Wednesday, January 29, 2014

The Sun


    I think the sun is a very cool & interesting thing. The sun is a star and it is by far the largest object in the solar system. The Greeks called it Helios and the Romans called it Sol. The sun is about 70% hydrogen, 28% helium by mass everything else amounts to 2%. This changes slowly over time as the Sun converts hydrogen to helium in its core. The outer layers of the sun exhibit differential rotation: at the equator the surface rotates once every 25.4 days; near the poles it's as much as 36 days. This happens because the sun is not a solid body like the Earth. The differential rotation extends considerably own into the interior of the Sun but the core of the Sun rotates as a solid body. The temperature of the Sun is 15.6 million Kelvin and the pressure is 250 billion atmospheres. At the center of the core, the Sun's density is more than 150 times that of water. http://nineplanets.org/sol.html 



Wednesday, January 15, 2014

Albert Einstein

   Albert Einstein seems like a very interesting man and I want to learn more about him so that's why I am writing about him today. Albert Einstein was born in Ulm, Germany on March 14, 1879. He took violin and piano lessons when he was younger. The year of 1905 was his "Miracle Year" which was when he came up with the famous equation "e=mc2". In 1915, Einstein completed his General Theory of Relativity. He emigrated to the United States in the autumn of 1933 and chose to live in Princeton, New Jersey. The practical applications of Einsteins´s theories today include the development of the television, remote control devices, automatic door openers, lasers, and DVD-players. He was recognized as TIME magazine's "Person of the Century" in 1999. Einstein left the world with infinite knowledge and pioneering moral leadership. Here is the link to the website. http://einstein.biz/biography.php





Here is the link to Albert Einstein's quotes if you want to look at them:http://www.brainyquote.com/quotes/authors/a/albert_einstein.html


Monday, January 6, 2014

The Planet, Earth

   Earth is the planet we live on. It is the third planet in order from the sun and is about 150 million kilometers from the sun. Earth makes one complete orbit around the sun every 365.27 days. It rotates on its axis about the same speed as Mars and completes one rotation in about 23 hours and 56 minutes. 75% of Earth is covered by water. That's a lot of water! Earth also has a total of 1 satellite which is the moon. This is the link to the website: http://www.frontiernet.net/~kidpower/earth.html 


   Did you know that Earth is the only planet whose English does not derive from Greek/Roman mythology? Well it is! Earth is divided into several layers which have distinct chemical and seismic properties. The layers are crust, upper mantle, transition region, lower mantle, D'' Layer, outer core, and inner core. This is the link to the website: http://nineplanets.org/earth.html