Answer:
I'm a god, a planet, and measurer of heat. Who am I?
What gets bigger the more you take away from it?
What can you hold in your left hand but not in your right hand?
This is a dead giveaway
Take one royal word in the plural and make it singular by adding one letter
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?