article_snippet: Scientists recently said that water on the comet was different to that on Earth - suggesting water on our world came from an asteroid, not a comet.
article_snippet: The goal of this long term science phase is to ‘understand better the comet’s surface, the area where the lander has landed,' Mission manager Mr Martin added.
article_snippet: Scientists are desperate to study  the jets that are being emitted by the comet in more detail - one is seen in this Rosetta image - as it approaches the sun.
article_snippet: Some comets' orbital periods lasts thousands of years.
article_snippet: In addition, perhaps the most interesting time to study the comet will be as the comet approaches the sun, and ice on the sun surface begins to vapourise into gas.
highlights_snippet: However, Esa scientists in Germany want to find it before the comet leaves the sun in August .
  
highlights_snippet: Esa scientists in Germany wants to perform as much science as possible before then .