Skip to content
sahil.science
Questions
Answers
Topics
Almanac
Papers
About
C⁶
2026
← Questions
Open question
What was the Arecibo Message, and why was it aimed at the globular cluster M13?
Galaxies and Large-Scale Structure
Radio Astronomy
Sources that address it
Arecibo Observatory opens in Puerto Rico
almanac
Related questions
How did Jansky determine that the persistent radio hiss was coming from the direction of the galactic centre?
How did linking eight radio observatories across four continents effectively turn Earth into a single telescope?
What later astronomical discoveries grew out of the field of radio astronomy that Jansky's antenna founded?
Why did radio astronomers initially call objects like 3C 273 'quasi-stellar radio sources'?
How did Arecibo's design use a natural limestone sinkhole to support its 305-metre dish?
How did British astronomers at Jodrell Bank manage to decode Luna 9's images before the Soviets released them?
How did Cyril Hazard use a lunar occultation to pin down the position of 3C 273?
How did Duncan Lorimer and David Narkevic discover the first fast radio burst in archival telescope data?