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Arecibo

All articles tagged with #arecibo

space1 day ago•11 min saved

Arecibo Message: A 25,000-Year Beacon to the Cosmos

Broadcast in 1974, the Arecibo message was aimed at the M13 globular cluster about 25,000 light-years away and encoded 1679 bits in a 23-by-73 grid to reveal numbers, DNA components, a DNA helix, a human figure, a solar-system map with Earth highlighted, and the transmitter dish. Designed as a demonstration rather than a dialogue, its earliest possible reply would not reach Earth for roughly 25,000 years, with any response arriving no sooner than about 52,000 CE.

via Space Daily|

#arecibo #astronomy #communication

science-and-technology1 year ago•3 min saved

Investigating the Structural Failures Behind Arecibo's Collapse

The collapse of the Arecibo Observatory's telescope in 2020 is attributed to zinc creep in cable sockets, potentially accelerated by electroplasticity due to electromagnetic radiation, according to a National Academies report. The report suggests that the unique electromagnetic environment of the telescope may have hastened the failure, despite a safety factor above two. The NSF plans to replace the telescope with a science education center and is considering the report's recommendations for future projects.

via The Register|

#arecibo #electroplasticity #nsf

science-and-technology2 years ago•2 min saved

Uncovering the Cause: Analyzing the Arecibo Collapse

Forensic analysis of the Arecibo radio telescope collapse has identified bad sockets as the main cause of the failure. The investigation revealed that the manual and inconsistent splay of the wires during cable socketing led to shear stress, causing the molten zinc "spelter socket" to slowly flow around the cable strands and allowing them to slip out of the surrounding steel socket. While there were multiple causes for the collapse, being able to attribute the bulk of the failure to a single defect provides valuable lessons for preventing future failures of cable-supported structures.

via Hackaday|

#arecibo #cable-failure #collapse