Quantcast

Latest Nucleosynthesis Stories

Supernova Explosions Release Building Blocks Of Planet Formation
2014-07-10 10:13:49

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online The formation of planets of stars is still somewhat of a mystery to astronomers. While much progress has been made, particularly in the last few decades, there are still unanswered questions as to how the planetary building blocks form. But now, new research may be closing that knowledge gap. Early in the life of the Universe, the cosmos was dominated by the basic elements of hydrogen and helium, with only trace amounts of...

2014-03-18 12:22:39

Turbulent Mixing Inside Stars Causes them to Expand, Contract, Eject and Explode, According to 3-D Model Described in the Journal "AIP Advances" WASHINGTON, March 18, 2014 /PRNewswire-USNewswire/ -- A powerful, new three-dimensional model provides fresh insight into the turbulent death throes of supernovas, whose final explosions outshine entire galaxies and populate the universe with elements that make life on Earth possible....

New Insights Into Big Bang From Keck Observatory
2013-06-06 13:09:02

John P. Millis, PhD for redOrbit.com — Your Universe Online The big bang theory is the leading theory to explain the origin of the Universe. While challengers exist, no other well-developed theory has substantiated itself as a serious contender. But this does not mean that the big bang is without its problems. One issue that has plagued our origins story is the relative abundance of lithium isotopes Li-6 and Li-7 in the oldest observed stars. These atoms would have been...

First Biological Evidence Of Ancient Supernova
2013-05-09 09:20:27

John P. Millis, PhD for redOrbit.com — Your Universe Online In the early Universe the only elements capable of forming were hydrogen and helium. All subsequent atoms are created by massive stars: the lighter members by nuclear fusion in their cores, with much of the rest created during supernovae as atoms are collided at incredible energies leading to nucleosynthesis. Some of the elements produced have long half-lives, sticking around to lay the foundation for new stars, planets and...

Little Room Left For Error In Foundations Of Carbon-Based Life
2013-03-14 12:57:03

North Carolina State University Life as we know it is based upon the elements of carbon and oxygen. Now a team of physicists, including one from North Carolina State University, is looking at the conditions necessary to the formation of those two elements in the universe. They´ve found that when it comes to supporting life, the universe leaves very little margin for error. Both carbon and oxygen are produced when helium burns inside of giant red stars. Carbon-12, an essential...

Scientists Deduce Contents Of Cosmic Mystery Box
2013-01-01 10:16:02

April Flowers for redOrbit.com - Your Universe Online Science teachers in grade school sometimes hand out "mystery boxes," which contain ramps, barriers and a loose marble. Rotating the marble and feeling it hang up or drop, the students begin to deduce the contents of the box. Scientists who are trying to understand why tiny particles rain down from space face a similar dilemma, but on a much grander scale. Their mystery box is a hundred thousand light years across, and the only clues...

Astronomers Find Arsenic And Selenium In Milky Way's Halo
2012-04-30 09:27:50

The Big Bang produced lots of hydrogen and helium and a smidgen of lithium. All heavier elements found on the periodic table have been produced by stars over the last 13.7 billion years. Astronomers analyze starlight to determine the chemical makeup of stars, the origin of the elements, the ages of stars, and the evolution of galaxies and the universe. Now for the first time, astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic...

Scientists Make New Neutron Star Discovery
2012-03-02 12:33:30

Researchers from several universities have detected all phases of thermonuclear burning in a neutron star for the first time. The team discovered the "model burster" star located close to the center of the galaxy in the global cluster Terzan 5. The star is the first of its kind to burst the way that models predict, and it could help explain why a model star like it has gone undetected for so long. Astrophysicists have been studying neutron stars for decades to try and understand how...

ddbcf7fa1b1c301af3758766bc4ba48a
2011-02-03 12:21:19

Exploring an 'island of inversion,' physicists find new clues to element synthesis in supernovaeElements heavier than iron come into being only in powerful stellar explosions, supernovae. During nuclear reactions all kinds of short-lived atomic nuclei are formed, including more stable combinations "“ the so-called magic numbers "“ predicted by theory. Yet here, too, there are exceptions: the islands of inversion. Headed by physicists from the Excellence Cluster Universe at the...

ab4c5ab6042fa675b01c6a79f237529b1
2010-11-29 10:01:39

Just like archaeologists, who rely on radioactive carbon to date the organic remains from past epochs, astronomers have exploited the radioactive decay of an isotope of aluminum to estimate the age of stars in the nearby Scorpius-Centaurus association, the closest group of young and massive stars to the Sun. The new observations, performed in gamma rays by ESA's INTEGRAL observatory, provide evidence for recent ejections of matter from massive stars that took place only a few million years...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
Related