The question is basically unanswerable because there are lots of things that could be considered "the smallest thing in the universe" depending on what metric you use. Also, for a lot of them, no one person "discovered" them, it was the result of a lot of people and eventually enough evidence accumulated that most people decided "Hey, what that guy said 20 years ago makes sense."
Well, atoms are the smallest objects in the universe. Everything is made up of atoms. That means that bacteria is made of atoms!
The smallest volcano in the universe is believed to be a volcanic cone on Mars called "Home Plate." It is only about 90 meters (300 feet) tall and is part of the Columbia Hills located within the Gusev Crater on Mars.
The universe is organized in a hierarchical structure from largest to smallest as follows: universe, observable universe, galaxy, solar system, planet, moon, and then down to subatomic particles like protons, neutrons, and electrons.
All of it - to - a single photon.
Atoms
The biggest single thing in the universe that has been discovered is VY Canis Majoris, an incredibly massive star.
Well, atoms are the smallest objects in the universe. Everything is made up of atoms. That means that bacteria is made of atoms!
The answer to the enduring question of the smallest thing in the universe has evolved along with humanity. People once thought grains of sand were the building blocks of what we see around us. Then the atom was discovered, and it was thought indivisible until it was split to reveal protons, neutrons, and electrons inside. These too, seemed like fundamental particles, before scientists discovered that protons and neutrons are made of three quarks each.
No. Scientists have discovered sub-atomic particles such as quarks.
the smallest thing in the universe. also its a vibrating string that creates energy. every thing is related though string theory.
The smallest volcano in the universe is believed to be a volcanic cone on Mars called "Home Plate." It is only about 90 meters (300 feet) tall and is part of the Columbia Hills located within the Gusev Crater on Mars.
There is no such thing. The Universe is much bigger than the Solar System - and there is only one Universe, at least only one that we know of.
an atom because it is the smallest thing alive in the universe and it would take about 100,100,000,000,000 atoms to be seen.
According to the String Theory. There is a 1D object called a 'string'. It is approximately 0.000000000001 yoctometers.
the smallest moon in the whole universe
Not every galaxy, star, and corner of the universe has been discovered, but we have discovered the universe as a whole. ------------------------- Most likely we never will since the universe is expanding at approximately 40 miles per second.
Nobody discovered the universe. We have always known that the universe exists. Discoveries of how the universe works and what it is have been made by many people.