Download Comets

People think that ‘long-period comets’ (with periods of
200 years or more) come from a nearly spherical
collection of icy things called Oort clouds. Measuring from
the sun, Oort clouds lie about 1,000 times behind the
orbit of Pluto (dwarf planet). ‘Short-period comets’ those
orbit the sun in about 200 years. They come from a place
called the Kuiper belt.
Tides are caused by gravity. The gravity of the moon
pulls water to the moon but the water does not reach the
moon. The suns gravity also pulls waters toward it too.
The forces of these planets causes water on earth to pile
up and go to shore. Tides act differently according to the
time of year and how close the earth and moon are to
the sun.
Mostly the sun and Jupiter are made out of the same
thing: hydrogen. But Jupiter has a larger concentration
on large elements like helium, that is what makes them
different.
ORBIT
 Do you feel like you’re moving? You’re not but
the Earth is. Planets have 2 ways in wich they
are moving. 1)we do a 360 spin in a matter of
24 hours which gives us the length of a day. 2)
Another way is that we travel around the sun
once every 365.25 days. That is why we have
seasons and a leap year in February.
 Planets closer to the sun go around the sun
faster than farther planets. For example mercury
only takes 88 earth days to orbit the sun and
Neptune takes 165 earth years to orbit the sun.
the planets.
 All the planets spin around the sun in a
counterclockwise direction because the cloud the
solar system formed from moved in a
counterclockwise spin.
SPIN
All the planets spin. The earth spins at a rate of 1038
miles per hour. When the planets formed, they spun in
the same direction, but today Venus spins in the opposite
direction probably because of a collision with another
solar body. The distance around earth’s orbit is
584,000,000 miles (940,000,000 kilometers). Earth
travels in its orbit at 66,700 miles an hour.