Where are we in space and why does it matter?

Where is Our galaxy in the universe?

Our Galaxy

• Our galaxy is called the Milky way.
• It is called the Milky way because there are so many stars clumped together it looks milky.
• Our galaxy is located among billions of other galaxies.
• No one knows exactly where we are in our universe.
• Our galaxy is a part of a cluster of galaxies called the local group

Our Galaxy Cont.

• There are over 200 Billion stars in our galaxy.
• In the center there is a black hole
• This is why we are located in the middle

Where is our solar system in our galaxy?

The Solar System

• The solar system consists of 8 planets and the sun
• The solar system is on one of the rings of the milky way.
• The mass of the solar system is 99% the sun.

Inner Planets

• The Inner planets consist of Mercury, Venus, Earth, and Mars.

Outer Planets

• The outer planets are Jupiter, Saturn, Uranus, Neptune.

Where are we in our solar system

Earth

Earth

• Earth is tilted on its axis 23.5 degrees. This causes the different seasons. If we weren't tilted we wouldn't have any seasons.
• When the earth rotates on its axis this causes day and night. So when we are having day Asia and that side of the globe is having night.v
• When we are tilted on our axis direct sunlight gets hit on different spots which causes different seasons in different spots.

Untitled Slide

THE EARTHS ROTATION

• when the earth rotates around the sun this causes a year but also when we rotate around the sun our planet gets heat and light on different sides of the earth.
• The earth revolves around the sun at a speed of 18.5 miles per second.
• The distance from the sun and the earth is roughly 93 million miles away.

EARTHS DISTANCE AND SPEED

• The distance and the speed of the earth from the sun causes the earth to stay in orbit with the sun. So if we were to slow down or speed up then we would fly out of orbit.

EARTHS INERTIA

• What keeps us in orbit are two things called gravity and inertia. Gravity is when two objects have a force between each other that pull them together. Inertia is when an object in motion will stay in motion forever until a force stops it or if an object is stopped it wont start until an object starts it.

THE MOON AND ITS PHASES

• There are 8 stages in the moons phases. New moon, waxing crescent, first quarter, waxing gibbous, full moon,waning gibbous, last quarter, and waning crescent.

THE MOONS PHASES

The moon Cont.

• The moon has two eclipses, the lunar and the solar eclipse.
• The lunar eclipse is when the moon passes behind the earth and the earth casts a shadow on the moon.
• A solar eclipse is when the moon passes over the sun and casts a shadow on the sun.

THE MOON Cont.

• The moon causes tides like high tides and low tides.
• What happens is the moon and the sun line up with each other to create spring tide which causes larger high and low tides. Then sometimes the moon and the sun are at a 90 degree angle which causes neap tide which is lower high and low tides.

Interesting fact

• Days on earth are slowly growing 17 milliseconds every hundred years. But it would take over 140 million years to get to 25 hours a day.