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WHAT IS A BLACK HOLE

In April, NASA created a big announcement that they captured first image of black hole.  BUT WHAT IS A BLACK HOLE It is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City. The result is a gravitational field so strong that nothing, not even light, can escape. Most famously, black holes were predicted by Einstein's theory of general relativity, which showed that when a massive star dies, it leaves behind a small, dense remnant core. If the core's mass is more than about three times the mass of the Sun, the equations showed, the force of gravity overwhelms all other forces and produces a black hole. HOW THEY ARE FORMED Most black holes form from the remnants of a large star that dies in a supernova explosion. (Smaller stars become dense neutron stars, which are not massive enough to trap light.) If the total mass of the star is large e...

What is Nebula. Images of some nebula by Hubble

A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. For this reason, some nebulae are called "star nurseries." How do stars form in a nebula? Nebulae are made of dust and gases—mostly hydrogen and helium. The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star. Some of the most amazing nebula pictured by Hubble in Milky Way Galaxy The Eagle Nebula’s Pillars of Creation (M 16, Messier 16) The dust and gas in the pi...

RADARS DETECTS WATER ON MARS SOUTH POLAR REGION

                         ESA’s (European Space Agency) Mars space craft points to a pond of liquid water buried under layers of ice and dust in the south polar region of Mars. Evidence for the Red Planet’s watery past is prevalent across its surface in the form of vast dried-out river valley networks and gigantic outflow channels clearly imaged by orbiting spacecraft. Orbiters, together with landers and rovers exploring the martian surface, also discovered minerals that can only form in the presence of liquid water.           (  Download Powerpoint ) The presence of liquid water at the base of the martian polar caps has long been suspected but not observed. Scientists surveyed the Planum Australe region  (the blach spot on image A) using the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument, a low-frequency radar on the Mars Express spacecraft...

Collision of galaxies, images taken by hubble

The interaction between galaxies is an on going process in universe. However the merging of big galaxies with each other on average once over the past 9 billion years. But Small galaxies were coalescing with large galaxies more frequently. In fact, our own Milky Way galaxy had several such mergers with small galaxies in its recent past. In the combination of galaxies there is no collision of stars with eath other, it is the dust and other material which collapse and billions of stars are born, mostly in groups and clusters of stars. Some of the images of colliding galaxies taken by hubble This is image of a pair of interacting galaxies called Arp 273. The distorted shape of the larger of the two galaxies shows signs of tidal interactions with the smaller of the two. It is thought that the smaller galaxy has actually passed through the larger one. This nearly 300 million light years away from earth. And a part of Constellation "Andromeda" Hubble has captured a...

Start your career with UN - (An opportunity to work with UN apply now upto 9 Aug)

Are you looking for a job, with high prestigious institution like UN (united nations). Then your search is now ended because UN now recruiting by Young Professionals Program. What is the UN Young Professionals Programme? The Young Professionals Programme (YPP) is a recruitment initiative for talented, highly qualified professionals to start a career as an international civil servant with the United Nations Secretariat. It consists of an entrance examination and professional development programmes once successful candidates start their career with the UN. Application period The application period is open from 11 June through 9 August 2018 (closes at 11:59 PM New York time). Please log in to inspira.un.org to view and apply to the Job Openings (JO). Who can apply? The YPP examination is held once a year and is open to nationals of countries participating in the annual recruitment exercise. The list of participating countries is published annually and varies from year...

The dream of riding to moon alongside Neil Armstrong is going to true

Have you ever dreamed of going to the Moon? Imagined you were riding alongside Neil Armstrong and Buzz Aldrin as they piloted the lunar lander. Look around to see Earth out one window and stars lighting up black space from another. Now Apollo 11 VR going to make your imagination real by enables users to relive the Apollo 11 mission and take some of the first steps on the Moon—though not the very first, because Neil Armstrong is a few feet ahead, kicking up lunar dust and proclaiming, “... one small step for a man, one giant leap for mankind.” This all is going to done by Virtual technology. The combination of a virtual reality environment and NASA data and media resources helped Immersive VR Education make its app a larger-than-life experience. It has received widespread critical and popular acclaim, including multiple awards, and has been purchased by more than 40,000 users. NASA has an amazing trove of data about the Apollo lunar missions available online. This includes...