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#megaprojects

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@jexner @sundogplanets

Sorry for the delay in replying! Let’s be clear upfront: we can’t build a fully operational space elevator with today’s technology.

But history shows us that what seems impossible today can become reality tomorrow. When President John F. Kennedy set the goal of landing a man on the Moon in 1961, many thought it was a pipe dream. Yet less than a decade later, the Apollo program succeeded, proving that with determination, innovation, and investment, the impossible can be achieved. So, while ambitious, a space elevator is a plausible future project.

Trying to be as objective as I can, here’s a more nuanced take on feasibility — starting with economics. A space elevator would be expensive; estimates vary, but it’s safe to say it would be a multi-billion-dollar project. To put that in perspective: SoFi Stadium cost $4.9 billion, and the Apollo program cost about $203 billion (adjusted to 2015 dollars). Expert analyses estimate the cost of the first space elevator between $6 billion and $100 billion depending on design and infrastructure included. So financially, it’s ambitious but plausible, especially as a long-term infrastructure investment with transformative potential for space access and sustainable resource use.

The technical challenges are immense, but so are those of every large, unprecedented undertaking. Picture a tether anchored to a mobile ocean platform, gently swaying with the waves, while robotic climbers ascend and descend, carrying cargo and passengers to the stars.

Several organizations, including the International Space Elevator Consortium, are actively developing the technologies and infrastructure needed. While we’re far from the finish line, the potential benefits—significantly reduced launch costs, increased space access, and large-scale space-based solar power—are exciting.

A key technical hurdle is finding a material with sufficient tensile strength. Though it might sound counterintuitive, a space elevator is more like a suspension bridge to space than a giant tower. The concept evolved from building “bottom-up” to a “top-down” approach, where a geostationary satellite deploys a cable down to Earth. Currently, carbon nanotubes (CNTs) and ultra-high molecular weight polyethylene (UHMWPE) are leading candidates for tether materials. For example, Shizuoka University in Japan is prototyping and testing high-tensile-strength materials in space. The key issues remain: producing suitable materials like carbon nanotubes at scale.

In conclusion, while we can’t build a fully operational space elevator today, overcoming the technical difficulties in the near future is possible. With continued advances in materials science, engineering, and technology, we may soon see the space elevator shift from futuristic fantasy to game-changing reality.

I’m no space engineering expert, so I welcome corrections and insights.
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References & Further Reading
- Edwards, Bradley C. “The Space Elevator.” nss.org/wp-content/uploads/201
- Gao, Tianrui. “The Feasibility Analysis of a Space Elevator.” ijetch.org/2024/IJET-V16N4-129
- International Space Elevator Consortium — Annual Studies isec.org/studies/#ApexAnchor

Recommended Videos
- Space Elevators: Strategies & Status — youtu.be/V0ju74IqW0A
- Clean Energy From Space? — youtu.be/iNqCAvL1T1Y
- Asteroid Mining — youtu.be/3-3DjxhGaUg
- Everyone is Wrong About Asteroid Mining — youtu.be/p3hlnL2JN8E

CC: @cy @isecdotorg @sorceressofmathematics @goodmirek @tiotasram @Ifrauding @Elrick_Winter @tiotasram @davidtheeviloverlord

#SpaceElevator #FutureTech #SpaceExploration #Innovation #ScienceFiction #Engineering #SpaceTravel #CarbonNanotubes #UHMWPE #FeasibilityStudy #SpaceAccess #SustainableTech #SpaceResearch #SpaceEngineering
#SpaceTechnology #SpaceEconomics #SpaceInnovation #SpaceDevelopment
#megaprojects #SpaceTower #Megastructure

More than 300 #HumanRights activists were killed in 2019, report reveals

#Colombia was the bloodiest nation with 103 murders and the #Philippines was second, followed by #Brazil, #Honduras and #Mexico

by Nina Lakhani, 14 Jan, 2020

"More than 300 human rights defenders working to protect the #environment, #FreeSpeech, #LGBTQ+ rights and #IndigenousLand in 31 countries were killed in 2019, a new report reveals.

"Two-thirds of the total killings took place in #LatinAmerica where impunity from prosecution is the norm.

"Colombia, where targeted violence against community leaders opposing environmentally destructive #megaprojects has spiraled since the 2016 peace accords, was the bloodiest nation with 106 murders in 2019. The Philippines was the second deadliest country with 43 killings, followed by Honduras, Brazil and Mexico.

"2019 was characterized by waves of social uprisings demanding political and economic changes across the globe from Iraq and Lebanon in the Middle East to Hong Kong and India in Asia and Chile in the Americas.

"The report by #FrontLineDefenders (#FLD) details the physical assaults, defamation campaigns, digital security threats, judicial harassment, and gender-based attacks faced by human rights defenders across the world, who were on the frontline of protests against deep seated #inequalities, #corruption and #authoritarianism.

"In the cases for which the data is available, the report found:
• 85% of those killed last year had previously been threatened either individually or as part of the community or group in which they worked.

• 13% of those reported killed were women.

• 40% of those killed worked on land, #IndigenousPeoples and environmental issues.


"In nearly all countries that experienced mass protests last year, human rights defenders – who mobilized #marches, documented police and military abuses, and helped citizens who were injured or arrested – were specifically targeted.

"For instance, in #Chile, in the biggest anti-government protests since the end of the Augusto Pinochet dictatorship, at least 23 people were killed and 2,300 injured, with scores blinded by non-lethal projectiles.

"In #Iraq, where #Anticorruption protests during October and November left more than 300 people dead, Saba Al Mahdawi was abducted and held for nearly two weeks by unidentified militants. She was most likely targeted as a result of her work providing food, water and medical aid to injured protesters.

"#Honduras, a key geopolitical US ally, has been one of the most dangerous countries in the world to be a woman, lawyer, journalist and land or environmental defender since the 2009 military-backed coup unleashed a wave of unchecked violence. Last year, targeted killings in the Central American country increased fourfold compared to 2018, as tens of thousands of people fled a toxic mix of violence, poverty and corruption, and journeyed overland through Mexico to the US southern border in search of security.
Yet despite difficult and frightening circumstances, human rights activists have continued to spearhead positive social changes.

"For instance, #Mexican #reproductiverights defenders celebrated the legalisation of abortion in the state of Oaxaca – following in the footsteps of Mexico City 12 years earlier. While in Jordan, lawmakers withdrew the cybercrime bill, which proposed restrictions to the freedom of speech and the right to privacy, after a high-profile campaign by civil society groups.

"Andrew Anderson, executive director of FLD, said: 'In 2019, we saw human rights defenders on the frontlines defending and advancing rights in Hong Kong, Chile, Iraq, Algeria, Zimbabwe, Spain and many other cities and towns around the world. And despite repression, they continue to advance visions of their societies and the world that put to shame not only their own governments and leaders, but also the international community.'"

theguardian.com/law/2020/jan/1

The Guardian · More than 300 human rights activists were killed in 2019, report revealsBy Nina Lakhani