That question comes from Daniel Hernandez Carillo in Monclova in Mexico.
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Results from the Rosetta comet mission have shown that water on earth most likely came from asteroids. The data challenges a long held theory that comets brought water to Earth.
The NASA space probe Dawn will reach Ceres this March, and is already transmitting new images of the planet's structure. Researchers hope these will provide new insights into our solar system's early days.
A bouncing space cube from Germany has left on a first-of-its-kind mission: to land on an asteroid and examine the surface at multiple spots on the cosmic rock.
The US space agency has confirmed that its space probe Dawn is in orbit around the dwarf planet Ceres. Scientists are hoping it will provide more information on how planets are created.