WHAT ARE NORTHERN LIGHTS?
The bright dancing lights of the aurora are actually collisions between electrically charged particles from the sun that enter the earth's atmosphere. Aurora borealis In the north Aurora australis In the south
What causes NORTHERN LIGHTS?
The Northern Lights are actually the result of collisions between gaseous particles in the Earth's atmosphere with charged particles released from the sun's atmosphere o electrons hit air molecules o electrons and ions 0:2 molecules are "excited" molecules give off light as they calm down magnetosphere
The most common auroral color a pale vellowish-green, is produced by oxygen molecules located about 60 miles above the earth
Rare, all-red auroras are produced by high-altitude oxygen, at heights of up to 200 miles
Charged Particles Since about 1880, the connection between the Northern Lights and sunspot activity has been suspected. Aurora Solar Wind Magnetic Field Aurora
Charged Particles Thanks to research conducted since the 1950's, we now know that electrons and protons from the sun are blown towards the earth on the solar wind Solar Wind Aurora Magnetic Field , Aurora
Frequent and explosive collisions happen between gas molecules.
Upper limit 500-1000 km Solar particies collides with the molecules in Earth's atmosphere. Space Station 400 km The lights of the Aurora generally extend from 80 kilometres to as high as 640 kilometres above the earth's surface. Most common upper limilt 250 km Lower limit 85-100 km Airliners 10 km Everest 8 km
Northern Lights can be seen in the northern or southern hemisphere, in an irregularly shaped oval, centred over each magnetic pole.
Best time to watch the NORTHERN LIGHTS?