1.   As this strong shock wave races outward from the impact site, it raises a storm of dust.

2.   Weather satellite images of the area taken from synchronous orbit show an immense circular area of dense clouds above the impact site.

3.   Both spoke of gigantic plumes of white hot gas and debris rising from an impact site that swept into view a few minutes after Fragment A hit.

4.   Consulting the map of Pluto, he said he had a good candidate for the impact site.

5.   Each day more fragments hit, and since the impact bruises subsided only gradually, there were times when as many as five impact sites were in view.

6.   For the microprobes, the degree of risk depends on whether the impact site turns out to be sand dunes, polar ice or unforgiving solid rock.

7.   Four years ago, researchers identified a likely impact site known as the Chixulub crater.

8.   Once the true impact site was revealed, it turned out that many witnesses in Chile had actually seen the spacecraft disintegrate as it streaked overhead.

9.   That theory remained controversial for years until it was corroborated by other evidence and the impact site was located off the Yucatan peninsula.

10.   The Keck is observing impact sites using seven different colored filters, each one corresponding to the kind of light emitted by different compounds.