Knowledge

  The Milky Way Galaxy Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy. A galaxy is a large group of stars, gas, and dust bound together by gravity. They come in a variety of shapes and sizes. The Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area. It is very difficult to count the number of stars in the Milky Way from our position inside the galaxy. Our best estimates tell us that the Milky Way is made up of approximately 100 billion stars. These stars form a large disk whose diameter is about 100,000 light years. Our Solar System is about 25,000 light years away from the center of our galaxy – we live in the suburbs of our galaxy. Just as the Earth goes around the Sun, the Sun goes around the center of the Milky Way. It takes 250 million years...

 Mahatma Gandhi (1869-1948)   Mahatma Gandhi was the primary leader of India’s independence movement and also the architect of a form of non-violent civil disobedience that would influence the world. He was assassinated by Hindu extremist Nathuram Godse. Family of Gandhiji Indian nationalist leader Gandhi (born Mohandas Karamchand Gandhi) was born on October 2, 1869, in Porbandar, Kathiawar, India, which was then part of the British Empire. Gandhi’s father, Karamchand Gandhi, served as a chief minister in Porbandar and other states in western India. His mother, Putlibai, was a deeply religious woman who fasted regularly. At the age of 13, Gandhi wed Kasturba Makanji, a merchant’s daughter, in an arranged marriage. She died in Gandhi’s arms in February 1944 at the age of 74. In 1885, Gandhi endured the passing of his father and shortly after that the death of his young baby. In 1888, Gandhi’s wife gave birth to the first of four surviving sons. A second son was born in India 18...

Teacher's:- Sarvepalli Radhakrishnan:-  Sarvepalli Radhakrishnan (1888—1975) Radhakrishnan_SAs an academic, philosopher, and statesman, Sarvepalli Radhakrishnan (1888-1975) was one of the most recognized and influential Indian thinkers in academic circles in the 20th century. Throughout his life and extensive writing career, Radhakrishnan sought to define, defend, and promulgate his religion, a religion he variously identified as Hinduism, Vedanta, and the religion of the Spirit. He sought to demonstrate that his Hinduism was both philosophically coherent and ethically viable. Radhakrishnan’s concern for experience and his extensive knowledge of the Western philosophical and literary traditions has earned him the reputation of being a bridge-builder between India and the West. He often appears to feel at home in the Indian as well as the Western philosophical contexts, and draws from both Western and Indian sources throughout his writing. Because of this, Radhakrishnan has been hel...

Earth's Atmospheic Layers Troposphere The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region. Stratosphere The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer. Mesosphere The mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. Meteors burn up in this layer Thermosphere The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high. Aurora and satellites occur in this layer. Ionosphere The ionosphere is an abundant layer of electrons and ionized atoms and molecules that stretches from about 48 kilometers (30 miles) above the surface to the edge of space at about 965 km (600 mi), overlapping into the mesosphere and thermosphere. This dynamic re...

Naca The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915, to undertake, promote, and institutionalize aeronautical research. On October 1, 1958, the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA). NACA was an initialism, i.e. it was pronounced as individual letters, rather than as a whole word (as was NASA during the early years after being established). Formed           March 3 , 1915 Dissolved.       October 1,1958 On January 29, 1920, President Wilson appointed pioneering flier and aviation engineer Orville Wright to NACA's board. By the early 1920s, it had adopted a new and more ambitious mission: to promote military and civilian aviation through applied research that looked beyond current needs. NACA researchers pursued this mission through the agency's impressive collection of in-house wind...

 Planet's:- Mercury Zipping around the sun in only 88 days, Mercury is the closest planet to the sun, and it's also the smallest, only a little bit larger than Earth's moon. Because its so close to the sun (about two-fifths the distance between Earth and the sun), Mercury experiences dramatic changes in its day and night temperatures: Day temperatures can reach a scorching 840 F (450 C), which is hot enough to melt lead. Meanwhile on the night side, temperatures drop to minus 290 F (minus 180 C).  Mercury has a very thin atmosphere of oxygen, sodium, hydrogen, helium and potassium and can't break-up incoming meteors, so its surface is pockmarked with craters, just like the moon. Over its four-year mission, NASA's MESSENGER spacecraft revealed incredible new discoveries that challenged astronomers' expectations. Among those findings was the discovery of water ice and frozen organic compounds at Mercury's north pole and that volcanism played a major role in s...