Searching for life in Europa’s ocean – with a tiny submarine

Artist's conception of DADU exploring ice-covered waters. Credit: Jonas Jonsson / Angstrom Space Technology Centre of Uppsala University
Artist’s conception of DADU exploring ice-covered waters.
Credit: Jonas Jonsson / Angstrom Space Technology Centre of Uppsala University

For decades, Jupiter’s moon Europa has been the focus of fascination and debate. Why? Because it has a global ocean – a deep, salty ocean similar to those on Earth, except that in Europa’s case it is always covered by a crust of ice. Speculation has grown that there could be life of some kind in that alien watery darkness, and now there is a new proposal for how to look for it – a tiny submarine!

Read MoreSearching for life in Europa’s ocean – with a tiny submarine

The three best places in the solar system to look for life (other than Mars)

Europa
Europa. Credit: NASA / JPL-Caltech

Not all that long ago, it was considered very unlikely that life could exist anywhere else in the solar system, apart from maybe Mars. A variety of robotic spacecraft missions, however, have changed scientists’ views; there are indeed a handful of other worlds in our own cosmic backyard which it is now known could potentially be habitable after all.

Read MoreThe three best places in the solar system to look for life (other than Mars)

Does Europa have ‘icy spikes’ on its surface?

Penitentes on the Andes mountains on Earth. Is there something similar on Europa as well? Credit: Wikimedia Commons
Penitentes on the Andes mountains on Earth. Is there something similar on Europa as well?
Credit: Wikimedia Commons

Europa is a fascinating little world, a moon with an icy crust and a subsurface global ocean. The environment is similar to the ice-covered waters at the Earth’s poles. Now scientists think that there may be another feature which is also found on Earth – huge frozen spikes of ice on the surface.

Read MoreDoes Europa have ‘icy spikes’ on its surface?