1. Aurora

2.  Aurora is a phenomenon appearing in the sky and usually happens in southern or northern regions and it happens at least once or more in one year at day or night in the southern or northern pole. In northern they call it Aurora borealis or Northern lights and in southern they call it Aurora australis or Southern lights. It usually happens one to two hours for the aurora to show until its gone.

3.  The Solar winds give small particles to space. Some of the particles are guided by the Earths magnetic fields to the north or southern poles. As the particles approach the Earth, The particles interact with the atmosphere making the particles to glow in different colors causing aurora to show on Earth.

4.  The good effects of aurora is some people enjoy watching it and it makes some people visit to north or southern pole and they admire it or take photos and there are many different colors of aurora like red, purple, blue, green and even black.

5.  The electron current that produces the aurora, also produces its own magnetic field. This magnetic field modifies the Earth's own field, so that on the ground near an aurora the Earth's magnetic field changes. It happens because the process of the aurora. This can upset radio communication or even produce black- outs in our electricity.

7.  http://www.auroravillage.com/aurora_facts.html http://www.auroravillage.com/aurora_facts.html  http://www.aurorahunter.com/aurora- borealis.php http://www.aurorahunter.com/aurora- borealis.php  http://www.google.co.id/imghp?hl=id&tab=wi http://www.google.co.id/imghp?hl=id&tab=wi  http://finland.fi/Nature_Environment/aurora/eff ects.html http://finland.fi/Nature_Environment/aurora/eff ects.html  http://odin.gi.alaska.edu/FAQ/ http://odin.gi.alaska.edu/FAQ/  http://www.astronomycafe.net/qadir/q1855.htm l http://www.astronomycafe.net/qadir/q1855.htm l