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Map of Solar System
Hunted Facts on solar system
  • Nearly all the solar system by volume appears to be an empty void.
  • The solar magnetic field is the dominating magnetic field throughout the interplanetary regions of the solar system, except in the immediate environment of planets which have their own magnetic fields.
  • The terrestrial planets are the four innermost planets in the solar system, Mercury, Venus, Earth and Mars.
  • Solar System, the Sun and everything that orbits the Sun, including the nine planets and their satellites; the asteroids and comets; and interplanetary dust and gas.
  • The dimensions of the solar system are specified in terms of the mean distance from Earth to the Sun, called the astronomical unit (AU).
  • The solar system was the only planetary system known to exist around a star similar to the Sun until 1995, when astronomers discovered a planet about 0.6 times the mass of Jupiter orbiting the star 51 Pegasi.
  • In broad terms, the charted regions of the solar system consist of the Sun, four rocky bodies close to it called the terrestrial planets, an inner belt of rocky asteroids, four gas giant planets, three dwarf planets, and an outer belt of small, icy bodies known as the Kuiper belt.
  • The inner solar system was too warm for volatile molecules like water and methane to condense, and so the planetesimals which formed there were relatively small (comprising only 0.6% the mass of the disc) and composed largely of compounds with high melting points, such as silicates and metals.
  • The immediate galactic neighborhood of the solar system is known as the Local Fluff, an area of dense cloud in an otherwise sparse region known as the Local Bubble, an hourglass-shaped region roughly 300 light-years across.
  • After each page of information about the solar system there are some review questions about the pictures on that page.

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