There are three times as many stars in the universe as they had previously supposed – and “possibly trillions of Earths orbiting these stars” – say astronomers.
Archive for the ‘Cosmology’ Category
Cosmology is a fairly young science, one which attempts to reconstruct the history of our Universe from billions of years ago. Looking back so far in time is extremely difficult, and adding to the complexity is that many of the pillars upon which the theories of cosmology rest have only been conceived within the last 20 years or so.
Is there a bulk flow of matter coursing through our universe? A new study bolsters the idea – and paints a new view of the process of inflation, the exponential expansion that occurred moments after the big bang.
Globular clusters—giant balls of hundreds of thousands of tightly spaced, very long-lived stars—are the oldest stellar systems in the Milky Way. Yet after decades of looking for answers, astronomers still don’t know how they form.
Researchers are building a better picture of one of the most important changes in the early universe a process that lifted the cosmic fog from the dark, early universe.
The young universe spiked a fever 1.5 billion years or so after the Big Bang, warming up as huge black holes poured out massive amounts of energy, a new study suggests.
The Universe: No God required.
If this opinion came from the Pope, then we’d have a major scoop on our hands. Alas, it didn’t.
Stephen Hawking, British physicist (and, apparently, troublemaker) makes this statement in his new book, The Grand Design, that went on shelves on Thursday. Needless to say, it has taken the media by storm.
The most massive conglomeration of galaxies ever spotted in the early universe has been found, astronomers say.
This behemoth galaxy cluster contains about 800 trillion suns packed inside hundreds of galaxies. And it’s not even finished growing.
After nine years of scanning the sky, the Wilkinson Microwave Anisotropy Probe (WMAP) space mission has concluded its observations of the cosmic microwave background, the oldest light in the universe. The spacecraft has not only given scientists their best look at this remnant glow, but also established the scientific model that describes the history and structure of the universe.
As a respected high energy physicist, Dr. David Saltzberg’s work has brought him to many remarkable places: Antarctica, his classroom at UCLA, CERN’s Large Hadron Collider, and to the set of CBS’s The Big Bang Theory, for which he is the scientific consultant.
Ancient galaxies may be cosmic senior citizens today, but some have a wild streak in their past, one packed with frenetic star birth, astronomers say.
About 13.7 billion years ago, the big bang created a big mess of matter that eventually gave rise to life, the universe, and everything. Now a new material may help scientists understand why.
From the story of the Big Bang to the Nobel Prize to the ultimate fate of the universe—John C. Mather’s career as a Nasa (National Aeronautics and Space Administration) astronomer couldn’t have been more exciting.
Measuring the distances to objects in space is surprisingly hard. When you look up at night, can you really tell anything about the distances to various stars?
Physicists at the Fermi National Accelerator Laboratory are reporting that they have discovered a new clue that could help unravel one of the biggest mysteries of cosmology: why the universe is composed of matter and not its evil-twin opposite, antimatter.
A tony social club in midtown Manhattan is not the place one might expect to find a verbal sparring match between famous physicists. But that was the case April 23 at the Harmonie Club, when Alan Guth and David Gross had a feisty off-the-cuff debate about Guth’s model for the dawn of the universe.
Our universe might have originated from a black hole that lies within another universe.
How did the universe blossom from an infinitesimally small speck to astronomical proportions in its first trillionth second of existence? While scientists are still debating the answer to that question, a new probe should provide the first direct evidence that the metamorphosis did indeed happen as theories predict.
The radio galaxy Centaurus A, which is one of the brightest sources of radio waves in the sky, also radiates extremely high-energy gamma-rays, new observations from NASA’s Fermi Gamma-Ray Telescope have found.
Astronomers have combined a natural gravitational lens and a sophisticated telescope array to get the sharpest view ever of “star factories” in a galaxy over 10 billion light-years from Earth.