November 12, 2014

Philae lander touched down Wednesday on the comet Churyumov-Gerasimenko, also known as 67p, after a 10 year journey that cost as much as $1.3 billion. You might be wondering why the European Space Agency spends so much time and resources on a frozen lump of ice millions of miles away. But this mission, which successfully landed the first ever probe onto our solar system’s most primitive material, will give us valuable information about the origins of our solar system and how it evolved.

Write to Arpita Aneja at arpita.aneja@time.com.

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