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




STELLAR CHEMISTRY
Our galaxy is way smaller than previous estimates
by Staff Writers
Edinburgh, UK (SPX) Jul 31, 2014


Illustration only.

The Milky Way is smaller than astronomers previously thought, according to new research. For the first time, scientists have been able to precisely measure the mass of the galaxy that contains our solar system.

Researchers have found that the Milky Way is approximately half the weight of a neighbouring galaxy - known as Andromeda - which has a similar structure to our own. The Milky Way and Andromeda are the two largest in a region of galaxies which astronomers call the Local Group.

Scientists say that Andromeda's extra weight must be present in the form of dark matter, a little-understood invisible substance which makes up most of the outer regions of galaxies. They estimate that Andromeda contains twice as much dark matter as the Milky Way, causing it to be twice as heavy.

Researchers say their work should help them learn more about how the outer regions of galaxies are structured. Their findings also provide further evidence in support of a theory which suggests that the universe is expanding.

Although both galaxies appear to be of similar dimensions, until now scientists had been unable to prove which is larger.

Previous studies were only able to measure the mass enclosed within both galaxies' inner regions. In this new study, researchers were also able to work out the mass of invisible matter found in the outer regions of both galaxies, and reveal their total weights. They say 90 per cent of both galaxies' matter is invisible.

A team of scientists led by the University of Edinburgh used recently published data on the known distances between galaxies - as well as their velocities - to calculate the total masses of Andromeda and the Milky Way.

Dr Jorge Penarrubia, of the University of Edinburgh's School of Physics and Astronomy, who led the study, said: "We always suspected that Andromeda is more massive than the Milky Way, but weighting both galaxies simultaneously proved to be extremely challenging. Our study combined recent measurements of the relative motion between our galaxy and Andromeda with the largest catalogue of nearby galaxies ever compiled to make this possible."

.


Related Links
University of Edinburgh
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
Glow in Space is Evidence of A Hot Bubble in Our Galaxy
Coral Gables FL (SPX) Jul 30, 2014
When we look up to the heavens on a clear night, we see an immense dark sky with uncountable stars. With a small telescope we can also see galaxies, nebulae, and the disks of planets. If you look at the sky with an X-ray detector, you would see many of these same familiar objects; in addition, you would see the whole sky glowing brightly with X-rays. This glow is called the "diffuse X-ray backgr ... read more


STELLAR CHEMISTRY
Riddle of bulging Moon solved at last

China's biggest moon challenge: returning to earth

Lunar Pits Could Shelter Astronauts, Reveal Details of How 'Man in the Moon' Formed

Manned mission to Moon scheduled by Roscosmos for 2020-2031

STELLAR CHEMISTRY
NASA Long-Lived Mars Opportunity Rover Passes 25 Miles of Driving

NASA's Mars Spacecraft Maneuvers to Prepare for Close Comet Flyby

NASA Seeks Proposals for Commercial Mars Data Relay Satellites

Emirates paves way for Middle East space program with mission to Mars

STELLAR CHEMISTRY
Virgin Galactic Announces Todd Ericson As Space Pilot

NASA Explores Additional Undersea Missions With NEEMO Projects 18 and 19

NASA Awards Construction Contract at Kennedy Space Center

Sierra Nevada Completes Major Dream Chaser NASA CCiCap Milestone

STELLAR CHEMISTRY
China to launch HD observation satellite this year

Lunar rock collisions behind Yutu damage

China's Fast Track To Circumlunar Mission

Chinese moon rover designer shooting for Mars

STELLAR CHEMISTRY
Science and Spacesuit Work While ATV-5 Preps for Launch

Russian Cargo Craft Launches for 6-Hour Trek to ISS

ISS Crew Opens Cargo Ship Hatch, Preps for CubeSat Deployment

Russian cargo craft docks with ISS, science satellite fails

STELLAR CHEMISTRY
China to launch satellite for Venezuela

SpaceX Soft Lands Falcon 9 Rocket First Stage

SpaceX releases video of rocket splashing into the ocean

SpaceX Falcon 9 v1.1 Flights Deemed Successful

STELLAR CHEMISTRY
Hubble Finds Three Surprisingly Dry Exoplanets

Astronomers come up dry in search for water on exoplanets

Hubble Finds Three Surprisingly Dry Exoplanets

The Most Precise Measurement of an Alien World's Size

STELLAR CHEMISTRY
Building 'invisible' materials with light

Laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster

Carbyne morphs when stretched

Chemist develops X-ray vision for quality assurance




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.