The Sun

Location: Children's Educational Center in Oradea
Time: July 8-th, 2010

The Sun is the closest star to Earth and is the center of our solar system. A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions. The Sun is also an active star that displays sunspots, solar flares, erupting prominences, and coronal mass ejections. These phenomena impact our near-Earth space environment and determine our "space weather."
It is the largest object and contains approximately 98% of the total solar system mass. One hundred and nine Earths would be required to fit across the Sun's disk, and its interior could hold over 1.3 million Earths.

The light from the Sun heats our world and makes life possible.
1. The Sun's structure and composition
2. Biological effects of solar radiation
3. Wolf number-workshop.