Extraterrestrial (ET)

Extraterrestrial (ET) means `outside the Earth`
Some scientists believe that ET life could develop
anywhere in the Universe where there is a flow of energy.


  • most scientists believe that if there is ET life anywhere else in the Universe –  it is probably based on the chemistry of carbon, as life on Earth is.
  • if civilisations exist elsewhere – they maybe on planets circling other stars.
  • there is no proof that any ET life form has ever visited Earth.


  • search for Extraterrestrial Intelligence (SETI) is a program for analysing radio signals from space for signs of intelligent life.


Arecibo Observatory, Puerto Rico

  • Arecibo Observatory at Puerto Rico (photo) – beaming out a signal to distant stars to try to communicate with extraterrestrial life. (more information: wikipedia)
  • Unfortunately on 1st December 2020, after suffering damage in recent months before December, the Arecibo Observatory radio telescope in Puerto Rico collapsed on December 1, because of cables that suspended a platform of scientific instruments above the dish snapped, causing the platform to fall into the dish – see the photo below.
    >Watch collapse of the Arecibo Observatory (YouTube)


Did you know?

Gold plaque on the pioneer spacecraft

Pioneer 10 and Pioneer 11

  • the US Spacecraft Probes – Pioneer 10 and Pioneer 11 are flown away from our Earth into deep space with picture message by gold plaques about life on Earth...

  • Pioneer 10
    –  it’s heading away from our Earth generally in the direction of the red star Aldebaran (68 light-years away) – the eye of The Bull in the constellation of Taurus (The Bull).
    –  Pioneer 10 should arrive at Aldebaran in 2 million years time!
  • Pioneer 11
    –  the other outward bound Pioneer 11 is headed into the constellation of Aquila (The Eagle).
    –  in four million years time, Pioneer 11 will pass near one of the stars in that constellation.

Back to The Universe page.

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