Tag

Dyson Sphere

All articles tagged with #dyson sphere

science5 days ago•4 min saved

Webb Dismisses Two Dyson Sphere Candidates as Background Galaxies

NASA's James Webb Space Telescope, in Project Hephaistos, studied two M-dwarf stars previously flagged for potential Dyson Spheres and found the infrared excess arose from background galaxies, not megastructures; the two candidates are ruled out, highlighting the difficulty of technosignature searches and the potential for future higher-resolution infrared surveys in the 2030s to separate signals from foreground/background sources.

via Universe Today|

#dyson-sphere #infrared-astronomy #james-webb-space-telescope

space1 month ago•7 min saved

JWST Finds Two Dyson-Sphere Candidates Were Just Galaxies Aligned Behind Stars

Astronomers used the James Webb Space Telescope to test two strong Dyson-sphere candidates by hunting for the telltale mid-infrared waste heat that would accompany a megastructure around a star. After sifting through about five million Milky Way stars and confirming the most promising cases, JWST revealed that both candidates were actually distant galaxies almost perfectly aligned behind foreground stars, producing the infrared excess. One is a hot dust-obscured galaxy; the other a dusty starburst. While the false positives rule out these two Dyson-sphere interpretations, they refine search methods and lay groundwork for future telescopes with adaptive optics to separate stars from background galaxies.

via ScienceAlert|

#background-galaxies #dyson-sphere #infrared-astronomy

science1 month ago•202 min saved

Musk’s Kardashev Dream: Could SpaceX Satellites Spark a Type II Civilization?

Elon Musk cites the Kardashev scale—the energy-based framework for classifying civilizations—to frame SpaceX’s plan for up to a million satellites as a first step toward a Type II civilization powered by space-based solar energy; the piece explains the scale’s history (Kardashev’s original three types and Carl Sagan’s refinements), notes humanity is currently around Type 0.7, and cautions that achieving Type II would require enormous mass and infrastructure (think Dyson-sphere-like concepts), making it a provocative but speculative goal.

via CNN|

#dyson-sphere #elon-musk #kardashev-scale

science1 year ago•1 min saved

What If Voyager 1 & 2 Collide with a Dyson Sphere at 55,000 kmph?

The article explores the hypothetical scenario of Voyager 1 and 2 colliding with a Dyson Sphere, a massive alien megastructure, discussing potential outcomes, perceptions by alien builders, and the symbolic significance of such a journey for humanity's presence in the cosmos.

via WION|

#dyson-sphere #extraterrestrial #interstellar

astronomy2 years ago•5 min saved

"Scientists Debate Alien Dyson Sphere Candidates in Our Galaxy"

Seven candidate Dyson spheres identified by Project Hephaistos may actually be distant, dusty quasars, raising questions about their true nature. While some astronomers suggest these candidates could be extreme debris discs or background contamination from "Hot DOGs" (dust-obscured galaxies), further spectroscopic observations, potentially using the James Webb Space Telescope, are needed to confirm their identity.

via physicsworld.com|

#astronomy #dyson-sphere #infrared-radiation

science-and-technology3 years ago•0 min saved

"Jupiter as a Resource for Building a Dyson Sphere Around the Sun"

To construct a Dyson sphere around the Sun, we would need an astronomical amount of resources, including demolishing a Jupiter-sized planet for raw materials, according to science journalist Jaime Green. However, astrophysicist Jason Wright believes that constructing a Dyson sphere could be compared to building Manhattan, with each generation adding a little bit more to the megastructure. Wright argues that if the energy is available and will just dissipate into space, it makes sense to harness it.

via Slashdot|

#dyson-sphere #energy #jupiter

science-and-technology3 years ago•3 min saved

The Cost-Benefit Analysis of Constructing a Dyson Sphere.

Physicists explore the feasibility of building a Dyson sphere around our sun to capture solar energy. While the technology to build such a structure is not yet available, the thought experiment can help us understand fundamental principles of energy, orbit, and motion. Building a Dyson sphere would require a significant energy investment, and the optimal design would need to minimize this initial cost. Simplifying the problem helps cover up mistakes and enables a general sense of feasibility.

via Ars Technica|

#dyson-sphere #energy-investment #feasibility