Why do Observatories shoot lasers at the Sky?

The Hubble telescope out in space is unhindered by atmospheric disturbances. The Nursery Rhyme: 'Twinkle, Twinkle Little Star' does not apply in space. Little or big stars do not twinkle. Engineeers on earth are not going to sit and twiddle thumbs to match the twinkling. Being CEans they shoot a laser beam into the sky, create an artificial star outside the atmosphere, analyse the twinkling of this star and compensate the twinkle of the other stars.
Truly amazing application of technology matching any Star Trek activity.

#-Link-Snipped-#

Replies

  • Nayan Goenka
    Nayan Goenka
    It means that twinkle twinkle is actually a joke? It is some artificial crazy lab experiment that is fooling the kids all around the globe? That sounds cruel.
  • oprime
    oprime
    Nayan Goenka
    It means that twinkle twinkle is actually a joke? It is some artificial crazy lab experiment that is fooling the kids all around the globe? That sounds cruel.
    Twinkling of stars is an optical phenomenon and happens due to the earth's atmosphere. All of us have read about it in any high school physics book.

    #-Link-Snipped-#
    #-Link-Snipped-#
  • Jeffrey Arulraj
    Jeffrey Arulraj
    Using a twinkle of a star and a laser twinkle to understand the distortion is far from comprehensing

    Man all the error matching tech and easy removal of noise Is super cool to see how they are practically used

You are reading an archived discussion.

Related Posts

It will be presumptuous on my part to intrude on this:
Recent trend in India is that there is a rapid decrease in the value of money which also affects Automobile sectors.Recent news is that Skoda is planing to increase the...
We all know that Drones are primarily used to spy enemy countries and helping in rescuing operations bit imagine your next door kid having a small drone and spy on...
Anybody knowing about career as a project fellow in NISTADS ?
https://theseoultimes.com/ST/?url=/ST/db/read.php?idx=7333 https://en.m.wikipedia.org/wiki/Child_cannibalism The links above speak of some disturbing news! God help us humans! This is received by most people through e-mail and it definitely accounts for some human right...