There are trillions of stars like sun in our universe but even though "why space is dark and cool?"well I really meant that our stars, giant balls of gases which exist by expelling huge amount of energy in the form of heat and light.So my question no.1 is ,why space is cool even though there are stars like sun in our space that expels huge amount of heat energy and my question no.2 is why space is dark even though there are stars like sun in our space giving huge of bright light? where does these energy goes?