Mission scientist reacts to historic first images from the surface of a comet

This week marks the pinnacle of the professional careers of many scientists, when the European Space Agency plans to put down a three-legged robotic lander on a comet, a risky first-of-a-kind endeavor that could rewrite textbooks on the history of the solar system.

Amateur astronomers around the globe have a ringside seat as Comet 2013 A1 (Siding Spring) hurtles through space en route to an incredibly close encounter with the planet Mars on Sunday, 19 October.

When a European landing probe goes for a daring touchdown on a comet Wednesday, officials say it would help to have a little luck on their side.