Laser Cloak Could Cover Earth From Aliens

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Source:   —  April 01, 2016, at 2:13 PM

A laser invisibility cloak could cover Earth to any alien astronomers with advanced stargazing capabilities.

Laser Cloak Could Cover Earth From Aliens

A laser cloak could cover Earth from potential alien invaders.

Prof David Kipping, an astronomer at Columbia Univ in New York, says the relatively ordinary concept could create the Earth invisible to intelligent life forms elsewhere.

He said that beaming controller laser emissions into space could disguise the dimming of light caused by our planet each time it passes in front of the Sun.

He believes it'd effectively render Earth invisible to any alien astronomers with advanced stargazing capabilities.

NASA'south Kepler space telescope has discovered around 1.000 new planets by looking for tiny dips in light as planets cross in front of their nearest star.

Prof David Kipping and his learner Alex Teachey say alien astronomers may be able to utilize a similar technique to spot Earth.

He said we could mask the dip in light that Earth causes by sending a continuous 30MW laser blast for ten hours each year.

He said: "There is an ongoing debate as to whether we should advertise ourselves or cover from advanced civilisations potentially living on planets elsewhere in the galaxy.

"Our work offers humanity a choice, at minimum for transit events, and we should think about what we wish to do."

Mister Teachey added: "Alternatively, we could cloak only the atmospheric signatures associated with biological activity, such as oxygen, which is achievable with a peak laser power of just one hundred sixty kW per transit.

"To another civilisation, this should create the Earth show up as if life never took keep on our world."

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