1 Physics of what if

What if there was no friction? / What if humans became huge? / What if humans became small? / What if there was no moon? / What if we approached a black hole? / Column 1 We might be able to travel through time using wormholes / What if superluminal speeds were realized? / What if the world was a four-dimensional space? / What if gravity became stronger?

2. The Miracle of Earth Realized Through the Hypothesis of "What If"

What if there was no water?/What if the sun was closer?/What if Earth was a gas giant?/What if Earth was small?/What if the sun had a large mass?/What if the orbit was unstable?/What if the oceans were small?/What if the day wasn't 24 hours long?/What if the tilt of Earth's axis was different?/What if the axis was unstable?/What if there was a lot of carbon dioxide?/What if there was no oxygen?/What if there was no ozone layer?/What if there was no atmosphere?/What if there was no magnetic field?/What if there were no volcanic eruptions?/What if there were no plate tectonics?/What if there were mega-eruptions?

3 What if universe

What if the initial conditions of the universe were different? / What if the universe did not expand rapidly? / What if there was a large initial heterogeneity of matter? / What if the density of matter was high? / What if the temperature of the early universe remained high? / What if stars did not form? / What if the strong nuclear force was weaker? / What if carbon could not be synthesized? / What if the masses of protons and neutrons were equal? ​​/ What if protons were heavier than neutrons? / What if supernova explosions did not occur? / What if even one condition on Earth were different? / What if Uranus was a gas giant?

4 The future of the universe considered under the assumption of 'what if'

What if a giant meteorite hits the Earth? / What is the 'fireball' that sometimes appears in the news in column 2? / What if the sun becomes a red giant? / What if a gamma-ray burst occurs? / What if vacuum collapse occurs? / What if a galaxy collides with another galaxy? / What if 100 trillion years pass in the universe? / What if 10100 years pass in the universe? / What if proton decay begins? /

5 What-If Worlds in Science Fiction Movies

Topics What-if worlds enjoyed through SF movies/Topics What-if worlds in time travel movies/What if there were planets with life?/What if there were ingredients for life on other planets?/What if life developed civilizations?/What if there were civilizations in the galaxy?/What if there were aliens?/What if we could receive signals from aliens?/What if aliens were more advanced than humans on Earth?/What if traces of aliens were discovered?/What if there were celestial bodies that emitted strong infrared rays?/

● Think about and experiment with the imaginary world from a physics perspective.

What would happen to humans if they were ten times larger, or conversely, shrunk to the size of an ant? What would happen if "friction" disappeared from our lives? This book hypothesizes an impossible "what if?" scenario, examining the possible phenomena and consequences from a physics perspective.


● Verification of various conditions that led to the Earth becoming the planet it is today.

For humans and animals living on Earth, the blue sky and sea are very familiar and natural scenes.
But when viewed from space, we can see that the planet Earth is very special.
Earth became a planet where life thrived through the miraculous coincidence of countless coincidences.
By observing the various miracles that have occurred on Earth, we examine what Earth would be like if conditions had changed even slightly.
The more you know, the more you understand that each of these is an important condition that cannot be left out.


● Verify the birth and formation of the universe with the hypothesis of what if

In space, exquisite physical laws exist that are perfectly suited to creating stars and life.
If the initial conditions at the birth of the universe had been even slightly different, the universe would not be what it is today.
Looking back on the history of the universe, we hypothesize 'what if?' about the events that occurred at each time and verify them one by one.
What would the universe be like if conditions were different?

● Predicting the future of the universe through assumptions and verification

What's happening in the universe right now, and what does the future hold? This course explores the future of the universe from a scientific perspective, examining hypothetical questions like, "What would happen to Earth if the Sun grew 300 times larger?", "What if the Milky Way and Andromeda collided?", and "If the universe had a lifespan, would it eventually disappear?"


Are science fiction stories true? The what-if worlds of science fiction movies.

SF (Science Fiction) depicts the world of science by assuming 'what ifs', and various novels and movies have been created up to now.
Among them, ‘space’ and ‘time travel’ are very popular topics.
The 'science of what if' is explained based on science fiction films, a genre of scientific fiction.
It also examines the existence of extraterrestrial intelligent life forms (astronauts) that occasionally appear in science fiction films from various angles.