Searching for defects in space
Topological defects in space may have developed fractions of a second after the Big Bang. Simulations of these wormlike entities and a comparison of the simulations with cosmic background radiation measurements ...
Galactic archaeologists uncover new insights into the formation of the earliest stars and galaxies
A team of Galactic archaeologists has uncovered new insights into the formation of the earliest stars and galaxies by observing the chemical signatures of ancient 'fossil' stars present in the outer and inner halos encircling ...
Heavyweight galaxies puzzle astronomers
(PhysOrg.com) -- Astronomers have discovered large galaxies some two thirds of the way back in time to the big bang. This surprising find casts doubt on theories of how the biggest galaxies form.
Early galaxy went through 'teenage growth spurt,' scientists say (w/ Video)
(PhysOrg.com) -- Scientists have found a massive galaxy in the early Universe creating stars like our sun up to 100 times faster than the modern-day Milky Way.
Same rules apply to some experimental systems regardless of scale
(PhysOrg.com) -- New experiments show that common scientific rules can apply to significantly different phenomena operating on vastly different scales.
Tin-100 produced in key nuclear physics experiment
A few minutes after the Big Bang the universe contained no other elements than hydrogen and helium. Physicists of the Technische Universitaet Muenchen and the Helmholtz Center for Heavy Ion Research have now ...
Best of Last Week – Rethinking black holes, trusting of scientists by Americans and a new 3D cloaking device
Listening to the Big Bang—in high fidelity
A decade ago, spurred by a question for a fifth-grade science project, University of Washington physicist John Cramer devised an audio recreation of the Big Bang that started our universe nearly 14 billion ...
The earliest stars in the Universe
(PhysOrg.com) -- Matter in the universe after the big bang consisted almost entirely of hydrogen and helium atoms. Only later, after undergoing fusion reactions in the nuclear furnaces of stars, did these ...
Cluster collisions switch on radio halos
(PhysOrg.com) -- This is a composite image of the northern part of the galaxy cluster Abell 1758, located about 3.2 billion light years from Earth, showing the effects of a collision between two smaller galaxy ...
How old are the first planets?
To build a planet you need lots of rubble and that means lots of heavy elements – stuff more massive than atoms of hydrogen and helium. The elemental composition of the collapsing nebula that gave birth ...
Black holes from the dawn of the universe
The "Dark Ages" of the universe started about 400,000 years after the big bang, after matter cooled down enough for neutral atoms to form.
Exploring space burps
(PhysOrg.com) -- Forget the Big Bang theory on the origins of the universe. University of Alberta physicist Greg Sivakoff is looking to find the secrets of the Big Burp theory.
Astronomers detect vast amounts of gas and dust around black hole in early universe
(PhysOrg.com) -- Using the IRAM array of millimetre-wave telescopes in the French Alps, a team of European astronomers from Germany, the UK and France have discovered a large reservoir of gas and dust in a ...