Sending a mission to the solar gravitational lens (SGL) is the most effective way of actually directly imaging a potentially habitable planet, as well as its atmosphere, and even possibly some of its ...

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The twenty-first century has been characterized by the increase in energy demand with new requirements, such as environmental care, renewable energy, and independence from fossil fuel reserves 1,2.

For more than a century, gravity has been the immovable backdrop of modern physics, a force that can be described and exploited but never truly switched off. Now a former NASA engineer says he has ...