This is not within my area of expertise, but I have long speculated that large fields of mirrors could offer a practical approach to defending the earth from asteroids. I think this concept just got a boost from the Heliogen development. As a side benefit, the fields could serve as power sources when not needed for defense.
Comments & Sharing
Let's Change the World
Become a member of The Planetary Society and together we will create the future of space exploration.