RT @perthobs: #CoolSpaceFacts A grain of sand at the same temperature as the centre of the Sun would kill you from 150km away. https://t.co/ECww0DlJ8O
RT @perthobs: #CoolSpaceFacts A grain of sand at the same temperature as the centre of the Sun would kill you from 150km away. https://t.co/ECww0DlJ8O