installing google chrome

This so so surprizing... the chrome takes a lot of time and finally tells unknown error unable to install. Checked some forums and finally when downloading from alternative site (i.e.. standalone mode) i unchecked the make chrome the default browser. Downloaded and installed... Now that the chrome is the latest one i had installed the best delicious bookmark manager chromacious aswell...  Adios

firefrox:: Permanantly add certificate

Esp when u r behind proxy u get this issue... You get invalid security certificate when connecting over through https. We say permanently add the certificate but it works only till the system is restarted. Huh! i was smoked out from using firefox just for this bug. I tried .. tried.. tried .. but no luck .. finally today i got a plugin which promises to permanently (i.e.e.. for ever) white list the url. I tried white listing.. but yet to check if it works on restart of the system. THe plugin is: Perspectives Let me know if it works for u as well.

Now i m back to firefox again..
This fellow doesnt work.. as he says on the site.. swithcing back to chrome..

Removing Active desktop recovery screen in windows

1. Go to Run and type regedit
2. Now navigate to this path – HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Desktop\SafeMode\Components
3. You would find a key named DeskHtmlVersion
4. Right click the key and select Modify
5. Under the label Base, select the radio button Decimal
6. Change Value data to 0
7. Click OK

Sometimes the above itself may not be enough in such a case do the following as well

1. Open task manager (on task bar right click and select task manager)
2. open processes tab, search for explorer and right click and say end process
3. once u have done it for all explorers, u'll see no more task bar
4. now in task manager, clickon file menu > new task > and type explorer
5. thats it.

 

 

Black hole

Astronomers think the object shown in this Chandra X-ray Observatory image (in box) may be an elusive intermediate-mass black hole. Located about 32 million light-years from Earth in the Messier 74 galaxy (M74), this object emits periodic bursts of x-rays at a rate that suggests it is much larger than a stellar-mass black hole but significantly smaller than the supermassive black holes found at the centers of galaxies. Few such middling black holes have been discovered, and scientists aren't sure how they form.

Photograph courtesy NASA/CXC/U. of Michigan/J. Liu et al./ NOAO/AURA/NSF/T. Boroson

Black holes are the cold remnants of former stars, so dense that no matter—not even light—is able to escape their powerful gravitational pull.

While most stars end up as white dwarfs or neutron stars, black holes are the last evolutionary stage in the lifetimes of enormous stars that had been at least 10 or 15 times as massive as our own sun.

When giant stars reach the final stages of their lives they often detonate in cataclysms known as supernovae. Such an explosion scatters most of a star into the void of space but leaves behind a large "cold" remnant on which fusion no longer takes place.

In younger stars, nuclear fusion creates energy and a constant outward pressure that exists in balance with the inward pull of gravity caused by the star's own mass. But in the dead remnants of a massive supernova, no force opposes gravity—so the star begins to collapse in upon itself.

With no force to check gravity, a budding black hole shrinks to zero volume—at which point it is infinitely dense. Even the light from such a star is unable to escape its immense gravitational pull. The star's own light becomes trapped in orbit, and the dark star becomes known as a black hole.

Black holes pull matter and even energy into themselves—but no more so than other stars or cosmic objects of similar mass. That means that a black hole with the mass of our own sun would not "suck" objects into it any more than our own sun does with its own gravitational pull.

Planets, light, and other matter must pass close to a black hole in order to be pulled into its grasp. When they reach a point of no return they are said to have entered the event horizon—the point from which any escape is impossible because it requires moving faster than the speed of light.

Small But Powerful

Black holes are small in size. A million-solar-mass hole, like that believed to be at the center of some galaxies, would have a radius of just about two million miles (three million kilometers)—only about four times the size of the sun. A black hole with a mass equal to that of the sun would have a two-mile (three-kilometer) radius.

Because they are so small, distant, and dark, black holes cannot be directly observed. Yet scientists have confirmed their long-held suspicions that they exist. This is typically done by measuring mass in a region of the sky and looking for areas of large, dark mass.

Many black holes exist in binary star systems. These holes may continually pull mass from their neighboring star, growing the black hole and shrinking the other star, until the black hole is large and the companion star has completely vanished.

Extremely large black holes may exist at the center of some galaxies—including our own Milky Way. These massive features may have the mass of 10 to 100 billion suns. They are similar to smaller black holes but grow to enormous size because there is so much matter in the center of the galaxy for them to add. Black holes can accrue limitless amounts of matter; they simply become even denser as their mass increases.

Black holes capture the public's imagination and feature prominently in extremely theoretical concepts like wormholes. These "tunnels" could allow rapid travel through space and time—but there is no evidence that they exist.

 

Neutron star

Photograph courtesy NASA/Andrew Fruchter (STScI)

 

Neutron stars are ancient remnants of stars that have reached the end of their evolutionary journey through space and time.

These interesting objects are born from once-large stars that grew to four to eight times the size of our own sun before exploding in catastrophic supernovae. After such an explosion blows a star's outer layers into space, the core remains—but it no longer produces nuclear fusion. With no outward pressure from fusion to counterbalance gravity's inward pull, the star condenses and collapses in upon itself.

Despite their small diameters—about 12.5 miles (20 kilometers)—neutron stars boast nearly 1.5 times the mass of our sun, and are thus incredibly dense. Just a sugar cube of neutron star matter would weigh about one hundred million tons on Earth.

A neutron star's almost incomprehensible density causes protons and electrons to combine into neutrons—the process that gives such stars their name. The composition of their cores is unknown, but they may consist of a neutron superfluid or some unknown state of matter.

Neutron stars pack an extremely strong gravitational pull, much greater than Earth's. This gravitational strength is particularly impressive because of the stars' small size.

When they are formed, neutron stars rotate in space. As they compress and shrink, this spinning speeds up because of the conservation of angular momentum—the same principle that causes a spinning skater to speed up when she pulls in her arms.

Pulsing Lights

These stars gradually slow down over the eons, but those bodies that are still spinning rapidly may emit radiation that from Earth appears to blink on and off as the star spins, like the beam of light from a turning lighthouse. This "pulsing" appearance gives some neutron stars the name pulsars.

After spinning for several million years pulsars are drained of their energy and become normal neutron stars. Few of the known existing neutron stars are pulsars. Only about 1,000 pulsars are known to exist, though there may be hundreds of millions of old neutron stars in the galaxy.

The staggering pressures that exist at the core of neutron stars may be like those that existed at the time of the big bang, but these states cannot be simulated on Earth.

 

putty connection manager weird error

hi,

when working with putty connection mgr i get the below error:
4/5/2010 3:48:47 PM:RUNTIME ERROR : Unknown exception occured
4/5/2010 3:48:47 PM:  Error : Object reference not set to an instance of an object.
4/5/2010 3:48:47 PM:  StackTrace :
4/5/2010 3:48:47 PM:     at x650e12b2512cbeed.x7fbe3d3b15648174.x765e6a19136b68b9()

and i figured out a fix for it.

in the options select the hide when minimised option. and it starts working. i will also post the same to the autors :)