Latest topics
» Opinions on this Inception (movie) scene?
by Sary Mon 19 Mar - 9:42

» German Myths & Legends
by Neon Knight Sun 18 Mar - 19:38

» Rate the above song /10 (2nd & 3rd opinions allowed)
by Neon Knight Sat 17 Mar - 22:33

» Australia considers visas for white South African farmers
by Neon Knight Sat 17 Mar - 3:19

» Google propaganda ?
by Neon Knight Wed 14 Mar - 20:34

» The Roman stone eagle found in London
by Sary Mon 12 Mar - 22:19

» Are Scots still against independence?
by Neon Knight Sat 10 Mar - 12:03

» Flemish patriotic group disrupts 'open borders' demonstration
by Neon Knight Sat 10 Mar - 10:04

» What if the earth was not tilted on its axis?
by Neon Knight Sat 10 Mar - 9:07

» Old Film Trailers
by Neon Knight Fri 9 Mar - 22:18

» Escape from Auschwitz
by Sary Thu 8 Mar - 22:27

» Unsettling 1970s British Public Safety Films
by Neon Knight Thu 8 Mar - 21:52

» A European language?
by Aëlwenn Tue 6 Mar - 8:41

» If Jesus returned, what would you ask him?
by Neon Knight Sun 4 Mar - 18:20

» Red Ice Radio peddles junk science
by de Burgh Sat 3 Mar - 18:56

» Cheddar Man lightened - where could he pass?
by V95.43XD Fri 2 Mar - 21:23

» Celtic Territories in Europe
by de Burgh Fri 2 Mar - 0:21

» New & Recent Film Trailers
by Neon Knight Thu 1 Mar - 19:55

» Now listening to . . .
by Sary Tue 27 Feb - 23:42

» Following the Progress of Germany's AfD Party
by Neon Knight Wed 21 Feb - 21:57

» Ronnie James Dio Appreciation Thread
by Neon Knight Wed 21 Feb - 21:53

» Islamic dress code relaxed for women in Tehran
by Neon Knight Wed 21 Feb - 21:41

» Art Style Preferences Test
by Neon Knight Sun 18 Feb - 19:43

» What do you want from a political representative?
by Neon Knight Sat 17 Feb - 21:37

» Being bullied by siblings increases risk of psychosis
by Neon Knight Fri 16 Feb - 0:40

» Neoliberal organisation recommends basic income policy
by Neon Knight Thu 15 Feb - 17:57

» M.E.T.A.L.
by Neon Knight Tue 13 Feb - 23:22

» A flag to represent European people?
by Neon Knight Sun 11 Feb - 13:48

» Is Sardinia in Europe or Africa?
by OsricPearl Sun 11 Feb - 4:44

» Beautiful Feminine Art
by OsricPearl Sun 11 Feb - 4:35

» British Family Names Finder
by Iseult Fri 9 Feb - 18:30

» Survey of Britons' Paranormal Beliefs (2017)
by Sary Fri 9 Feb - 11:31

» Bermuda becomes first country to repeal same-sex marriage
by Iseult Fri 9 Feb - 4:01

» Serbian politician fatally shot in Kosovo
by Guest Wed 7 Feb - 23:39

» King Michael: Romania bids farewell to former monarch
by Guest Wed 7 Feb - 23:06

» The Six European Microstates
by Neon Knight Wed 7 Feb - 19:13

» Tariq Ramadan charged in France over rape allegations
by OsricPearl Wed 7 Feb - 18:58

» Child slavery victim to plead to stay in UK with support of thousands
by Guest Wed 7 Feb - 18:13

» The Christians Who Rejected the Old Testament
by Neon Knight Fri 2 Feb - 19:29

» Strong Quotes
by Neon Knight Sat 27 Jan - 17:50

Life may be easier to find on planets outside the ‘habitable zone’

View previous topic View next topic Go down

Life may be easier to find on planets outside the ‘habitable zone’

Post Vendég on Mon 4 Dec - 20:15

Life may be easier to find on planets outside the ‘habitable zone’

A new study says that icy worlds with subsurface oceans might be our best bet.

When scientists are looking for worlds that might harbor life on other planets, they tend to look for worlds that have features similar to Earth's. It makes sense; after all, our dominant theories on how life evolved on the planet center on the presence of oxygen, organic molecules and liquid water. But now, two scientists are positing that we may be severely limiting ourselves by only looking for rocky planets with surface oceans. A study published last week at outlines the possibility that it's more likely that scientists will find life on icy worlds with subsurface oceans.

The issue here is the definition of the "habitable zone" of a star. Right now, scientists think that they are most likely to find life on other planets within the habitable zone of a star, and that definition is based on the Earth. Scientists are looking primarily at Earth-like planets (rocky, with surface liquid water) to find life. But Manasvi Lingam and Abraham Loeb posit that this is too narrow a search. In their study, they look closely at the concept of habitable zone and how it's not necessarily a predictor for habitability. For example, Mars and Venus are within the sun's habitable zone.

However, planets outside this area are capable of supporting liquid oceans underneath a crust of ice. We see this in our own solar system, thanks to worlds such as Europa, Titan and possibly even Pluto. Lingam and Loeb calculate the advantages and disadvantages life would have on these planets, as well as the likelihood life could even exist on them.

They conclude that these types of icy planets with liquid oceans could exist across a wide range of conditions, and that they are much more common (around 1,000 times) than rocky planets within a star's habitable zone. "As these worlds are likely to be far more abundant than the standard paradigm of rocky planets in the HZ of stars, we suggest that more effort should focus on modeling and understanding the prospects for life in subsurface oceans," the study says. After all, life may face more challenges on these worlds than on an Earth-like planet, but if it's just a numbers game, chances are that at least a few of them will support life.


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum