An overview of the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system.
The Nine Planets is an encyclopedic overview with facts and information about the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system and beyond.
Also in the Kuiper belt, Makemake is the second brightest object in the belt, behind Pluto. Makemake (and Eris) are the reason Pluto is no longer a planet.
Eris is the same size as Pluto, but three times further from the Sun! It's so far away, we don't know much about this extremely cold and remote dwarf planet.
The Sun is the heart of our solar system and its gravity is what keeps every planet and particle in orbit. This yellow dwarf star is just one of billions like it across the Milky Way galaxy.
The only place beyond Earth that humans have explored, the Moon is the largest and brightest object in our sky - responsible for the tides and keeping Earth stable on its axis.
Comets are snowballs made up of frozen gas, rock, and dust that orbit the Sun. As they get closer to the Sun, they heat up and leave a trail of glowing dust and gases.
Asteroids are small, rocky, debris left over from the formation of our solar system around 4.6 billion years ago. There are currently over 822,000 known asteroids.
Between the orbits of Mars and Jupiter, the asteroid belt contains an estimated 1.9 asteroids. The total mass of all objects in the asteroid belt is still less than that of Earth's Moon.
Excel High School has an online high school Earth Science course. Learn more about the course details here.
Northgate Academy offers Earth science and astronomy as homeschooling courses.
TraintheBrain provides online tutoring aimed at the deep discovery of astronomy, earth science, and more subjects related to our solar system.
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