Let's go on the trip from the smallest to the largest !!!
The String (hypothetical)
The String theory says that everything in the possible universe is made up of point-like vibrating particles called
strings.
The Elementary Particles
Elementary particles are the sub-atomic or fundamental particles that are not formed by any further particles.
They are of 4 types: Quarks, Leptons, Scalar, and Vector Bosons. Among them, Quarks are the smallest. The
elementary particles form proton, neutron, and electron.
The Sub-atomic particles
Proton, neutron, and electrons are the sub-atomic particles. These particles form atoms. Proton and neutron form the nucleus whereas electron revolves around the nucleus in orbits. Electrons are the lightest among these three.
The Atoms
Atoms are chargeless and participate in the chemical reaction. They form molecules and elements.
The Radicals and The Ions
A radical is an atom or group of atoms that behave as a single unit in the chemical compound and contains at
least one unpaired electron.
Ion is an atom or group of atoms carrying charge as a result of giving or gaining electrons. It is of two types
cation (positively charged) and anion (negatively charged).
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The Molecules
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The molecules are the group of atoms connected by a chemical bond. It is the smallest unit of a substance. They form
elements.
The Elements
Element is a substance that can neither be broken down into pieces nor build-up from pieces. They are made up
of atoms. There are 118 elements known till now. Among them, 92 are natural, and the remaining are synthesized.
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The Compounds and The Mixtures
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Compound is the substance formed from molecules of elements united in a fixed proportion. There are more than
350,000 compounds till now. A mixture is the combination of different things in an undefined manner. Most of the
things that we see are made up of these terms.
Let's go directly into space !
A video that will give you a concept over the size of the multi-verse !
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The Meteoroids
Meteoroids are small pieces of stony or metallic matter that may enter in earth's atmosphere due to its
gravity. They are specially of two types: Meteors which are smaller that are destroyed in the atmosphere due to
friction and meteorite are the bigger ones that are not destroyed in the atmosphere and may form a crater in the
land. Hoba is the largest meteoroid.
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The Comets
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The Comets
Comets are the frozen chunk of gases, dust, and ice that resembles a star having a tail when it approaches the
sun. Its size varies but approximately,, comets are about 10 km. Bernardinelli-Bernstein is the largest comet
known.
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The Asteroids
Asteroids, aka minor or baby planets, lie in the asteroid belt between 1.7 AU and 4 AU in between the orbit of
Mars and Jupiter. Their size may vary from less than 1 km to a hundred km in diameter. Pallas is the largest
asteroid known.
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The Natural Satellites
Satellites are the objects that revolve around the planets due to the planet's gravity. In our solar system,
every planet except mercury and venus has satellites. Earth's satellite is the moon and the largest satellite in
our solar system is Jupiter's Ganymede.
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The Dwarf Planets
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Dwarf planets are objects that fail to become planets due to certain reasons. Pluto is the largest known
satellite.
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The Planets
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Planets are objects that revolve around stars. In our solar system, There are eight planets and we live
on earth. Jupiter is the largest and mercury is the smallest among them. But TrES-4b is the largest planet
known in the universe.
[ Fun fact: Jupiter is known as a failed star because although it has a huge size, it was able to start nuclear
fusion. ]
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The Stars
Stars are the giants of gases in which nuclear fusion happens that gives light and heat energy in the form of
radiation. The sun is a medium-sized star having a radius of about 435,00 miles. The largest known star is UY
Scuti. Black holes are formed when the center of a very massive star collapse in itself.
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The Nebulas
Nebula is the enormous cloud of gas and dust occupying the space between stars that form the new stars if
compressed. The Tarantula is the largest and most active star-forming region in our galactic neighborhood.
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The Solar Systems
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The solar system is the system of a star and objects revolving around it like planets, meteors, satellites,
and asteroids. The sun is the star of our solar system.
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The Constellations
Constellations are the group of stars that do not change their position respective to each other and form a
fixed pattern. There are 88 constellations known. Among them, Hydra is the largest.
The Black holes
Black holes are the possibly largest single object in the universe. These are formed when a massive star
collapses in itself decreasing its size but as the mass remains the same, it will have an immense gravity making it
so powerful that even light can't escape from it. It continuously takes everything inside and increases its mass
and size. The common black holes, stellar black holes are typically 10-mile in diameter but weigh around 20
times the mass of the sun. But the biggest black holes that are supermassive black holes that are present in the center of galaxies and have masses of more
than one million suns ! The largest black hole ever known is Quasar TON 618 having a mass of around fucking 66
billion suns !!!
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The Galaxies
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The galaxy is the gravitational bound of stars, gas, dust, solar systems, nebulas, constellations, dark matter,
etc. There are literally hundreds of billions of stars in galaxies. Our solar system is in the Milky Way galaxy
which has the size of 52,850 Light Years. Alcyoneus is the largest galaxy known which is 160 times wider than
our galaxy !
The Supercluster / Galactic group
Superclusters are a group of galaxies. Our milky way is part of the local group. Laniakea
Supercluster is the biggest supercluster ever known containing about 100,000 galaxies with a mass of about 100
million billion times of the sun having a diameter of 520 million light-years ! They are the largest Supercluster are
the largest gravitationally bound objects.
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The Universe
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The universe is everything. All the spacetime is in the universe. It has no boundaries. Although the observable
universe is about 93 billion light-years in diameter. But the real size of the universe is more than you could ever
think of ! It is also because the universe is expanding at the speed more than the speed of light.
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The Multiverse ! ( Hypothetical )
The multiverse is the hypothetical thing that is the group of the infinite universe !
THANK YOU !