Subscribe free to our newsletters via your
. 24/7 Space News .

"Vulcan Planets" - Inside-Out Formation of Super-Earths
by Staff Writers
Evanston IL (SPX) Feb 04, 2015

File image.

NASA's Kepler telescope has discovered many strange, new worlds. None are stranger than the planetary systems that are commonly seen orbiting very close to their host star. These planets are typically Earth to "super-Earth"-size.

Some of these planets are almost 100 times closer to their star than the Earth is to the Sun, and many of these orbits are much smaller than those of Mercury. The relative inclination between the orbits in these systems is even lower than our solar system making these systems very flat. Understanding the origin of these close-in super-Earths is a major challenge for astronomers.

In a recent paper by Sourav Chatterjee and Jonathan C. Tan, appearing in the Astrophysical Journal Letters, a new model of planet formation is tested against the properties of the innermost of these planets, nicknamed "Vulcan planets" by the authors.

Vulcan was the name given to the once-sought innermost planet of our solar system that was thought might exist inside Mercury's orbit, but was never found. The new study finds extrasolar Vulcan planets have a property that the larger their distance from their parent star, the larger their mass.

This property is a prediction of a theory of "inside-out planet formation" proposed last year by Chatterjee and Tan in the Astrophysical Journal, which involves planets forming at their current locations from a ring of pebbles and small rocks delivered there after spiraling in from an extended gas and dust disk.

Such "in situ" formation of planets at very close distances to the star using material that may come from large regions of the planet-forming disk is a radical departure from most previous theories of the formation of these planets, which involved formation in the outer regions of disks followed by planetary migration to the current orbits.

Proving the existence of different modes of planet formation would be a key breakthrough for understanding the diversity of worlds that are now being discovered by planet hunters.

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once

credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly

paypal only


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

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

Share this article via these popular social media networks DiggDigg RedditReddit GoogleGoogle

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

Will NASA's TESS Spacecraft Revolutionize Exoplanet Hunting?
Washington DC (SPX) Jan 29, 2015
NASA's Transiting Exoplanet Survey Satellite (TESS), planned to be launched in August 2017 on a SpaceX Falcon 9 rocket from the Cape Canaveral Air Force Station, Florida, is designed to discover thousands of exoplanets. Led by the Massachusetts Institute of Technology (MIT), TESS will focus on stars 30-100 times brighter than those surveyed by the Kepler telescope, thus, the newly discovered pla ... read more

Service Module of Chinese Probe Enters Lunar Orbit

Service module of China's lunar orbiter enters 127-minute orbit

Chinese spacecraft to return to moon's orbit

Russian Company Proposes to Build Lunar Base

Gully patterns document Martian climate cycles

Meteorite may represent 'bulk background' of Mars' battered crust

The two faces of Mars

Several Drives This Week Put Opportunity Near Marathon Distance

NASA hails spending boost under Obama budget proposal

Mini Models Fire Up for SLS Base Heating Tests

Sundance doc examines real-life Close Encounter

How spaceflight ages the immune system prematurely

More Astronauts for China

China launches the FY-2 08 meteorological satellite successfully

China's Long March puts satellite in orbit on 200th launch

Countdown to China's new space programs begins

The Strange Way Fluids Slosh on the International Space Station

NASA's CATS Installed on ISS by Robotic Handoff

Roscosmos, NASA Still Planning on Sending Men Into Space

Russian Cargo Spacecraft to Supply ISS With Black Caviar

Moog Supports Delta 2 of SMAP satellite

Iran Launches Satellite Into Space, First Since 2012

British Satellite to Be Launched by Russian Proton-M Carrier Rocket

Soyuz Installed at Baikonur, Expected to Launch Wednesday

Habitable Evaporated Cores

Smaller Gas Giants Could Support Life

Will NASA's TESS Spacecraft Revolutionize Exoplanet Hunting?

Dawn ahead!

How ionic: Scaffolding is in charge of calcium carbonate crystals

Graphene edges can be tailor-made

The laser pulse that gets shorter all by itself

Eyeglasses that turn into sunglasses - at your command

The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news 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 All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.