Section A Unit 2 a pencil sharpener a pen an eraser a ruler a pencil a pencil case.
Goal: To learn (review?) basic information about the 8 planets and the minor planets of our solar...
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Transcript of Goal: To learn (review?) basic information about the 8 planets and the minor planets of our solar...
THE PLANETS•Goal: To learn (review?) basic information about the 8 planets and the minor planets of our solar system.•Please be in your seat and have a pencil or pen.
NotebooksFYI – we will be beginning Geology
soon, so if you do not have a notebook anymore (for whatever reason), or your old one is filling up, you will want to get a new one by MONDAY, Feb 3.
I do not have many more to hand out, so if you need assistance acquiring a notebook, please talk me after class or your counselor.
Size & DistanceMost diagrams of our Solar System are not to
scaleAlso, most diagrams do not include the
“minor planets” or the Asteroid Belt.You’ve studied the Solar System in lower
grades, so this is just a review.We will create a chart for this information,
but first, look over the next few slides and keep these in mind while we’re working on this lesson.
Planets & Dwarf Planets click below FOR a 3:20 video
PlanetsThere are eight planetsThe “Inner Planets” – Mercury, Venus,
Earth, & Mars are also called “Terrestrial Planets” (Terra mean soil)
Dwarf (or Minor) PlanetsThere are three: Ceres, Pluto, and ErisCeres is the smallest and is located in the
Asteroid Belt between Mars and JupiterYou know about Pluto, formerly
considered the ninth planet, now known officially as asteroid #134340
Eris is an ice ball, officially knows as 2003 UB313. It was originally nicknamed Xena after a TV character.
These changes happened in 2006
Your chart: “Our Solar System”Keep your paper in
“Portrait”Use the ruler to draw a
line about every 1.5 inchesYou can sketch and color
picture of the planet It’s OK if you need to
continue on the back of the paper –
Headings +8 planets + 3 dwarf planets + 5 others = 16 rows (make 2 columns)
Planet/Bodies
Information
Mercury
•No atmosphere•88 day orbit•8000F to -3000F
MercuryMercury has virtually no atmosphere. It however has
small traces of an atmosphere .It takes less than 88 Earth days for Mercury to orbit
around the sun which is its year.Because of a lack of an atmosphere, the temperature
rises above 800°F while on the dark side it falls rapidly to -300°F.
Mercury rotates slowly on its axis. It completes one rotation every 59 Earth days which is its day.
The surface of Mercury is heavily cratered, looking much like our moon.
Mercury does not have a natural satellite (a moon)
VenusIts atmosphere is made up mostly of carbon
dioxide which causes a run away greenhouse effect and the planet is around 900 degrees F. It is the hottest planet.
It takes 243 days to make a rotation and it takes 224 days to orbit around the sun. This makes its day longer than its year
The planet rotates from East to West which is called retrograde rotation.
Venus does not have a natural satellite (a moon)
EarthIt is made up of approx. 70% waterOnly planet known to contain lifeThe densest planetDay = 24 hours Year = 365.25 days
MarsIt is red because there is a lot of iron in the
soilMars year = 687 Earth days.Nighttime temperatures on Mars can drop as
low as -191°F.The thin atmosphere is made of mostly
carbon dioxide.Mars has seasons like Earth.Mars has two moons.
Asteroid BeltThe Asteroid Belt is a region between the
inner planets and outer planets where thousands of asteroids are found orbiting around the Sun.
More than 7000 asteroids have been discovered. Several hundred more are discovered each year. There are undoubtedly hundreds of thousands more that are too small to be seen from the Earth.
Click above for NASA’s Dawn Mission to the Asteroid Belt 1:34 mins. Dawn (as of Dec 2013) is halfway from Vesta to Ceres.
CeresThis dwarf planet is one of the
largest asteroids in the Asteroid Belt
Scientists describe Ceres as an "embryonic planet." Gravitational perturbations from Jupiter billions of years ago prevented it from becoming a full-fledged planet.
Ceres ended up among the leftover debris of planetary formation in the main asteroid belt between Mars and Jupiter.
JupiterIt rotates faster than any planet making the days
only 10 hours long.It is the largest planet.Its has 67 confirmed moons!It has the biggest moon in the Solar System,
Ganymede.It has a ring.The Great Red Spot is a storm that has been
going on for over 300 years.The Great Red Spot is large enough to contain 2
to 3 planets the size of Earth
Jupiter and moons
Click below for 2:19 video from Bill Nye on Jupiter’s storm)
SaturnIt has the lowest density of all the planets.
It has over 60 known satellitesIts rings are made up of billions of pieces of rocks, ice and dust.
Titan is the only Saturn moon with an atmosphere.
UranusUranus is the coldest planet in the
solar system.It is tilted completely on its side so
the equator runs north to south because of impact from an asteroid .
It is the blue-green planet because of its methane gas.
It has rings.
NeptuneNeptune is the stormiest planet.
The planet has a system of thin dark rings .
Neptune has 8 known moons.
Pluto click below for 3:31 video about minor planets
Pluto, is now considered a "dwarf planet." A dwarf planet orbits the sun just like other planets, but it is smaller. A dwarf planet is so small it cannot clear other objects out of its path.
Pluto travels an oval pathway around the Sun.
The dwarf planet has three moons. Its largest moon is named Charon (KER-ən). Charon is about half the size of Pluto.
Meteoroids & MeteorsMeteoroid - any of the small solid
extraterrestrial bodies that hits the earth's atmosphere
Meteor - a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode• Meteorite – any part
of a meteoroid that survives the fall and reaches the planet’s surface
AsteroidsThe Asteroid Belt is
between Mars & Jupiter, but asteroids can be anywhere in the solar system.
A class of small bodies in orbit around the sun.
They are smaller than planets & sometimes called minor planets or planetoids.
They’re bigger than meteoroids.
Cometsa relatively small extraterrestrial body
consisting of a frozen mass that travels around the sun in a highly elliptical orbit click below for NASA video 3:06 mins
Kuiper Belt and Oort CloudThe Kuiper Belt and the Oort
Cloud surround our sun, a star. The Kuiper Belt is a doughnut-
shaped ring, extending just beyond the orbit of Neptune from about 30 to 55 AU.
The Oort Cloud is a spherical shell, occupying space at a distance between five thousand and 100 thousand AU.
The first mission to the Kuiper Belt is New Horizons spacecraft. New Horizons was launched in 2006 and will reach Pluto in 2015.
Click below for 4:40 min video
What else is out there?It seems unlikely that
other planets in our Solar System support life.
SETI, the “Search for ExtraTerrestrial Intelligence” is an independent non-profit.
The mission of the SETI Institute is to explore, understand and explain the origin, nature and prevalence of life in the universe.