The asteroid Gaspra - a definite "planet killer" : A Gaspra (12.5 x 7 x 7.5 miles) impact would obliterate all life on Earth - never to arise again.
Would you be so kind as to simply explain to me this statement:
"The ability to produce delay-Doppler images of asteroids is exciting but a
bit perplexing. Clearly there is a lot of information in these images,
but, because radar forms images in a way that is quite different from the
way our eyes work, delay-Doppler images are not very intuitive"