Signal takes a long time to get here.

Discussion in 'Science, Technology & Space' started by Bill Boddy, Mar 2, 2018.

  1. Bill Boddy

    Bill Boddy Professional layabout Premium Contributor

    Scientists in Australia have detected great clouds of hydrogen which have been excited by ultraviolet light into a state where it absorbed radiation at a radio frequency of 1.4 gigahertz. Due to the expansion of the universe the detection of the radio waves were actually discovered at 78 MHz.

    This happened only(!) 118 million years after the Big Bang which is earlier than the first light could be seen at 560 million years after BB. It is suspected that early hydrogen atoms may have interacted with dark matter which has got scientists more excited than the hydrogen.

    Signal detected from 'cosmic dawn'
     
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  3. FB

    FB Not my cup of cake Valued Member

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    I would give you a like for this Bill Boddy but I haven't got a bleedin' clue what it's all about.
     
  4. Titch

    Titch Outdated old biddy Premium Contributor

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    The critical few words Bill Boddy are ...”it is suspected “. A long way from fact. But a new way to go to keep the terminally curious going for a few decades.

    :D
     
  5. Dartman

    Dartman Points Scorer

    So if there is a Big Bang, surely that would produce intense light, so the period of dark may be because the Big Bang blinded everything and it was only a false dark period, though that may have been the case one would have to translate all that into MHz and GHz. Perhaps that is too simple or may be I've got it wrong 78MHz is an FM frequency and 1.4GHz is in the satellite transmission frequency range, did they get a picture that wasn't on Sky and a taxi firm using the 78MHz for a pick up? as Titch says "suspected" more like high tech suspicious:ermmm::rolleyes::shocked::whistle:LOL
     
  6. Titch

    Titch Outdated old biddy Premium Contributor

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    And don’t forget that dark matter is still pretty elusive, to say the very least.
     
  7. Dartman

    Dartman Points Scorer

    Only in the dark:whistle:
     

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