Source: ESA Press Release
Herschel observed comet Hartley 2 represented in its orbit on the left side and
the inset on the right side shows the image obtained with Herschel’s PACS instrument.
The two lines are the water data from HIFI instrument.
Image Credits: ESA/AOES Medialab; Herschel/HssO Consortium.
ESA's Herschel infrared space observatory has found water in a comet with almost exactly the same composition as Earth's oceans. The discovery revives the idea that our planet's seas could once have been giant icebergs floating through space.(read more)