solar system

2. The solar consists of the sun and all
the structures that travel around it.(1)
The planets (2) planet-like objects called
asteroids (3) chunks of iron and stone
called meteorites, (4) comets

3. o Center of the solar
system.
o it’s diameter is
1,384, 000 km.
o PHOTOSPHERE-
visible surface of the
sun.

4. o Compose of 81.76%
hydrogen and 18.17%
helium. The other
elements total only 0.07%
o The temperature of the
sun near its surface is
estimated 10,000 ◦F.
o At it’s center the
temperature maybe as
high as 27,000,000 ◦F

6. o Dark solid bodies , much smaller than the sun and stars.
oMERCURY, VENUS, MARS, JUPITER, SATURN, AND URANUS are
planets that are bright enough to see from earth without
telescope.
o The motion of planet as it orbits the sun is called
REVOLUTION.
o Daily spinning of planet is called rotation.
o

7. o Mercury, Venus, Mars are called terrestrial planets
because they have similar densities and composition the
same as Earth.
o Jupiter, Saturn, Uranus, Neptune are called as giant
planets. They are mostly composed of Hydrogen, Helium,
and Methane.
o An asteroid belt separates the terrestrial planets from the
giant planets.
o Arrangement of planets can be memorized as:
My Very Eager Mother Just Served Us Nine Pizza

9. o There are three laws of planetary motion describing their
orbits that were published by German astronomer Kepler.
o First Law states that the planets move in elliptical. As a result
the planets are a little closer to the sun at some points in their
orbit. PERIHELION- point of the orbit nearest to the sun.
APHELION- point farthest from the sun
o Second Law is called law of areas. There is a imaginary line
between the sun and the planet where at point when the
planet is far from the sun it moves slower however if it is near
the sun it moves faster.

10. o Third law states that a planet orbital period depends on its
average distance from the sun. This explains that when the
planet is four times as far from the sun it will take eight times
to orbit the sun.
oPlanets rotates as it revolves around the sun. Jupiter takes 10
hours, Venus has 243 days, and earth is 24 hours or 1 day.