A solar-powered airplane finished crossing the United States on Saturday, landing in New York City after flying over the Statue of Liberty during its historic bid to circle the globe, the project team said. The spindly, single-seat experimental aircraft, dubbed Solar Impulse 2, arrived at New York's John F. Kennedy International Airport at about 4 a.m. local time after it took off about five hours beforehand at Lehigh Valley International Airport in Pennsylvania, the team reported on the airplane's website. Such a pleasure to land in New York! For the 14th time we celebrate sustainability," said the project's co-founder Andre Borschberg on Twitter after flying over the city and the Statue of Liberty during the 14th leg of the trip around the globe. The Swiss team flying the aircraft in a campaign to build support for clean energy technologies hopes eventually to complete its circumnavigation in Abu Dhabi, where the journey began in March 2015. The solar cr...
When the sky is blue and clear it is because molecules in the air reflect blue light from the sun more than they are reflecting red light. The sun has all the colors of the rainbow in it; when reflected through a prism or these little molecules, you see different colors. All those colors you see in the sky are based on this principle. So just like when you shine a white light through different angles of a prism, the molecules reflect different colors when the sun is lower in the sky, such as sunset when you see the red and oranges. At sunset, the blue is then out of your line of sight. This can be a very deep subject. You have to understand prisms and even which kinds of molecules reflect the different colors. So many really technical things to consider. In about 1859 man named John Tyndall took steps in the name of science to explain the sky's color. He proved that light passes through clear fluid and acts like a prism by polarizing the light with specific qualit...