Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




STELLAR CHEMISTRY
Say hello to Laniakea, our cosmic neighbourhood
by Staff Writers
Paris (AFP) Sept 03, 2014


Astronomers said Wednesday they have mapped the galaxy supercluster of which our Solar System forms a tiny part, and named the mighty mass Laniakea, or "immense heaven" in the language of Hawaii.

Laniakea comprises some 100,000 galaxies with about a hundred million billion suns, they reported in the journal Nature.

It would take 500 million years, travelling at the speed of light, to travel from one end of the supercluster to the other.

Galaxies are not distributed randomly throughout the Universe, tending instead to group together. They are connected by a "cosmic web" comprising filaments of matter, tugged by gravity.

Sometimes, thousands of galaxies can crowd together at the intersections of these filaments. But determining the boundaries of these so-called superclusters -- defining the regions of space they dominate -- has been a big debate.

A team led by Brent Tully at the Institute for Astronomy at the University of Hawaii at Manoa, used a new method to map the supercluster that includes our home.

The team delved into a vast database of galaxies, singling out 8,000 that lie in our cosmic neighbourhood, and studied their motion.

They calculated each galaxy's location by estimating its velocity relative to the expansion of the Universe -- the movement initiated by the "Big Bang" some 14 billion years ago.

The biggest challenge was to figure out a phenomenon called the Great Attractor, a flat-bottomed gravitational "valley" within the supercluster.

The Great Attractor has complicated the bid to define this particular supercluster for decades.

It muddles calculations about the motion of galaxies because many are drawn into its "valley" -- in the same way that water flows down a slope -- even as they experience the outward force exerted by the expansion of the Universe.

Learning about the gravitational machinery of the Great Attractor, the team realised that our supercluster is far bigger than thought. Previous estimates had put it at about 100 million light years across.

The Milky Way, the galaxy that includes our star system, lies on the outskirts of Laniakea, according to a Nature video of the new map (http://www.youtube.com/watch?v=qqAy3BF0M2M&feature=youtu.be).

The name Laniakea was proposed by Nawa'a Napoleon, a professor of the Hawaiian language at the university.

It honours Polynesian navigators who used knowledge of the stars to make extraordinary travels across the Pacific.

.


Related Links
Stellar Chemistry, The Universe And All Within It






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





STELLAR CHEMISTRY
ISS Spacewalkers Deploy Nanosatellite, Install and Retrieve Science
Washington DC (SPX) Aug 19, 2014
Two Expedition 40 spacewalkers, clad in Russian Orlan spacesuits, wrapped up a 5-hour, 11-minute excursion outside the International Space Station at 3:13 p.m. EDT Monday. Flight Engineers Alexander Skvortsov and Oleg Artemyev deployed a small science satellite, retrieved and installed experiment packages and inspected components on the exterior of the orbital laboratory. Shortly after the ... read more


STELLAR CHEMISTRY
China Aims for the Moon, Plans to Bring Back Lunar Soil

Electric Sparks May Alter Evolution of Lunar Soil

China to test recoverable moon orbiter

China to send orbiter to moon and back

STELLAR CHEMISTRY
Opportunity Flash-Memory Reformat Planned

Memory Reformat Planned for Opportunity Mars Rover

Scientist uncovers red planet's climate history in unique meteorite

A Salty, Martian Meteorite Offers Clues to Habitability

STELLAR CHEMISTRY
Aurora Season Has Started

Russian, US Scientists to Prepare Astronauts for Extreme Situations in Space

Russia's Space Geckos Die Due to Technical Glitch Two Days Before Landing

US to Stop Using Soyuz Spacecraft, Invest in Domestic Private Space Industry

STELLAR CHEMISTRY
Same-beam VLBI Tech monitors Chang'E-3 movement on moon

China Sends Remote-Sensing Satellite into Orbit

More Tasks for China's Moon Mission

China's Circumlunar Spacecraft Unmasked

STELLAR CHEMISTRY
Science and Departure Preps for Station Crew

3-D Printer Could Turn Space Station into 'Machine Shop'

Russia May Continue ISS Work Beyond 2020

NASA Awaits Boeing's Completion of Soyuz Replacement

STELLAR CHEMISTRY
Sea Launch Takes Proactive Steps to Address Manifest Gap

SpaceX rocket explodes during test flight

Russian Cosmonauts Carry Out Science-Oriented Spacewalk Outside ISS

Optus 10 delivered to French Guiana for Ariane 5 Sept launch

STELLAR CHEMISTRY
Orion Rocks! Pebble-Size Particles May Jump-Start Planet Formation

Rotation of Planets Influences Habitability

Planet-like object may have spent its youth as hot as a star

Young binary star system may form planets with weird and wild orbits

STELLAR CHEMISTRY
Experiments explain why some liquids are 'fragile' and others are 'strong'

The fluorescent fingerprint of plastics

Atoms to Product: Aiming to Make Nanoscale Benefits Life-sized

Argonne scientists pioneer strategy for creating new materials




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.