EARTH
• Spins around the sun on its AXIS. This is called the ROTATION of earth.
• It tilts and the revolution causes SEASONS!
• It is an INNER planet.
MERCURY
• Second smallest planet.• Closest planet to the sun
• Its surface is scarred by craters.• Is an INNER planet.
VENUS
• Its surface is surrounded by thick clouds.• Second closest planet to the sun
• It is an INNER planet.
MARS
• Iron oxide, known as rust, is found in its rocks.
• Fourth planet from the sun• Is an INNER planet.
JUPITER
• Fifth planet from the sun• Largest planet
• Has the shortest day• Is an OUTER planet.
SATURN
• Sixth planet from the sun.• Orbited by at least 30 moons.• OUTER planet.
URANUS
• Seventh planet from the sun• Is an OUTER planet
• Has rings
NEPTUNE
• Eighth planet from the sun.• Is an OUTER planet. • Known as a gas planet.
PLUTO
• Now known as a “Dwarf Planet”• Smaller than Earth’s moon
Earth’s Moon
• Takes 28 days to orbit the Earth.• Wane:• Wax:• Eclipse:
Asteroids
• Pieces of rock.• Made of minerals similar to those that
formed rocky planets and moons
SUN
• The distance from Earth to the sun is measured in ASTRONOMICAL UNITS.
STARS
• Scientists believe they began as huge clouds of gas and dust.
• A group of stars that form a pattern is a CONSTELLATION.
• Scientist infer there are 100 billion stars in the universe.
COMETS
• Large body of ice and rock• They appear to glow
• Travel in an elliptical orbit.
GALAXIES
• Made of: Stars, gas and dust.• Shapes are: Spiral, Elliptical and Irregular• We live in the Milky Way Galaxy. It is Spiral.• You can’t see the entire Milky Way from
Earth because Earth is INSIDE the Milky Way.