Untitled Flashcard Set

The solar system consists of the Sun and all the celestial bodies that are bound to it by gravity. The main components of the solar system include:

1. The Sun

   • A star at the center of the solar system.

   • Provides light and heat necessary for life on Earth.

   • Composed mostly of hydrogen (about 74%) and helium (about 24%).

2. Planets

   • There are eight recognized planets in the solar system, divided into two categories:

     • Terrestrial Planets

     1. Mercury

     2. Venus

     3. Earth

     4. Mars

     • Gas Giants

     1. Jupiter

     2. Saturn

     3. Uranus

     4. Neptune

   • Planets orbit the Sun in elliptical paths and can be classified based on their surface characteristics and atmospheric composition.

3. Dwarf Planets

   • Smaller than the main planets and do not clear their orbital path.

   • Examples include Pluto, Eris, Haumea, and Makemake.

4. Moons

   • Natural satellites that orbit planets.

   • Earth has one moon, while other planets like Jupiter and Saturn have many.

5. Asteroids and Meteoroids

   • Small rocky bodies that mostly reside in the asteroid belt between Mars and Jupiter.

   • Meteoroids are smaller fragments that can enter the Earth's atmosphere and become meteors or meteorites if they reach the ground.

6. Comets

   • Icy bodies that release gas or dust and form a tail when close to the Sun.

   • Comets originate from the outer regions of the solar system, such as the Kuiper Belt and Oort Cloud.

7. The Kuiper Belt and Oort Cloud

   • Regions beyond Neptune filled with icy bodies and dwarf planets.

   • Oort Cloud is a theoretical cloud of icy objects believed to surround the solar system at a distance much farther than the Kuiper Belt.

8. Gravity and Orbits

   • The force of gravity keeps the planets, moons, asteroids, and comets in orbit around the Sun.

   • Each object in the solar system has a specific orbit which varies based on its distance from the Sun and its mass.