Rosetta Observations Spark Debate on Origin of Earth’s Water

Comet 67P/Churyumov-Gerasimenko on 20 Novembe 2014. This mosaic comprises four individual NAVCAM images taken from 30.8 km from the centre of Comet 67P/Churyumov-Gerasimenko on 20 November 2014. Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Comets? Asteroids? Or What?

One of the most basic questions driving Astronomy and Space Exploration is; Where did the water [...]