News / Science & Technology

Ultra-Dense Dwarf Galaxy Discovered

The galaxy, known as M60-UCD1, is located near a massive elliptical galaxy NGC 4649, also called M60. This composite image of M60 and the region around it presents X-rays from Chandra (pink) and optical data from Hubble (red, green, and blue).
The galaxy, known as M60-UCD1, is located near a massive elliptical galaxy NGC 4649, also called M60. This composite image of M60 and the region around it presents X-rays from Chandra (pink) and optical data from Hubble (red, green, and blue).

Related Articles

Massive Volcano Erupts on Jupiter's Moon, Io

The eruption was bigger than any ever recorded on Earth

Lack of Methane Deals Blow to Martian Life Theory

The lack of methane gas does not completely rule out the possibility of life

Video ISON's Approach Captured by Amateur Astronomers

Comet can be seen by the naked eye throughout December
VOA News
An “ultra-compact dwarf galaxy” has been spotted by astronomers.

The galaxy, known as M60-UCD1, has its entire mass in a radius of only 80 light years, compared to the Milky Way’s radius of 50,000 light years. That means the density of stars is about 15,000 times greater than the Milky Way, and the stars are about 25 times closer.

"Traveling from one star to another would be a lot easier in M60-UCD1 than it is in our galaxy," said Jay Strader of Michigan State University in Lansing, first author of a new paper describing these results. "But it would still take hundreds of years using present technology."

Scientists hope M60-UCD1, which has the mass of 200 million suns, can provide clues on how galaxies evolved.

M60-UCD1 was seen by NASA’s Hubble Space Telescope and follow up observations were made with NASA’s Chandra X-ray Observatory and ground-based optical telescopes.

The galaxy is believed to have abundant amounts of heavy elements – elements heavier than hydrogen and helium – which makes it a “fertile environment for planets and, potentially, life to form,” said co-author Anil Seth of the University of Utah.

Another intriguing aspect of M60-UCD1 is that the Chandra data reveal the presence of a bright X-ray source in its center. One explanation for this source is a giant black hole weighing in at some 10 million times the mass of the Sun.

"We think nearly all of the stars have been pulled away from the exterior of what once was a much bigger galaxy," said co-author Duncan Forbes of Swinburne University in Australia. "This leaves behind just the very dense nucleus of the former galaxy, and an overly massive black hole."

If that happened, the galaxy would have been 50 to 200 times more massive than it is now.

Researchers believe the galaxy is more than 10 billion years old and that it has been “stalled” at this size for several billion years, and it is about 60 million light years from Earth.

A paper on M60-UCD1 has been published in the September 20th issue of The Astrophysical Journal Letters.

You May Like

Video Drug Use Rises in Afghanistan

Ninety percent of world’s heroin comes from Afghanistan More

Here's Your Chance to Live in a Deserted Shopping Mall

About one-third of the 1200 enclosed malls in the US are dead or dying. Here's what's being done with them. More

Video NASA: Big Antarctica Ice Shelf Is Disintegrating

US space agency’s new study indicates Larsen B shelf could break up in just a few years More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Poverty, Ignorance Force Underage Girls Into Marriagei
X
May 21, 2015 4:14 AM
The recent marriage of a 17-year old Chechen girl to a local police chief who was 30 years older and already had a wife caused an outcry in Russia and beyond. The bride was reportedly forced to marry and her parents were intimidated into giving their consent. The union spotlighted yet again the plight of many underage girls in developing countries. Zlatica Hoke reports poverty, ignorance and fear are behind the practice, especially in Asia and Africa.
Video

Video Poverty, Ignorance Force Underage Girls Into Marriage

The recent marriage of a 17-year old Chechen girl to a local police chief who was 30 years older and already had a wife caused an outcry in Russia and beyond. The bride was reportedly forced to marry and her parents were intimidated into giving their consent. The union spotlighted yet again the plight of many underage girls in developing countries. Zlatica Hoke reports poverty, ignorance and fear are behind the practice, especially in Asia and Africa.
Video

Video South Korea Marks Gwangju Uprising Anniversary

South Korea this week marked the 35th anniversary of a protest that turned deadly. The Gwangju Uprising is credited with starting the country’s democratic revolution after it was violently quelled by South Korea’s former military rulers. But as Jason Strother reports, some observers worry that democracy has recently been eroded.
Video

Video California’s Water System Not Created To Handle Current Drought

The drought in California is moving into its fourth year. While the state's governor is mandating a reduction in urban water use, most of the water used in California is for agriculture. But both city dwellers and farmers are feeling the impact of the drought. Some experts say the state’s water system was not created to handle long periods of drought. Elizabeth Lee reports from Ventura County, an agricultural region just northwest of Los Angeles.
Video

Video How to Clone a Mammoth: The Science of De-Extinction

An international team of scientists has sequenced the complete genome of the woolly mammoth. Led by the Swedish Museum of Natural History in Stockholm, the work opens the door to recreate the huge herbivore, which last roamed the Earth 4,000 years ago. VOA’s Rosanne Skirble considers the science of de-extinction and its place on the planet
Video

Video Blind Boy Defines His Life with Music

Cole Moran was born blind. He also has cognitive delays and other birth defects. He has to learn everything by ear. Nevertheless, the 12-year-old has had an insatiable love for music since he was born. VOA’s June Soh introduces us to the young phenomenal harmonica player.
Video

Video Women to March for Peace Between Koreas

Prominent female activists from around the world plan to march through the demilitarized zone dividing North and South Korea to call for peace between the two neighbors, divided for more than 60 years. The event, taking place May 24, marks the International Women's Day for Peace and Disarmament and has been approved by both Koreas. Zlatica Hoke has more.
Video

Video Drug Use Rises in Afghanistan Following Record High Poppy Crops

Afghanistan has seen record high poppy crops during the last few years - and the result has been an alarming rise in illegal drug use and addiction in the war-torn country. VOA's Ayesha Tanzeem has this report from Kabul.
Video

Video America’s Front Lawn Gets Overhaul

America’s front yard is getting a much-needed overhaul. Almost two kilometers of lawn stretch from the U.S. Capitol to the Washington Monument. But the expanse of grass known as the National Mall has taken a beating over the years. Now workers are in the middle of restoring the lush, green carpet that fronts some of Washington’s best-known sights. VOA’s Steve Baragona took a look.

VOA Blogs