Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




EXO LIFE
Study: Lack of magnetic field could render many exoplanets lifeless
by Staff Writers
Antioquia, Colombia (UPI) Apr 17, 2013


disclaimer: image is for illustration purposes only

Some Earth-like exoplanets that are seemingly habitable may be missing magnetic shielding, exposing them to damaging radiation, researchers in Colombia say.

To support life as we know it, planets need thick, water-rich atmospheres and liquid surface water, Jorge Zuluaga at the University of Antioquia and colleagues said, but water can get blasted away by stellar winds unless the planet has a strong magnetic field.

In our own solar system Mars and Venus do not have magnetic fields, and it is thought stellar winds stripped away the bulk of Mars's atmosphere while Venus was left with one of mostly carbon dioxide, making it toxic, they said.

In most planets it is a churning molten core that generates a magnetic field, so the researchers calculated how long it would take a rocky, Earth-like planet to cool to the point that it's internal magnetic generator stopped working, NewScientist.com reported Wednesday.

They applied their calculations three well-known exoplanets considered to be potentially habitable: Gliese 581d, HD 40307g and GJ 667Cc.

The first two might have magnetic fields just barely strong enough to protect the planets from dangerous stellar radiation, they said, but the third is doomed.

The presence or absence of magnetic fields needs to be taken into account when considering whether a planet might be capable of supporting life, Zuluaga said.

.


Related Links
Life Beyond Earth
Lands Beyond Beyond - extra solar planets - news and science






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





EXO LIFE
Power behind primordial soup discovered
Leeds UK (SPX) Apr 05, 2013
Researchers at the University of Leeds may have solved a key puzzle about how objects from space could have kindled life on Earth. While it is generally accepted that some important ingredients for life came from meteorites bombarding the early Earth, scientists have not been able to explain how that inanimate rock transformed into the building blocks of life. This new study shows how a ch ... read more


EXO LIFE
Characterizing The Lunar Radiation Environment

Russia rekindles Moon exploration program, intends setting up first human outposts there

Pre-existing mineralogy may survive lunar impacts

Lunar cycle determines hunting behaviour of nocturnal gulls

EXO LIFE
Dutch reality show seeks one-way astronauts for Mars

Accurate pointing by Curiosity

NASA Mars Orbiter Images May Show 1971 Soviet Lander

Opportunity is in position for solar conjunction at 'Cape York' on the rim of Endeavour Crater

EXO LIFE
Mysterious water on Jupiter came from comet smash

What makes a good astronaut?

NASA urged to preserve funding for planetary science missions

Testing Spacesuits in Antarctica, part 1

EXO LIFE
Yuanwang III, VI depart for space-tracking missions

Shenzhou's Shadow Crew

Shenzhou 10 sent to launch site

China's Next Women Astronauts

EXO LIFE
Spacewalkers Deploy Plasma Experiment, Install Navigational Aid

The New and Improved ISS Facilities Brochure

Full tank, please For ATV Einstein

Russia puts mice, newts in space for a month

EXO LIFE
NASA Seeks Innovative Suborbital Flight Technology Proposals

Stephane Israel named Chairman and CEO of Arianespace

Launch pad problem scrubs launch of Antares rocket for NASA

ILS Proton Launches Anik G1 for Telesat

EXO LIFE
Kepler Discovers its Smallest Habitable Zone Planets

Notre Dame astrophysicist discovers 5-planet system like Earth

Five-Planet System With Most Earth-Like Exoplanet Yet Found

New Techniques Allow Discovery Of Smallest Super-Earth Exoplanets

EXO LIFE
US eases export rules on aerospace parts

MEADS Low Frequency Sensor Cues Multifunction Fire Control Radar in Test

Ontario Air Cadets Take Flight in Lockheed Martin's Prepar3D Simulation Software

Softening steel problem expands computer model applications




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement