It perverts the technique scientists already use now to look for distant planets around other stars.
This method depends on staring at these suns, hoping to catch an object passing in front.
The US space agencys Kepler telescope has identified more than a thousand planets this way.
When the transit takes place, the laser would be switched on to compensate for the dip in light.
It doesnt have to be one huge laser; it could be an array positioned around the Earth.
The energy needed is comparable to that collected by the International Space Station in a year.
These are a suite of gases that include oxygen, ozone and methane.
source: www.techworm.net
