Tag: Dyson sphere

Could a Dyson Sphere Harness the Full Power of the Sun?

by Seeker                  February 24, 2019                   (seeker.com)

• Physicist Freeman Dyson popularized the concept of a structure soaking up 100 % of a star’s (like our Sun) and converting it into useful energy, known as a Dyson Sphere. Dyson claimed that looking for signs of massive structures capturing the power of a host star in distant solar systems could lead us to advanced extraterrestrial civilizations.

• Some believe that aliens might already be using a Dyson Sphere on a mysterious dimming star known as Tabby’s star, theorizing that the dimming is a sign of a structure surrounding the star. Other astronomers say that the dimming is likely just caused by dust.

• But astro-engineers say that a Sun-encircling sphere would be impractical, as the environmental and gravitational stresses of a solid structure around the Sun would certainly destroy the shell, even if we had the materials needed to do it. They suggest that the answer may be a ‘Dyson Swarm’ – a large number of advanced solar panels orbiting the Sun, capturing its light from all directions, and continuously transmitting the energy back to Earth.

• Futurists say building a Dyson Swarm would require extreme measures like mining Mercury for materials – eventually destroying that planet. But a successfully implemented Dyson Swarm could extend humanity’s survival in the solar system and provide the power needed to colonize other planets.

 

In a thought experiment, Physicist Freeman Dyson popularized the concept of a structure that could trap 100 percent of a star’s energy. Dyson claimed that advanced civilizations or extraterrestrials might use massive structures to capture the power of their host star. He said that looking for signs of these structures would lead us to other lifeforms. This concept inspired what later became known as a Dyson Sphere – a hypothetical megastructure that would surround the Sun, soaking up its light and converting it into useful energy.

Today, there are a few different Dyson inspired designs. The classic Dyson Shell, for instance, is often portrayed in sci-fi works. The solid structure, the size of a planetary orbit, contains solar habitats, each powered by their host star’s light. But this megastructure would be impossible for humanity to pull off due to the fact that the materials needed to build it don’t exist. On top of that, environmental and gravitational stresses of the Sun would destroy the shell.

Instead, some astro engineers believe a Dyson Swarm is the most practical design for our solar system. This concept would require the construction of an army of advanced solar panels which would orbit the Sun, capturing its light from all directions. The solar panels would collect the Sun’s radiation and continuously transmit the energy wirelessly back to Earth. Still, futurists say building a Dyson Swarm would require extreme measures like mining Mercury for materials – eventually destroying the planet. But if we manage to successfully create a sun sucking megastructure, it will extend humanity’s survival in the solar system and provide the power needed to colonize other planets. Considering all the advanced technology needed to make this happen though, it will be a very long time until any sort of Dyson Sphere takes the leap from science fiction to reality.

But, like Freeman Dyson, some people believe that aliens might already be using Dyson Sphere-like structures. And they point to a mysterious dimming star – known as Tabby’s Star – as potential evidence. Believers say that the dimming is a sign of a structure surrounding the star. While many astronomers say that the dimming is likely just caused by dust. But in the far-fetched chance that there is an advanced civilization out there soaking up all the energy in the universe, let’s just hope that they’ll use their power for good, not evil.

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Alien ‘Artifacts’ Made By Civilizations From Mars or Venus Could Be Hidden On Earth, NASA Study Suggests

by Jasper Hamill                     December 26, 2018                     (metro.co.uk)

• Dozens of NASA space scientists teamed up to explore how our species could detect ‘technosignatures’, ie: the name for pieces of evidence which give away the presence of advanced alien civilizations – radio waves are detected coming from a distant star system, or Dyson Sphere ‘megastructure’ power stations surrounding a star in order to harvest its’ energy, for example.

A November 28, 2018 NASA report entitled “NASA and the Search for Technosignatures” suggests that the truth about extraterrestrials could be lurking right under our noses. In a new report, scientists suggest that our own planet may be hiding alien ‘artifacts’, some of which may even have been built by extinct civilizations who lived on Mars, Venus or even Earth.

• ‘Because the geological, paleontological, and archaeological records on Earth are so incomplete, it is even possible that the Earth itself hosts such (extraterrestrial) artifacts, although, again, this idea is often conflated with unscientific popular imaginings and science fiction stories about alien visitation, and so must be approached carefully,’ the NASA researchers wrote.

• The report continues, ‘If technosignatures were discovered in the solar system, it would be worth considering whether their origin might not be interstellar. Specifically, since the Earth is home to the only known species capable of interstellar communication and planetary travel (although both technologies remain in their early development), the Earth remains the only known planet fecund enough to promote technological life, and so it or an early, habitable Mars or Venus could even be the origin of such technology.’

• The NASA report noted that ‘Technosignatures in the solar system might come in the form of free-floating probes or structures—either passing through the solar system or in orbit around the Sun or other body—or in the form of structures or other signs of technologies on planetary surfaces.’

• So far, the only potential alien artifact we’ve seen has been ‘Oumuamua’, the first ‘interstellar visitor’ to be observed in our stellar neighborhood after traveling here in 2017 through deep space. Still, most scientists believe its origins are natural rather than artificial. Oumuamua changed direction as it passed the sun, which may have been caused by a natural process called outgassing – although there is a very slight chance this could have been the result of it being steered somehow.  (see previous ExoNews article on the Oumuamua visitor here)

 

You might think that humanity’s best chance of finding alien life involves peering deep into space and analysing faraway galaxies.

But a Nasa study has suggested the truth about extraterrestrials could be lurking right under our noses.

Dozens of space scientists have teamed up to explore how our species could detect ‘technosignatures’, the name for pieces of evidence which give away the presence of advanced alien civilisations.

Some of these tell-tale signs are obvious. For instance, if loads of radio waves are detected coming from a distant star system, then it could be a clue which shows it’s inhabited by intelligent extraterrestrial organisms.

We could also search for alien societies by looking for ‘megastructures’ called Dyson Spheres, which are theoretical power stations built surrounding a star to harvest its energy.

These would be easy to spot because they are likely to be gigantic and block out starlight whenever they pass in front of their sun.

Other technosignatures are harder to identify, such as evidence that a planet has been polluted by heavy industry.

In the new report, scientists also make the fascinating suggestion that our own planet may be hiding alien ‘artefacts’, some of which may even have been built by extinct civilisations which lived on Mars, Venus or even Earth.

‘Because the geological, paleontological, and archaeological records on Earth are so incomplete, it is even possible that the Earth itself hosts such artefacts, although, again, this idea is often conflated with unscientific popular imaginings and science fiction stories about alien visitation, and so must be approached carefully,’ researchers wrote.

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Strange Twinkling Star Detected

Space                  November 18, 2018                    (earth-chronicles.com)

• Astronomers have discovered a strange flickering star, resembling a Tabby star, in which case an alien mega-structure was supposed to be present, like a Dyson sphere. (see previous ExoNews article on the Tabby Star)

• The behavior of the new star is not associated with aliens. However, astronomer Roberto Saito of the Federal University of Santa Catarina in Florianópolis, Brazil, argues that it is extremely unusual. “We don’t know what the object is,” says Saito. “And this is interesting.”

• Saito and his colleagues were looking for supernovae and found a star flashing brightly. Then the star suddenly faded. From 2010 to 2018, the brightness of the star either increased, then decreased, without any regularity, reminiscent of Tabbi’s star. The team named the object VVV-WIT-07 (WIT is an abbreviation of “What is this?”).

• A team of astronomers intend to continue observing the star using larger telescopes like the 8.1-meter Gemini or ALMA telescope located in Chile.

[Editor’s Note] Tabby’s Star is named after Tabetha Boyajian, the Louisana State University astrophysicist who discovered it on 2015. The stars luminosity changes, leading to speculation that it may be surrounded by anything from space debris to an alien-made Dyson sphere megastructure surrounding the star and harvesting its energy for space travel, manufacturing or other energy-consuming activities.

 

Astronomers who looked for supernovae, found an object that behaves more amazing than the star Tabbi.

Astronomers have discovered a strange flickering star, resembling a Tabby star, in which case an alien mega-structure was supposed to be present, like a Dyson sphere.

The idea of a megastructure, first proposed in 2015, was later refuted by data suggesting that the strange flickering is due to dust particles obscuring the star’s light. The behavior of the new star, it seems, is also not associated with aliens. However, astronomer Roberto Saito of the Federal University of Santa Catarina in Florianópolis, Brazil, argues that it is extremely unusual. Together with his colleagues, the scientist wrote an article about it, published in the arXiv.org preprint database.

“We don’t know what the object is,” says Saito. “And this is interesting.”

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