Image: ESA/ATG medialab; Comet image: ESA/Rosetta/Navcam
This is the first time a man-made craft has landed on a comet. Rosetta was launched in 2004, on a mission to rendezvous with a comet, send a lander to it, and escort the comet to observe any changes to the comet on its path around the sun.
On its travels to the comet, Rosetta has flown by Earth three times, Mars once, and an asteroid. It was also forced into a 31 month hibernation, to conserve energy. It awoke in January 2014 and continued its journey to the comet, culminating in the landing of Philae.
Though the landing can be considered successful, in that Philae made it down in one piece, the harpoons meant to hold it onto the comet did not fire upon landing, raising concerns about how stable it is, on the surface.
More information on the Rosetta mission can be found on the European Space Agency website.
Books on comets and asteroids:
The solar system : a visual exploration of the planets, moons, and other heavenly bodies that orbit our sun / written by Marcus Chown.
Bestselling author Marcus Chown leads us on a grand tour through the incredible diversity of planets, moons, asteroids, comets, and spacecraft that surround the Sun in our cosmic backyard. Illuminating his insightful and surprising text are a wealth of beautiful images and diagrams, printed in full colour, richly detailed and accurately based on real scientific data. (Syndetics summary)
Near-Earth objects : finding them before they find us / Donald K. Yeomans.
“Humans may fret over earthquakes, nuclear meltdown, and heart attacks, but only collision with a near-Earth object has “the capacity to wipe out an entire civilization with a single blow.” Balancing the wonders of astronomy with the looming potential for an epic, planetwide disaster, Yeomans, a fellow and research scientist at NASA’s Jet Propulsion Laboratory, explores the origins of near-Earth objects-asteroids, comets, meteors, and meteoroids-and the threat they can pose to our planet. Though brief, Yeomans’s book is an accessible and far-ranging primer on the science of near-Earth objects.” (Adapted from Publisher Weekly)
Books for the Kids:
Comets, asteroids, and meteors / Stuart Atkinson.
“What are comets and asteroids like, and could we ever visit one? Taking the form of an imaginary trip, this book explores the science and history of these objects, looking at recent studies and possibilities for the future.” (Amazon.co.uk)
The lonely existence of asteroids and comets / by Mark Weakland ; illustrated by Carlos Aón.
“It can be tricky to keep all those chunks floating around in space comets, asteroids, meteors straight. And though these space rocks don’t have quite the brain-bendingly cool allure of other cosmic wowers like black holes and supernovae, they provide a solid thematic bedrock for a wide-ranging tour of the vastness of the universe in this graphic-format title in the Adventures in Science series.” (Adapted from Booklist)
Further online Rosetta reading:
— The Guardian – Why is the Rosetta landing so exciting: This article gives a good, basic outline of the mission, and why we should be excited!
— Stuff.co.nz – Philae landing: An article on the landing of Philae.
— Stuff.co.nz – Philae landing-Malfunctions made Philae bounce kilometre off comet: Outlines what didn’t quite work with the landing, and gives a history of man’s landings on other worlds.
— Wikipedia – Rosetta: Wikipedia’s article on Rosetta.
— Wikipedia – Philae: Wikipedia’s article on Philae.