World Bulletin / News Desk
Astronomers using the Hubble Space Telescope have found seven galaxies that formed relatively shortly after the universe's birth some 13.7 billion years ago, scientists said on Wednesday, describing them "as baby pictures of the universe."
One of the objects may be the oldest galaxy yet found, dating back to a time when the universe was just 380 million years old, a fraction of its current age.
"These early galaxies represent the building blocks of present-day galaxies," John Grunsfeld, NASA's associate administrator for science, told reporters in a conference call.
The discovery of galaxies dating back to the universe's early years should help scientists figure out what happened after the "dark ages," a period of time about 200 million years after the Big Bang explosion when cooling clouds of hydrogen, clumped together by gravity, began to ignite, triggering the first generation of stars.
"It was a very important moment in cosmic history," said astronomer Richard Ellis, with the California Institute of Technology in Pasadena.
Scientists do not know exactly when this "cosmic dawn" occurred and whether it was a single, dramatic event that caused all the galaxies to form their first stars, or whether it happened more gradually over millions of years.
The discovery of seven galaxies spanning a period between 350 million and 600 million years after the Big Bang supports theories that the cosmic dawn was a drawn-out affair, with galaxies slowly building up their stars and chemical elements over time, said Brant Robertson of the University of Arizona in Tucson.
Astronomers plan follow-up studies after Hubble's successor, the James Webb Space Telescope, launches in 2018.
The research appears in the Astrophysical Journal Letters.
Samsung's share slipped to 46 percent after hovering around 60 percent for five months.
He cited Facebook, WhatsApp and Snapchat as examples of online communication channels which were difficult for intelligence agencies to access.
Obama's proposal includes measures to allow for the prosecution of the sale of botnets, computer networks linked to cybercrime, and would give courts the power to shut down those responsible for distributed denial of service attacks.
Hackers posted threats and contact information of US military personnel.
Researchers said the antibiotic, which has yet to be trialled in humans, could one day be used to treat drug-resistant infections caused by the superbug MSRA, as well as tuberculosis
For the first time, frogs have been seen giving birth to tadpoles.
A hacker activist group known as Lizard Squad said it was responsible for the PSN outage as well as delays on Microsoft's Corp's Xbox network; Microsoft quickly fixed the problem.
Chancellor Angela Merkel's government wants to bring 1 million battery-powered vehicles onto the roads of Europe's largest economy by the end of the decade.
North Korea experienced Internet problems last weekend and a complete outage of nearly nine hours before links were largely restored on Tuesday.
#ICantBreathe and #IAmMikeBrown are the two top trending social media hashtags of the year.
The vehicle is the first one that marries the automobile functionality and software engineering into one working car. It will be tested in 2015.
Spanish news publishers want government to negotiate with Google.
The Russian space station Mir, launched by the Soviet Union in 1986, operated until 2001 and President Vladimir Putin is now seeking to reform Russia's once-pioneering space industry
Google's action caps a decade of acrimony with news publishers who blame the search giant for revenue and readership declines
Top climate envoy gives broad support for global deal but says country's "special circumstances" must be factored.
Finnish cyber-security expert tells Istanbul audience that people have made gigantic IT companies billions in profits by providing private data for services.