Showing all posts tagged: climate change

Space bubbles a Dyson sphere like solution to global warming?

15 June 2022

Dyson spheres are hypothetical mega-structures highly advanced planetary civilisations might construct around their host star to harness as much solar energy as possible to power their needs. Seen from a distance, a Dyson sphere would look like a massive shell almost completely encompassing a star.

It’d be like constructing a giant display case for the Sun. Needless to say building a Dyson sphere is no small undertaking, and would require an enormous quantity of resources, technological smarts, plus an unprecedented level of international cooperation. A single superpower could not take on an engineering feat of this scale alone, it’d be a team effort.

Dyson spheres have been in the news relatively recently. Fluctuations in the light of Tabby’s Star, located about 1,470 light-years from Earth, were puzzling astronomers, and the existence of a Dyson sphere was advanced as a possible explanation, though later ruled out.

While Dyson spheres, something late British American mathematician and physicist Freeman Dyson first wrote about in 1960, are unlikely to feature in our future anytime soon, the concept may help us combat global warming.

A team of MIT scientists have devised a solar filter of sorts, they call space bubbles. In short, a small structure made up of numerous of these space bubbles could be used to form a shield, deflecting a small, though sufficient amount of solar radiation away from the Earth.

The MIT scientists propose placing the space bubbles at the Lagrange point between the Earth and the Sun. Put simply, a Legrange point, is an area between two celestial objects, say the Earth and the Sun, where the gravity of both objects balance each other. For example if a satellite were placed at this Legrange point, it would stay put, and wouldn’t fall towards either the Earth or Sun.

Once in place, the space bubbles would act like an eclipsing body, in this case permanently blocking, or more like filtering, a small amount of the Sun’s rays reaching the Earth. While the proportion of solar radiation “blocked” would be minuscule, the MIT team say if just under two percent of “incident solar radiation” was deflected, current global warming could be fully reversed.

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Earth’s climate change black box

9 December 2021

An aircraft’s black box contains data that may help investigators piece together what caused an accident, and hopefully ensure there isn’t a repeat of whatever went wrong. What then to make of Earth’s Black Box? It is a quadrilateral-like shaped structure that will stand in a geologically stable location, on the west coast of Tasmania, and collect climate data. Like an aircraft flight recorder, the information Earth’s black box stores is intended to one day guide a future civilisation, should global warming spell the demise of ours. Thank you, and have a nice day.

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Burning, a documentary by Eva Orner

9 November 2021

Burning (trailer) is a documentary by Los Angeles based Australian filmmaker Eva Orner about the Black Summer bush fires that ravaged parts of Australia in 2019 and 2020. The two-minute trailer is shocking, but being in the path of the flames must have been terrifying. Burning is scheduled for release later this month.

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