Planets of the solar system kevin yuPresentation Transcript
Planets of the Solar System By: Kevin Yu Science 8C
All the planets in The Milky Way revolve around the sun. ( Circling around)
Most/all the planets and moon rotate on themselves. ( Spin on own axis)
All these planets have their own gravity, the bigger the mass is the more gravity a planet/moon has.
A mass will become a planet if it has a round enough shape, revolves around the sun, and has its own gravity.
There are 8 planets in our solar system, Mercury, Venus, Earth, and Mars are inner planets, and Jupiter, Saturn, Uranus, and Neptune are the outer planets, as well as 3 dwarf planets.
These inner and outer planets are seperated by the asteroid belt.
Inner planets are often filled with craters from the many asteroids crashing it.
While inner planets are made of solid rock, outer planets are mostly made out of gases.
Mercury’s atmosphere is not substantial because it’s too close to the sun, and it contains helium and sodium.
Mercury is the closest to the sun. It can reach up to 427 ° c when facing the sun, and below -183 °c when facing away from the sun.
Mercury has no atmosphere and is shaped by volcanos, tectonic plates, and asteroid and meteor impacts.
Venus is also known as “The Evening Star” from Earth because of the light its cloud reflects.
A year in venus is even longer than a day at venus because of its slow rotation. Venus has a retrogade rotation, meaning it rotates the opposite direction from Earth, resulting the sun to rise from west to east there.
You would think Mercury is the hottest planet since it’s closest to the sun, but Venus is. Its greenhouse effect traps the heat in the planet.
Our atmosphere contains 21% oxygen, 78% nitrogen, 0.9% argon, and 0.1% other elements. The atmosphere protects us from solar radiation and most meteors.
Earth lies on a 23.5 degree angle tilt, giving us seasonal variations. Earth also has a magnetic field produced from the molten metal inside Earth, and Earth’s fast rotation.
The Moon is the natural satellite of Earth and is often seen at night.
M ars looks generally red because of the iron rich soil laying there.
Mars is also believed to have life because of tiny bacteria found from there.
95% of Mars’s atmosphere is carbon dioxide.
Mars also has the largest volcano in our solar system which is “Olympus Mons”. It is 26KM tall.
Mars also has 2 natural satallites which are Phobos and Deimos.
Its flat poles and bulgy equator makes it rotate very fast.
Jupiter’s atmosphere contains hydrogen, helium, sulfur, and nitrogen.
There is a giant red spot on Jupiter believed by scientists to be a huge hurricane.
Jupiter has over 50 natural satellites and one of them, Io, has volcanic activity on it.
Saturn’s atmosphere consists of hydrogen and helium.
Saturn has a large rings of ice and dust believed to be formed by the break up of nearby satellites.
Saturn has long seasons because it takes about 29.5 years to complete on revolution.
Saturn has such a low density, it can even float on water.
Uranus, unlike other planet has a tilt of 98 ° and practically rotates horizontally.
Uranus’s atmosohere includes hydrogen, helium and methane.
Uranus has up to 27 known natural satellites.
Neptune has an atmosphere of ammonia, helium, and methane.
Neptune has 13 known natural satellites.
Neptune’s largest natural satellite is Triton, and is believed that it is not originally Neptune’s satellite until Neptune’s gravitational pull grabbed Triton in its orbit.
A dwarf planet is a planet that fails the third requirement of being a planet: Having its own gravity.
There are lots of dwarf planets, three of the more known ones are: Pluto, Ceres, and Eris.
Pluto used to be an outer planet.
Pluto has 3 natural satellites, Charon, Nix, and Hydra.
Scientists using a spectroscope have found that Pluto’s atmosphere contains methane and nitrogen.
It is also been found that one of Pluto’s satellites, Charon, shares the same atmosphere with Pluto.
Ceres takes 4.6 years to finish one revolution around the sun.
Ceres was once thoght as an asteroid, because it is located in the asteroid belt.
Ceres’s surface is covered with things lyk ice, water, carbonates, and clay.
Eris was originally named Xena and has a natural satellite named Dysnomia.
It takes up to 577 years to complete one revolution!
Eris was originally not considered a planet until the category of “Dwarf Planets” came out.