Today is Wright Brothers Day

Wright Flyer. Credit: Wikipedia

Almost all of us take for granted that we can get to virtually any destination in the world by flying in an airplane. We routinely board an aircraft, grumble at the slightest delay, and complain when we don’t get any peanuts during the flight. But really, we should be amazed in wonderment as each airplane takes off and lands.

It’s almost a miracle: we can sit in a somewhat comfortable chair, sleep, read a book or watch a movie, and three hours later, we’ve flown across the country. And it all began 105 years ago. On December 17, 1903 the Wright brothers, Orville and Wilbur, made the first successful controlled, powered and sustained flight of an aircraft.

Orville flew for 12 seconds, covering 120 feet (36.5m), at a speed of only 6.8 mph from level ground into a cold headwind gusting to 27 miles (43 km) an hour. The flight was recorded in the famous photograph, above. Then, to prove it wasn’t a fluke, they flew two more times: Wilbur flew approximately 175 feet (53 m), and then Orville took the controls again and flew 200 feet (60 m).

Their altitude was about 10 ft above the ground. Although not the first to build and fly experimental aircraft, the Wright brothers were the first to invent aircraft controls – a three-axis control – that made it possible for a pilot to control the aircraft and made fixed wing flight possible.

Every year since 1963 the US Congress proclaims Dec. 17 as Wright Brother’s Day, and the US President signs the proclamation (read below). Here is Orville Wright’s account of the final flight of the day:

“Wilbur started the fourth and last flight at just about 12 o’clock. The first few hundred feet were up and down, as before, but by the time three hundred feet had been covered, the machine was under much better control. The course for the next four or five hundred feet had but little undulation. However, when out about eight hundred feet the machine began pitching again, and, in one of its darts downward, struck the ground. The distance over the ground was measured to be 852 feet (260 m); the time of the flight was 59 seconds. The frame supporting the front rudder was badly broken, but the main part of the machine was not injured at all. We estimated that the machine could be put in condition for flight again in about a day or two.”

The proclamation of Wright Brothers Day :

“Our history is rich with pioneers and innovators who used their God-given talents to improve our Nation and the world. On Wright Brothers Day, we commemorate two brothers, Orville and Wilbur Wright, who took great risks and ushered in a new era of travel and discovery.

With intrepid spirits and a passion for innovation, Orville and Wilbur Wright became the first to experience the thrill of manned, powered flight. On December 17, 1903, Orville Wright flew for 12 seconds over the North Carolina sand dunes in the presence of only five people. In the span of one lifetime, our Nation has seen aviation progress from the first tentative takeoff at Kitty Hawk to an age of supersonic flight and space exploration.

On this Wright Brothers Day, we recognize all those who have taken great risks and contributed to our country’s legacy of exploration and discovery. This year, we also celebrate the centennial of the world’s first passenger flight. By remaining dedicated to extending the frontiers of knowledge, we can ensure that the United States will continue to lead the world in science, innovation, and technology, and build a better future for generations to come.

The Congress, by a joint resolution approved December 17, 1963, as amended (77 Stat. 402; 36 U.S.C. 143), has designated December 17 of each year as “Wright Brothers Day” and has authorized and requested the President to issue annually a proclamation inviting the people of the United States to observe that day with appropriate ceremonies and activities.

NOW, THEREFORE, I, GEORGE W. BUSH, President of the United States of America, do hereby proclaim December 17, 2008, as Wright Brothers Day.

IN WITNESS WHEREOF, I have hereunto set my hand this sixteenth day of December, in the year of our Lord two thousand eight, and of the Independence of the United States of America the two hundred and thirty-third.

GEORGE W. BUSH “

Happy Birthday Johannes Kepler!

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December 27 is a day to celebrate the life of astronomer Johannes Kepler, who was born on this date in 1571, and is best known for his three laws of planetary motion. But also, coming up in 2009, The International Year of Astronomy (IYA) will celebrate the work of Kepler as well. Not only did Galileo begin his observations with a telescope almost 400 years ago in 1609, but also in that year Kepler published his book New Astronomy or Astronomia Nova. This was the first published work that documented the scientific method.

Kepler’s primary reason for writing Astronomia Nova was to attempt to calculate the orbit of Mars. Previous astronomers used geometric models to explain the positions of the planets, but Kepler sought for and discovered physical causes for planetary motion. Kepler was the first astronomer to prove that the planets orbited the sun in elliptical paths and he did so with rigorous scientific arguments.

An offshoot of Astronomia Nova was the formulation of concepts that eventually became the first two of Kepler’s Laws:

First Law: The orbit of a planet about the Sun is an ellipse with the Sun’s center of mass at one focus.

Second Law: A line joining a planet and the Sun sweeps out equal areas in equal intervals of time.

And Kepler’s third Law: The squares of the periods of the planets are proportional to the cubes of their semi-major axes.

Kepler was also instrumental in the development of early telescopes. He invented the convex eyepiece, which allowed an expanded field of vision, and discovered a means of determining the magnifying power of lenses. He was the first to explain that the tides are caused by the Moon and the first to suggest that the Sun rotates about its axis. He also was the first to use stellar parallax caused by the Earth’s orbit to try to measure the distance to the stars.

While Kepler remains one of the greatest figures in astronomy, his endeavors were not just limited to this field. He was the first person to develop eyeglasses designed for nearsightedness and farsightedness, the first to investigate the formation of pictures with a pin hole camera, and the first to use planetary cycles to calculate the birth year of Christ. He also formed the basis of integral calculus.

Kepler’s many books provided strong support for Galileo’s discoveries, and Galileo wrote to him, “I thank you because you were the first one, and practically the only one, to have complete faith in my assertions.”

Original News Source: The Writer’s Almanac