I Learned This Today

#761 What is a nebula?

What is a nebula? It is an enormous cloud of dust and gas in space. The word nebula is a Latin word, […]

How long did it take for the sun to get hot? Approximately 10 million years for it to start burning. The sun […]

Why are we running out of helium? It is a non-renewable resource that we are rapidly using up. Many people don’t give […]

I learned this today. A superfluid is a point where matter behaves like a fluid but has zero viscosity.A superfluid has no […]

I learned this today. Our voices change when we inhale helium because sound travels through it faster than it does through air. […]

I learned this today. Cold fusion is not possible because atoms repel each other and thermo energy on the scale of millions […]

I learned this today. Stars die because they exhaust all of their fuel. There are seven different types of star. They are […]