13.15 Other Objects in our Solar System

The Moon• the moon orbits Earth every 27.3

days

• the moon rotates once on its axis as it completes one orbit around Earth

• as a result, we see only one side of the moon

• The amount of illumination we see changes – the phases of the moon

Did you know …..

The Tides

FULL

QUARTER

CRESCENT

GIBBOUS

FOUR MAIN SHAPES

Moon PhasesWaxing - increasing

Waning - decreasing

Waxing Crescent

SOLAR ECLIPSE

Occurs whenever the shadow of the Moon falls on Earth’s surface, the Moon is between the Sun and the Earth.

SOLAR ECLIPSES

LUNAR ECLIPSE• an event where Earth moves directly

between the Sun and Moon so that Earth casts its shadow on the Moon

Eclipses

Asteroids

• small, non-spherical objects that are thought to be debris left over from the formation of the solar system.

• most are in the asteroid belt found between Mars and Jupiter

Trans-Neptunian Objects

•objects beyond the orbit of Neptune

•found in the Kuiper Belt

•Pluto is found in the Kuiper Belt

Oort Cloud

• At the farthest reaches of the Sun’s gravitational influence is a spherical cloud of icy fragments called Oort.

Comets• Most start in the Kuiper Belt

and the Oort cloud.

• When it gets close to the Sun, the comet is warmed by solar radiation and the frozen substances become gases

• these gases are pushed outward by solar wind and radiation, forming a bright, glowing tail

Meteoroids, Meteors, and Meteorites

• Meteoroids: pieces of rock moving through space

• Meteors: a meteoroid that reaches Earth’s atmosphere and burns up due to atmospheric friction.

• Meteorites: a meteoroid that is large enough to pass through Earth’s atmosphere and reach the ground without being totally burned up.

HOMEWORK:• Read pg. 430 - 433

• Answer # 2 – 6, 11 on pg. 433