The Solar System

This Page Is Part of the Category: Solar System
Solar System - Josh Universe
The solar system is a collection of planets, moons, asteroids, comets, dust and gas that orbit our local star, the sun.
This Resource Is An Overview Page!
Overview Pages
Exoplanets | Planets Beyond The Solar SystemWhat is an exoplanet? An exoplanet is a planet that lies beyond our solar system. This Page Is Part of Category: Exoplanets Exoplanets - Josh UniverseExoplanets are worlds beyond the solar system.Josh Universe Is There Life on Exoplanets? We have currently…

Solar System Structure

The Sun

The Sun is the star at the center of the solar system, around which all the planets orbit. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field and produces sunspots, flares, and other solar activity. The Sun's energy is produced by nuclear fusion at its core, which converts hydrogen into helium and releases a tremendous amount of energy in the form of light and heat.

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Can We Survive Without the Sun?
Likely not, with current technologies, the world as we know it would incur a mass extinction of most humans due to lowering temperatures, water bodies freezing, and gravitational instability.


The closest planet to the Sun, small and rocky, with no atmosphere and extreme temperature changes.

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Can Humans Live on Mercury?
No, humans can not live on Mercury due to extreme temperature fluctuations, solar radiation, and a thin atmosphere.
Is There Life on Mercury?
No, life as we know it would not be able to survive on Mercury due to extreme temperature fluctuations, proximity to the Sun, and being void of an atmosphere.
Can we colonize Mercury instead of Mars?
Mercury’s extreme temperature fluctuations, solar radiation, and lack of an atmosphere would make it very difficult, if not impossible.


The second planet from the Sun, similar in size and composition to Earth, with a thick and toxic atmosphere that traps heat and makes it the hottest planet in the solar system.

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Is There Life on Venus?
Scientists may have eliminated the possibility of extraterrestrial life on Venus due to extreme temperatures, volcanic activity, and acidic rain.


Our home planet, the third planet from the Sun, with a diverse and habitable environment, including an atmosphere that supports life, liquid water, and a magnetic field that protects against solar winds.

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Why Is The Earth Tilted?
The Earth is tilted on its axis by 23.5 degrees due to a collision with a Mars-sized asteroid approximately 4.5 billion years ago.
The Earth Is Not Flat.
Thousands of years of experiments, research, and science has contributed to the fact that the Earth is an irregular sphere and is not flat.

The Moon

Earth's natural satellite, the fifth largest moon in the solar system, with a rocky surface and no atmosphere. It is the only celestial body besides Earth that humans have visited.

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The Moon Landing Was Real.
The moon landing was a real event on July 20, 1969 that was achieved through thousands of people’s hard work, dedication, and expertise.
Why Does The Moon Have Craters?
Moon craters are formed when meteorites and asteroids strike the surface of the Moon. Many of the craters on its surface are mostly impact features caused when meteorites or comets hit the Moon.
Does The Moon Contain Water?
NASA has confirmed that there is water on the Moon’s sunlit surface water.


The fourth planet from the Sun, known as the Red Planet for its dusty and iron-rich soil, with a thin atmosphere and evidence of past water on its surface.

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What Is The Atmosphere Like on Mars?
Mars atmosphere is 95% carbon dioxide, 3% nitrogen, 1.6% argon, with the rest being traces of oxygen, water vapor, and other gases.


The largest planet in the solar system, with a thick atmosphere made mostly of hydrogen and helium, and a complex system of colorful clouds, storms, and moons.

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Is There Life on Jupiter?
No, life as we know it cannot survive on Jupiter due to its distance from the Sun, unsuitable atmosphere, and frigid temperatures.
Why Does Jupiter Have A Red Spot?
Jupiter’s Great Red Spot is an anticyclonic storm in a persistent high-pressure region the size of Earth.
Why Does Jupiter Have So Many Moons?
Jupiter has many moons due to its strong gravitational pull, proximity to the asteroid belt, and large size.

Jupiter's Moons

Jupiter has over 80 known moons, with the four largest being called the Galilean moons (Io, Europa, Ganymede, and Callisto). These moons are larger than Pluto, and are believed to have subsurface oceans of liquid water.

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Is There Life on Io?
It is highly unlikely that life as we know it could survive on Io due to extreme atmospheric and surface activities.
Is There Life On Ganymede?
It is possible for certain types of life to exist on Ganymede due to subsurface oceans, but we do not have evidence of life at this time.
Is There Life On Europa?
There is currently no evidence of life on Europa but the existence of Europa’s sub-surface oceans and complex chemistry makes Europa a great candidate for life.
Is There Life On Callisto?
Callisto is on the list of possible places where life could exist in our solar system beyond Earth due to its subsurface oceans.
Can Europa sustain human life?
The chances for life there were always iffy, as a global ocean lay under a few miles of ice, which separated it from oxygen being produced on the surface.
Can Europa be Terraformed?
Based on what we know about Europa, humans could live there if they were willing to modify how they use resources on the planet.


The sixth planet from the Sun, famous for its spectacular rings made of ice and rock particles and a system of more than 80 moons.

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Is There Life On Saturn?
No, life as we know it cannot exist on Saturn due to extreme temperatures, pressures, and lack of a surface. Saturn’s moons have been found to be highly hospitable for life to exist.

Saturn's Moons

Saturn has over 80 known moons as well, with the largest being Titan, which is the second largest moon in the solar system and has a thick atmosphere with lakes and seas of liquid methane.

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Is There Life On Enceladus?
There is currently no evidence of life on Enceladus but its complex chemistry and subsurface oceans make Enceladus a great candidate for life.
Is There Life on Titan?
There is currently no evidence of life on Titan but its complex chemistry and unique environments make Titan a great candidate for life.


The seventh planet from the Sun, with a tilted axis that causes it to spin on its side, and a hazy and icy atmosphere.

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The eighth and farthest planet from the Sun, with a dynamic atmosphere and the strongest winds in the solar system, and a system of 14 known moons.

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Is There Life On Neptune?
No, there is no evidence supporting the possibility of life on Neptune due to extreme temperatures, atmospheric activities, and distance from the Sun.

Transneptunian Objects

Transneptunian objects are a class of small, icy bodies that orbit the Sun beyond the orbit of Neptune. They include dwarf planets like Pluto and Eris, as well as other objects in the Kuiper Belt and scattered disc.

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Is Planet 9 a Black Hole?
While there are theories that planet nine is a black hole backed by groups of astronomers, including Avi Loeb at Harvard University, we do not know whether these theories will turn out to be true.
Why Was Pluto Demoted to Dwarf Planet
Pluto was demoted to a dwarf planet because it has not cleared the neighborhood around its orbit.

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