With the ability to emit a continuous 30 MW laser for about 10 hours, once a year, it would be enough to hide us from alien life, at least in the visible light.
Stephen Hawking has several times aware the humanity against highlighting our existence to alien life.
He has concluded that any civilization with which humanity could communicate is probably much older and technologically advanced than us.
In simple, they could potentially kill us and destroy our planet.
Needless-to-say, Hawking isn’t the only scientist to have this thought.
Hiding From Alien Life
That being said; the astronomers at Columbia University in New York have the answer to staying hidden from other world threats. Professor David Kipping and his graduate student Alex Teachy say that humanity can use lasers to conceal earth from being found by alien civilizations.
To make it clear, astronomers try to find other Earth-like planets by looking for dip in light when planet moves directly in front of star that it orbits.
With that, if some far-off alien civilization is using the same method, our visibility could be easily masked by this controlled laser emission, provided that the beam is directed at the star where aliens might be living.
Also, when our earth moves in front of Sun, the laser will be switched on in order to compensate for the dip in light.
Kipping says, “There is an ongoing debate as to whether we should advertise ourselves or hide from advanced civilizations. Our work offers humanity a choice.”
Moreover, it was suggested that just by emitting a continuous 30 MW laser for roughly 10 hours and that too only once a year would be enough to eliminate this dip at least in visible light. However, a chromatic cloak, which is effective at all wavelengths, is a much challenging task.
Teachy also said, “Alternatively, we could cloak only the atmospheric signatures associated with biological activity. This should make the Earth appear as if life never took hold on our world.”
The question here is, what if aliens already know about laser cloaking technique and they might be doing it themselves? Scientists believe this is possible and could potential help in the near future.
A question to my readers…
Do we really want to seek an extraterrestrial life that hate visitors?