Scientists researching the Lovejoy Comet using a 30-metre long telescope at the Institut de Radioastronomie
Millimetrique in Sierra Nevada, Spain in January 2015, identified sugar molecules and ethyl alcohol on the comet.
The complex organic molecules or building blocks of like were identified on a comet for the first time, according to a study in the journal Science Advances.
The molecules are thought to be part of the rocky material that planets are made of.
The comets contain some of the oldest material in the solar system which is why scientists consider them as time capsules, offering a look at how life may have begun 4.6 billion years ago.