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A supernova is an explosion of a massive supergiant star. It may shine with the brightness of 10 billion suns! The total energy output may be 10^44 joules, as much as the total output of the sun ...
The average distance between the Earth and the Sun is a natural distance unit and is called an Astronomical Unit (AU).
A nearby star's apparent movement against the background of more distant stars as the Earth revolves around the Sun is referred to as parallax.
Feature article explain all the different activities of the sun from the solar wind to coronal mass ejections
A good site about the sun for younger audiences and teachers
Interesting facts about the Sun from the Science, Technology and Facilities Council (STFC)
A detailed website about the Sun and the Earth for International Heliophysical Year in 2007
See what the sun is up to right now
Read how NASA is watching the space weather from the sun as the solar maximum approaches.
A wonderful description of what happened to telegraph stations during extreme space weather Carrington Event in 1859.
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