Fellow

Booster rockets-such as the Sarurn V that launched the Apollo astronauts toward the Moon-are extremely wasteful. They can fly only once, parts are thrown away after use, and 97 percent of the mass is consumed in the first few minutes. Clearly, what was really needed for advanced and economic space exploitation was a spacecraft that could take off and return, to be reused time after time.    In 1972 NASA in the United States decided to build the Space Shunle. Rockets were to be used to assist the launch. Crew facilities were to be provided for up to eight people, and the huge cargo bay would be used to take satellites and sections of the International Space Station (iss) into orbit. New instruments would also be taken up to existing spacecraFt, and in-orbit J repairs would be carried out.

A n X-ray is a form of electromagnetic radiation with a very short wavelength, in the range 10 to o.o1 nanometers. German physicist Wilhelm Rontgen (1845-1923) was experimenting with cathode rays in 1895 when he realized that these produced another form of radiation when they hit the glass of the cathode ray tube. He called them X-rays, as 'X" stands for the unknown in mathematics.         R ontgen discovered that X ray passed through soft materials, such as paper, card, and fabric and produced fluorescence and can be used to form images on a barium-coated photographic plate.His next experiments involved human tissue. He asked his wife to put her hand on the photographic plate and discovered that the X-rays passed through the flesh,but not through her bones, or her ring. Rontgen was awarded the first Nobel Prize for Physics in 1901.         X -rays are a form of ionizing radiation, causing ions to be produced from the atoms that they hit,whi...

OUR EARTH O n every front-land, air, and water-              human activities have consequences,            many of them negative. Earth faces            environmental stresses, some urgent             and all needing attention. No part of the world remains untouched, no natural system untainted. Our forests regulate water flow, retain carbon, distribute nutrients, and produce soil-yet they are disappearing.         C utting, burning, and leveling operations reduce forests, mostly tropical, by an area equal to Florida each year. Habitat loss threatens species. Coastal areas experience degradation. By 2.060, erosion may claim a quarter of all homes in the U.S. within 500 feet of the shoreline. Our oceans are Polluted and overexploited.         M ore than 70 percent of marine fisheries are depleted. More th...

I Feel Sorry Guys!!!!!!                      😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔 😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔 😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔 😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔😔 This post is to say sorry to all my viewers. Actually I was not able to create posts for you guys just because my device was severely broken and it was not able to start.       ...

Here are the Top 10 Facts about the Space

Here are the top 10 Random Facts that I bet will make you say "MIND BLOWING"