Friday, February 19, 2010

Scientists Come One Step Closer To 'WHY?'


Scientists Come One Step Closer To 'WHY?'

Please read the science article below.

When I see anything new about the happenings in the great beyond, my brain cells do a quantum leap into a state of awe. We humans know so little of life’s "WHAT'S IT ALL ABOUT ALFIE?” question. That's because our species spent umpteen years figuring out how to survive using only our brains. We weren’t equipped like other hunters in this kingdom called Earth; NO claws, NO sharp teeth, little hair or fur. NO keen eyesight to spot movement afar, hearing so-so, sense of smell fair, all we had was the ability to think which enabled us to develop tools. In just a small amount of time we’ve learned more than we knew for 1000’s upon 1000’s of years and modern knowledge is accelerating faster than the speed of light. Maybe in the future as we open more doors to knowledge, we as a living entity, will develop insights to help us, receptive beings end suffering, achieve nirvana (state of being free from suffering), and escape what is seen as a cycle of suffering and rebirth. YA THINK? thinkingblue.blogspot.com
~~~~~~~~~~~

Origin of key cosmic explosions unraveled


Thu Feb 18, 3:31 am ET

CHICAGO (AFP) – Astronomers who have long used supernovas as cosmic mile markers to help measure the expansion of the universe now have an answer to the nagging question of what sparks the massive stellar explosions.

"These are such critical objects in understanding the universe," lead author Marat Gilfanov of the Max Planck Institute for Astrophysics in Germany said Wednesday in describing his team's study.

"It was a major embarrassment that we did not know how they worked. Now we are beginning to understand what lights the fuse of these explosions."

Most scientists say Type 1a supernovae are formed when a white dwarf star -- the collapsed remnant of an old star --becomes unstable after it exceeds its weight limit.

Instability could come from the merging of two white dwarfs or accretion -- a process in which the gravity of the star draws in enough material from a sun-like companion.

Using NASA's Chandra X-ray Observatory, Gilfanov and his team studied the supernovas in five nearby elliptical galaxies and the central region of the Andromeda galaxy.

"Our results suggest the supernovae in the galaxies we studied almost all come from two white dwarfs merging," said co-author Akos Bogdan, also of Max Planck.

"If the supernova were produced by accretion, the galaxies would be roughly 50 times brighter in x-rays than actually observed."

Further study will be needed to determine if merging is also the primary cause of supernovae in spiral galaxies.

Pinpointing a possible supernova prior to the explosion is also extremely difficult, the researchers noted.

Pairs of white dwarfs are incredibly difficult to find. And once the white dwarfs spiral into distances when they are about to merge, it takes just a few tenths of a second for
them to explode.

Knowing how supernovas are formed is key to better understand how they can be used to measure cosmic distances and tracing dark matter, said Mario Livio, an astrophysicist with the Space Telescope Science Institute in Maryland.

"We use Type 1a supernova to determine the properties of dark energy in order to be able to do that accurately we need to fully understand the evolution of the power of the luminosity of these supernovae," Livio said in a conference call with reporters.

"There is (also) this process that we call feedback --namely all supernova play an important role in the evolution of their host galaxies."

The study is published in the February 18 edition of the journal Nature.
-----

Supernova explosion. ESA & Hubble space telescope. danielcanoott youtube channel

A black hole destroying a middle sized star.

Okay, because many people think this is real footage - it's not. It's computer animation,and it's obvious for several reasons. Just clearing things
up. SlipknotRevan youtube channel






Please sign this very important petition "demand question time" (of our political leaders) HERE... We really need more dialog from those at the top... The Republicans have got to be made to realize they can't hide behind "NO" any longer! thinkingblue

MOVE TO AMEND

Wearing a tinfoil hat because... CLICK HERE

Let's keep our heads, while we continue to watch THE

THEATER OF THE ABSURD!!!



"A SEARCH FOR TRUTH WILL FIND INJUSTICE."

thinkingblue

Links to this post:

Create a Link

<< Home