for future missions.
1
Carbon Emissions: Research using data from Japan's Kaguya lunar orbiter has shown that the Moon emits carbon ions across almost its entire surface. This challenges the long-held belief that the Moon is depleted of carbon and suggests that carbon has been present since the Moon's formation or acquired billions of years ago. The emissions vary by region, with younger volcanic plains emitting more carbon ions than older highlands, indicating that carbon is embedded within the Moon's surface.
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Potential Resources: The presence of carbon raises questions about its viability as a resource for future lunar exploration. Some studies suggest that while the Moon is generally poor in carbon sources compared to Mars, certain polar regions may contain subsurface carbon-bearing ices that could be utilized for propellant and other applications.
1
Implications for Lunar Formation Theories: The discovery of carbon and its emissions suggests that the Moon's formation model may need to be revised. Previously, it was thought that the intense heat from the impact that formed the Moon would have boiled away volatile elements like carbon. However, the presence of carbon indicates that milder temperatures may have been involved in its formation.
2

4 Sources
Conclusion
The findings regarding carbon on the Moon not only enhance our understanding of its geological history but also open up new possibilities for resource utilization in future lunar missions. As research continues, the implications of these discoveries could significantly influence lunar exploration strategies and our understanding of planetary formation processes.

SpaceX's Genius Solution on Dragon to the Moon with Starship Revealed!

GREAT SPACEX

Void
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Registered: 2011-12-29
Posts: 9,015
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Well, this is huge!

https://www.msn.com/en-us/news/technolo … r-AA1QFaJ9  Quote:

NASA Study Finds Water On Moon—Billions Of Tons Signal ‘Game-Changer For Colonization’
Story by Ally Webb • 4d •
4 min read

If there is water ice in such quantities, then I am hopeful for CO2 deposits as well.

I am afraid that this tilts primary purpose to the Moon for a while.

Sorry?  Not at all.  It is seeming to be a wonderful gift.

It seems that the North pole has twice as much water ice as the south pole does, which contradicts prior thinking.

Farms on the Moon!  Resources for missions to Mars!

Ending Pending smile

Last edited by Void (Today 10:57:35)

Scientists traced the origins of this water to ancient volcanic activity, which released water vapor billions of years ago. This vapor settled in the Moon’s permanently shadowed polar craters, where it froze and remained undisturbed for eons. The accumulation of high-resolution data transformed theoretical models into concrete evidence, confirming that significant water resources are locked just beneath the lunar surface.

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Time Sequence Figure of Lunar Lava Plain Formation
Billions of years ago, the Moon had an atmosphere. Intense volcanic eruptions spewed gases above the surface faster than they could escape to space, creating an atmosphere. Currently, the Moon has a thin exosphere, originating from powdery regolith kicked up by impacts and the solar wind.
NASA
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One of the most striking findings is the asymmetry between the Moon’s poles. Contrary to longstanding assumptions of symmetry, the northern polar region contains twice as much water ice as the south. Researchers attribute this to differences in volcanic history and crater geometry, which favored ice preservation in the north.

The lab under Greenland's ice sheet

Scientific American
441K subscribers

The crater floor lies about 2 kilometres (1.2 mi) below the rim, and is covered by a 1.8 kilometres (1.1 mi) deep central mound of permanent water ice, up to 60 kilometres (37 mi) in diameter.[2]

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Where is Svalbard? Exploring the Archipelago's Unique Location
74° to 81° North
The latitude of Svalbard ranges from 74° to 81° North. More specifically, one source lists it as 79.004959° N, while another provides a general latitude of 78.0000° N. This archipelago is located in the Arctic Ocean, north of mainland Europe.
secretatlas.com
+3

Starship>200 Tons Payload in reusable mode.

The blurb about Starboat is especially interesting to me.  More or less an optional 3rd stage for the Starship system.

-Could be lifted to LEO fully filled with propellants by one Starship.

-Payload to Mars 5-25 Tons?

-2200 km point to point on Mars. (Using 100 tons of propellants)

-50-120 tons of propellants to get back to Earth.

-1/5th as heavy as a Starship.

Free-return trajectory

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From Wikipedia, the free encyclopedia
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Sketch of a circumlunar free return trajectory (not to scale), plotted on the rotating reference frame rotating with the moon. (Moon's motion only shown for clarity)
In orbital mechanics, a free-return trajectory is a trajectory of a spacecraft traveling away from a primary body (for example, the Earth) where gravity due to a secondary body (for example, the Moon) causes the spacecraft to return to the primary body without propulsion (hence the term free).[1]

Many free-return trajectories are designed to intersect the atmosphere; however, periodic versions exist which pass the moon and Earth at constant periapsis, which have been proposed for cyclers.

Earth–Moon
The first spacecraft to use a free-return trajectory was the Soviet Luna 3 mission in October 1959. It used the Moon's gravity to send it back towards the Earth so that the photographs it had taken of the far side of the Moon could be downloaded by radio.

Symmetrical free-return trajectories were studied by Arthur Schwaniger of NASA in 1963 with reference to the Earth–Moon system.[2] He studied cases in which the trajectory at some point crosses at a right angle the line going through the center of the Earth and the center of the Moon, and also cases in which the trajectory crosses at a right angle the plane containing that line and perpendicular to the plane of the Moon's orbit. In both scenarios we can distinguish between:[2]

A circumlunar free-return trajectory around the Moon. The spacecraft passes behind the Moon. It moves there in a direction opposite to that of the Moon, or at least slower than the Moon in the same direction. If the craft's orbit begins in a normal (west to east) direction near Earth, then it makes a figure 8 around the Earth and Moon when plotted in a coordinate system that rotates as the Moon goes around the Earth.
A cislunar free-return trajectory. The spacecraft goes beyond the orbit of the Moon, returns to inside the Moon's orbit, moves in front of the Moon while being diverted by the Moon's gravity to a path away from the Earth to beyond the orbit of the Moon again, and is drawn back to Earth by Earth's gravity. (There is no real distinction between these trajectories and similar ones that never go beyond the Moon's orbit, but the latter may not get very close to the Moon, so are not considered as relevant.)
In both the circumlunar case and the cislunar case, the craft can be moving generally from west to east around the Earth (co-rotational), or from east to west (counter-rotational).

For trajectories in the plane of the Moon's orbit with small periselenum radius (close approach of the Moon), the flight time for a cislunar free-return trajectory is longer than for the circumlunar free-return trajectory with the same periselenum radius. Flight time for a cislunar free-return trajectory decreases with increasing periselenum radius, while flight time for a circumlunar free-return trajectory increases with periselenum radius.[2]

The speed at a perigee of 6555 km from the centre of the Earth for trajectories passing between 2000 and 20 000 km from the Moon is between 10.84 and 10.92 km/s regardless of whether the trajectory is cislunar or circumlunar or whether it is co-rotational or counter-rotational.[3]

Using the simplified model where the orbit of the Moon around the Earth is circular, Schwaniger found that there exists a free-return trajectory in the plane of the orbit of the Moon which is periodic. After returning to low altitude above the Earth (the perigee radius is a parameter, typically 6555 km) the spacecraft would start over on the same trajectory. This periodic trajectory is counter-rotational (it goes from east to west when near the Earth). It has a period of about 650 hours (compare with a sidereal month, which is 655.7 hours, or 27.3 days). Considering the trajectory in an inertial (non-rotating) frame of reference, the perigee occurs directly under the Moon when the Moon is on one side of the Earth. Speed at perigee is about 10.91 km/s. After 3 days it reaches the Moon's orbit, but now more or less on the opposite side of the Earth from the Moon. After a few more days, the craft reaches its (first) apogee and begins to fall back toward the Earth, but as it approaches the Moon's orbit, the Moon arrives, and there is a gravitational interaction. The craft passes on the near side of the Moon at a radius of 2150 km (410 km above the surface) and is thrown back outwards, where it reaches a second apogee. It then falls back toward the Earth, goes around to the other side, and goes through another perigee close to where the first perigee had taken place. By this time the Moon has moved almost half an orbit and is again directly over the craft at perigee. Other cislunar trajectories are similar but do not end up in the same situation as at the beginning, so cannot repeat.[2]

There will of course be similar trajectories with periods of about two sidereal months, three sidereal months, and so on. In each case, the two apogees will be further and further away from Earth. These were not considered by Schwaniger.

This kind of trajectory can occur for similar three-body problems. The problem is an example of a circular restricted three-body problem.

While in a true free-return trajectory no propulsion is applied, in practice there may be small mid-course corrections or other maneuvers.

A free-return trajectory may be the initial trajectory to allow a safe return in the event of a systems failure; this was applied in the Apollo 8, Apollo 10, and Apollo 11 lunar missions. In such a case a free return to a suitable reentry situation is more useful than returning to near the Earth, but then needing propulsion anyway to prevent moving away from it again. Since all went well, these Apollo missions did not have to take advantage of the free return and inserted into orbit upon arrival at the Moon. The atmospheric entry interface velocity upon return from the Moon is approximately 36,500 ft/s (11.1 km/s; 40,100 km/h; 24,900 mph)[4] whereas the more common spacecraft return velocity from low Earth orbit (LEO) is approximately 7.8 km/s (28,000 km/h; 17,000 mph).

Due to the lunar landing site restrictions that resulted from constraining the launch to a free return that flew by the Moon, subsequent Apollo missions, starting with Apollo 12 and including the ill-fated Apollo 13, used a hybrid trajectory that launched to a highly elliptical Earth orbit that fell short of the Moon with effectively a free return to the atmospheric entry corridor. They then performed a mid-course maneuver to change to a trans-Lunar trajectory that was not a free return.[5] This retained the safety characteristics of being on a free return upon launch and only departed from free return once the systems were checked out and the lunar module was docked with the command module, providing back-up maneuver capabilities.[6] In fact, within hours after the accident, Apollo 13 used the lunar module to maneuver from its planned trajectory to a circumlunar free-return trajectory.[7] Apollo 13 was the only Apollo mission to actually turn around the Moon in a free-return trajectory (however, two hours after perilune, propulsion was applied to speed the return to Earth by 10 hours and move the landing spot from the Indian Ocean to the Pacific Ocean).

Earth–Mars
A free-return transfer orbit to Mars is also possible. As with the Moon, this option is mostly considered for crewed missions. Robert Zubrin, in his book The Case for Mars, discusses various trajectories to Mars for his mission design Mars Direct. The Hohmann transfer orbit can be made free-return. It takes 250 days (0.68 years) in the transit to Mars, and in the case of a free-return style abort without the use of propulsion at Mars, 1.5 years to get back to Earth, at a total delta-v requirement of 3.34 km/s. Zubrin advocates a slightly faster transfer, that takes only 180 days to Mars, but 2 years back to Earth in case of an abort. This route comes also at the cost of a higher delta-v of 5.08 km/s. Zubrin writes that faster routes have a significantly higher delta-v cost and free-return duration (e.g. transfer to Mars in 130 days takes 7.93 km/s delta-v and 4 years on the free return), and so he advocates for the 180-day transfer.[8] A free return is also the part of various other mission designs, such as Mars Semi-Direct and Inspiration Mars.

There also exists the option of two- or three-year free-returns that do not rely on the gravity of Mars, but are simply transfer orbits with periods of 2 or 1.5 years, respectively. A two-year free return means from Earth to Mars (aborted there) and then back to Earth all in 2 years.[9] The entry corridor (range of permissible path angles) for landing on Mars is limited, and experience has shown that the path angle is hard to fix (e.g. +/- 0.5 deg). This limits entry into the atmosphere to less than 9 km/s. On this assumption, a two-year return is not possible for some years, and for some years a delta-v kick of 0.6 to 2.7 km/s at Mars may be needed to get back to Earth.[10]

NASA published the Design Reference Architecture 5.0 for Mars in 2009, advocating a 174-day transfer to Mars, which is close to Zubrin's proposed trajectory.[11] It cites a delta-v requirement of approximately 4 km/s for the trans-Mars injection, but does not mention the duration of a free return to Earth.

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The Oberth effect is a phenomenon in rocketry that describes how a spacecraft can achieve greater efficiency and speed when its engines are fired at high speeds, particularly during maneuvers near a gravitational body.
Definition and Explanation
The Oberth effect is named after the German physicist Hermann Oberth, who first described it in the early 20th century. It states that a rocket or spacecraft generates more kinetic energy when it fires its engines at high speeds compared to when it does so at lower speeds. This increased efficiency occurs because the kinetic energy (KE) of an object is proportional to the square of its velocity, as expressed in the formula \(KE = \frac{1}{2} mv\^2\), where
m
m is mass and
v
v is velocity.
Wikipedia
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How It Works
When a spacecraft is in a gravitational well (like near a planet), it can gain additional speed by firing its engines while falling towards the planet. The gravitational pull accelerates the spacecraft, and when the engines are ignited at this high speed, the resulting increase in kinetic energy is greater than if the engines were fired at a slower speed. This principle makes the Oberth maneuver particularly useful for maximizing the efficiency of fuel usage during space missions.
Wikipedia
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Practical Applications
Powered Descents: During landings on celestial bodies, firing engines at high speeds allows for more effective deceleration and control.
1
Gravity-Assists: Spacecraft can use the gravitational pull of planets to gain speed. By timing engine burns during close approaches, they can maximize the Oberth effect and achieve significant velocity increases.
2
Multi-Stage Rockets: The Oberth effect is also crucial in multi-stage rocket designs, where upper stages can achieve greater kinetic energy than the total chemical energy of the propellants they carry.
1

3 Sources
Conclusion
The Oberth effect is a fundamental concept in astrodynamics that highlights the relationship between velocity and propulsion efficiency. By strategically planning engine burns at high speeds, spacecraft can optimize their energy expenditure, conserve fuel, and enhance mission capabilities, making it a vital principle in modern space exploration.
diversedaily.com
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Canada’s Cold Fusion Breakthrough: The Energy Shift No One Saw Coming
Last Updated on November 15, 2025 by Alex Ramirez

Multiple experiments confirmed the breakthrough.

A reaction sustained for nearly two full days.
A steady output of excess heat, proving net energy gain.
Helium formation inside the sealed chamber, matching predicted fusion signatures.
No neutron radiation or dangerous byproducts.
A reactor that remained cool throughout the process.

Inside the palladium-based lattice, hydrogen atoms are stripped of some of their electrons and forced into dense arrangements. The superconductive environment enables electrons to move as collective waves rather than orbiting individual atoms. This creates partial electron shielding, reducing proton repulsion.

Artificial intelligence continuously monitors atomic spacing, adjusting magnetic confinement with microscopic precision. As the distance between hydrogen nuclei falls, the probability of quantum tunneling increases sharply. When tunneling occurs, two hydrogen nuclei merge into helium, releasing energy as heat.

This heat arises from the mass difference between the hydrogen nuclei and the resulting helium atom. Yet, unlike hot fusion or fission, cold fusion produces no harmful radiation. The process follows a low-energy nuclear pathway that avoids the dangerous emissions associated with other nuclear reactions.

This is nuclear power transformed—clean, safe, and fundamentally different from the reactors of the twentieth century.

Elon Musk Revealed Big Upgrade on Starship V4 Shocked NASA!
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