• Light travels from the sun to the earth in 8 minutes and 17 seconds.
• The sun will have used all its energy up in 5 billion years.
• In 1767, Horace de Saussure, a Swiss scientist, invented the world’s first solar energy collector, otherwise known as a ‘hot box’
• The British astronomer ,John HerschelIn, in the 1830′s used a solar energy collector box to cook food during an expedition to Africa.
• Albert Einstein won the Nobel Prize in 1921 for his experiments with solar energy and photovoltaics.
• There is enough sunlight reaching the earth every minute to meet the world’s energy demands for an entire year.
• If we covered a small fraction of the Sahara desert with photovoltaic cells, we could generate all the world’s electricity requirements.
• All TV and communications satellites are powered by solar energy using photovoltaic cells.
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