How Big is an Atom?
The size of an atom is almost impossible to measure because the Atom contains 20 different particles. Electrons, for instance, determine the size of an Atom.
How big is the Universe
How Big is a Particle?
Imagine you have a pebble and whack it with a lump hammer and it breaks to a smaller size, but if you smashed it with a hammer until it is the smallest possible non-breakable fragment of itself then that is a ‘PARTICLE’
How Big is the Brightest Star
Sirius is the brightest star in our Northern Hemisphere winter night sky.
How big is the Universe
As a keen astronomer, I am still amazed at how vast and apparently endless the Universe appears to be. NASA and other space programs like including China and Russia spend huge budgets to be the first to find whatever it is they want to find. Do we know how big the Universe is? Science …