600,000,000 T

Science Illustrated - - ASK US -

of hy­dro­gen are con­verted into he­lium in the Sun's

in­te­rior ev­ery sec­ond. For­tu­nately, the star's hy­dro­gen re­serves are huge. The Sun weighs about 2 x 1027 t and will not run out of hy­dro­gen in its core for another 5 bil­lion years.

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