Sunday, November 21, 2010

The First Non-Milkyway Planet

Scientists from Germany's Max Planck Institute of Astronomy say that they have seen a planet orbiting the HIP 13044 star,belonging to a group of stars called the Helmi stream which is approximately 2000 light years away from the Earth .
This is the first finding of a planet in a galaxy other than our own Milky way and that results in the credit and they found it to be about 20% larger than our Jupiter .
They have again announced that the planet is now in the milkyway whereas its native is some other galaxy.
A bit confusing but still let us wait for the further details which may either make it a record or may prove it to be a stuff.......... :)


Friday, November 19, 2010

Anti matter trapped at CERN

The universe is made up of matter ,right? But just think of this line "when there is matter , what happened to the anti matter ? "
This line made the physicists to start work on the ANTI MATTER since 1995.

Matter in this universe is produced during the Big bang  , then there is every possibility of even anti matter produced during the same big bang , right? So this idea led to the research over anti matter and Scientists chose the Hydrogen atom to find its anti matter i.e; antihydrogen ,consisting of an antiproton and a positron.

The ALPHA experiment at CERN succeeded in trapping some anti hydrogen atoms and the study of these atoms may produce us some interesting facts about the origin of the Universe. But unfortunately, antihydrogen atoms have a very short life expectancy but still ALPHA's latest paper reports that 38 anti hydrogen atoms have been trapped in the recent trap and this is quite enough to study the properties of  this anti matter .
This short life expectancy of the anti hydrogen is due to the fact that there is a chance of the  hydrogen atom getting mixed up with anti hydrogen ad annihilate it ; and again this can be avoided with the help of strong magnetic force , pulling away these matter and anti matter away from each other and thus the problem is solved.
"For reasons that no one yet understands, nature ruled out antimatter. It is thus very rewarding, and a bit overwhelming, to look at the ALPHA device and know that it contains stable, neutral atoms of antimatter," said Jeffrey Hangst of Aarhus University, Denmark, spokesman of the ALPHA collaboration.


Of course many more experiments were done in the previous years , just to produce these anti hydrogen atoms ; like the one in 1995 by the same CERN during the PS210 experiment and which resulted in producing nine and just nine anti hydrogen atoms.But unluckily, as they were extremely hot , they were not suited to the aimed study.
Then In 1999 CERN activated the Antiproton Decelerator (AD), a device capable of decelerating antiprotons from 3.5 GeV to 5.3 MeV  but that is even a too hot situation for these studies to be carried out.
Then again , in 2002, the ATHENA and ATRAP experiments were carried out for the same.
This enthusiasm for anti matter dates long back and In 1965, a group of researchers led by Antonino Zichichi reported production of nuclei of antideuterium at the Proton Synchrotron at CERN.Almost during the same time, observations of antideuterium nuclei were reported by a group of American physicists at the Alternating Gradient Synchrotron .....
Recent data released by CERN states that, when fully operational, their facilities are capable of producing 107 antiprotons per minute. So the recent result produced by ALPHA will lead this journey , further .

Pinky bubble ..... finds NASA

Fermi gamma ray telescope finds out a huge pinkish feature in the center of our Milky way .
They announced that it has approximately 50,000 light years span length.
"What we see are two gamma-ray-emitting bubbles that extend 25,000 light-years north and south of the galactic center," said Doug Finkbeiner , Astronomer , who first observed this bubble.

The work of further research is taken up by  Simona Murgia, a Fermi research associate at the SLAC National Accelerator Laboratory in Menlo Park, CA.
Possibilities of the origin of the bubble include that it may be an out come of a huge star burst (star formation) or may be a a particle jet from the super massive black hole at the galactic center , as we have seen many such jets in the other near by galaxies.
And what I feel personally is this thing .....  If antimatter-dominated regions of space existed, the gamma rays produced in annihilation reactions along the boundary between matter and antimatter regions would be detectable. So according to this fact , the bubble may even consists of anti matter which led to the release of gamma rays .

Anyways this feature is even expected to carry with it , some mysteries of the Origin of the universe , which is the ultimate thought of every Astro lover :)

Thursday, November 18, 2010

Allan Sandage dies

Allan Sandage has died at the age 84. He worked with Edwin Hubble as an assistant at Mount Wilson Observatory.He is the root of scale of  determining the Hubble Constant, which describes the Universe’s expansion.

He graduated from  Illinois University in 1948 and then achieved a PhD  in 1953 under the tutelage of Walter Baade and parallel y  he was working as an assistant to Hubble at Mount Wilson. In 1950 he  had discovered that Hubble’s estimate of the distance to the Andromeda Galaxy, 700,000 light years, was half too small, based on the identification of Cepheid variables in Andromeda.

In 1958 he won the American Astronomical Society’s Warner Prize on his work on evolution of stars and then they allowed him to develop a method of calculating the ages of stars that have left the main sequence of the Hertzsprung–Russell diagram.
After that using the Hale telescope he had worked out the miscalculations  in Hubble's distance measurements.

Anyways Sandage Sir .... RIP in peace and thanks for your root work , and I repeat , root work :)