How big is the universe … compared with a grain of sand? - video
This star, known as SMSS J031300.36-670839.3, is in the Milky Way galaxy and some 6,000 light years from the Earth. It is the oldest known star in the Universe and the Australian astronomers who made the discovery believe this heavenly body was formed shortly after the Big Bang, some 13.6 billion years ago
How
big is the universe………?
‘ You'll never get your head
around how big the universe is,' warns astronomer Pete
Edwards of the University of Durham in
this film about measuring astronomical distances. 'There are as many stars in
the universe as there are grains of sand on the Earth.' So how far is a light
year? And supposing our galaxy were the size of a grain of sand, how big would
the universe be?
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