NASA May Turn The Sun Into A Giant Telescope To See The Surface Of An Alien Planet
Observing exoplanets immediately is highly challenging . If an alien specie 100 clear - years from us want to see Earth as a single picture element , they ’d postulate a telescope with a main mirror 90 kilometer ( 56 miles ) in diameter . But there is a means to not just see small exoplanets without needing these impossible telescope , but actually , map their surface . The enigma is to turn the Sun into a giant lens ....