Learning about the sun and stars

One Millions Earths can fit into the sun.

The sun's diameter is 1,392,700 miles, 109 times that of earth-and it's over150,000,000 km.

It's light, traveling at 300,000km. per second takes eight minutes to reach the earth.  

Without the sun's heat and light, there could be no life on our planet.

The surface temperature of the core reaches 27,000,000 degrees.

The middle layer or the radiation zone is the next layer away from the core. 

Then comes the outer layer or convection zone, which helps move heat, from the core, to the surface. 

The Visible Layer is called the photosphere.

The Chromosphere surrounds the Photosphere, can reach temperatures up to 50,000 degrees.

The cloud of gas surrounding the outermost layer is called the corona.

All the stars seen without a telescope belong to the Milky Way galaxy.

The closest star besides the sun is Proxima Centari. 4.3 light years away. A light year is the distance light travels in a year. (about 9.6 trillion km.)

The farthest stars are in galaxies billions of light years away.  

The Dog star other known as Sirius, is the brightest star in the sky. It is 8.8 light years away. Sirius is 30 times brighter than the sun.

Two stars revolving around a common center of gravity are called binary stars.

A nova star is a star that suddenly increases in brightness and laler