1. The Sun, The Earth and The Moon

2. Facts about the Sun Diameter: 1,392,530 km across the Equator. Diameter: 1,392,530 km across the Equator. Containing more than 99.8% of the total mass of the Solar System, the Sun is by far the largest object in the Solar System. Containing more than 99.8% of the total mass of the Solar System, the Sun is by far the largest object in the Solar System. 109 Earths would be required to even fit across the Sun's disk, and the Sun's interior could hold over 1.3 million Earths. 109 Earths would be required to even fit across the Sun's disk, and the Sun's interior could hold over 1.3 million Earths. Within the core of the Sun, the temperature (15,000,000 K) and pressure (340 billion times Earth's air pressure at sea level) is so intense that nuclear reactions actually take place where atoms of hydrogen combine to produce atoms of Helium. Within the core of the Sun, the temperature (15,000,000 K) and pressure (340 billion times Earth's air pressure at sea level) is so intense that nuclear reactions actually take place where atoms of hydrogen combine to produce atoms of Helium.

3. Facts about the Sun The Sun's energy output, produced by these nuclear fusion reactions, is approximately 386 billion billion megawatts. The Sun's energy output, produced by these nuclear fusion reactions, is approximately 386 billion billion megawatts. The process that takes this energy to the surface of the sun following complex stages is called convection. The process that takes this energy to the surface of the sun following complex stages is called convection. This energy, released as heat as well as light, takes a million years to reach the surface. This energy, released as heat as well as light, takes a million years to reach the surface. The Sun also emits low density streams of particles, also known as the solar wind. These winds blow through the solar system at 450 km/sec and consist mostly of electrons and protons. The Sun also emits low density streams of particles, also known as the solar wind. These winds blow through the solar system at 450 km/sec and consist mostly of electrons and protons. The Sun consists of the core, photosphere, chromosphere and corona, each with differing temperatures and components. The Sun consists of the core, photosphere, chromosphere and corona, each with differing temperatures and components. Existing for about 4 and a half billion years, it has burnt up about half of the hydrogen in its core. This leaves the Sun's life expectancy to 5 billion more years, at which time, the Sun's elements will "swell" up, swallow Earth, and eventually die off into a small white dwarf. Existing for about 4 and a half billion years, it has burnt up about half of the hydrogen in its core. This leaves the Sun's life expectancy to 5 billion more years, at which time, the Sun's elements will "swell" up, swallow Earth, and eventually die off into a small white dwarf.

4. Facts about the Earth Mean distance from the Sun: 149,597,870 km Mean distance from the Sun: 149,597,870 km Equatorial Diameter: 12,756 km Equatorial Diameter: 12,756 km Mass:5.987 x 10 24 kg Mass:5.987 x 10 24 kg Length of Year: 365 days and 6 hours Length of Year: 365 days and 6 hours Orbital Speed: approx 30 km per second! Orbital Speed: approx 30 km per second! Solar Day: 24 hours Solar Day: 24 hours Temperature Range: -308 K to +328 K Temperature Range: -308 K to +328 K Atmospheric Composition: nitrogen, oxygen, and carbon dioxide Atmospheric Composition: nitrogen, oxygen, and carbon dioxide Natural Satellites: 1 (Moon) Natural Satellites: 1 (Moon)Moon

5. The Earth Orbits the Sun

6. Facts about the Moon Is a satellite of the Earth and orbits around it. Is a satellite of the Earth and orbits around it. Is the only object in space that man has ever visited. One reason is that the Moon is much closer to Earth than the other planets (about 385, 000 km). Is the only object in space that man has ever visited. One reason is that the Moon is much closer to Earth than the other planets (about 385, 000 km). Has a diameter of about 3,476 kilometres. Has a diameter of about 3,476 kilometres. Takes 28 days to make one orbit around the Earth. It also takes the Moon 28 days to complete one rotation on its axis. Takes 28 days to make one orbit around the Earth. It also takes the Moon 28 days to complete one rotation on its axis. Surface has many craters on it. These were formed by meteor crashes a long time ago. Surface has many craters on it. These were formed by meteor crashes a long time ago. Causes many of the tides in the Earth's oceans. This is because of the gravity force between the Earth and Moon. Causes many of the tides in the Earth's oceans. This is because of the gravity force between the Earth and Moon. Can be seen clearly with your eyes, binoculars, or a telescope. Can be seen clearly with your eyes, binoculars, or a telescope.

7. The Moon orbits the Earth The Moon orbits the Earth once every 28 days. The Moon orbits the Earth once every 28 days. This is known as a lunar month This is known as a lunar month

8. The Earth and Moon orbit the Sun together.

9. Phases of the moon The Moon appears to change shape over the course of a month. The Moon appears to change shape over the course of a month. The changes of shape are known as the phases of the moon. The changes of shape are known as the phases of the moon. This is because we are viewing it from a different angle each time. This is because we are viewing it from a different angle each time.

10. Day and Night The Earth rotates once on its axis every 24 hours The Earth rotates once on its axis every 24 hours The side which is lit up experiences daylight. The side which is lit up experiences daylight. The other side which is facing into deep space experiences night. The other side which is facing into deep space experiences night.

11. The Seasons The Seasons are caused by a change in the tilt of the Earth’s axis. The Seasons are caused by a change in the tilt of the Earth’s axis. In winter the axis is tilted away from the Sun. In winter the axis is tilted away from the Sun. In summer the axis is tilted towards the Sun. In summer the axis is tilted towards the Sun.

12. Solar Eclipse When the Moon blocks the light from the Sun, a small portion of the Earth experiences a Solar eclipse. When the Moon blocks the light from the Sun, a small portion of the Earth experiences a Solar eclipse. In an eclipse the light from the Sun is blocked, and the Earth plunged into darkness. In an eclipse the light from the Sun is blocked, and the Earth plunged into darkness.

13. Lunar Eclipse When the Moon is blocked by the Earth we see a Lunar eclipse. When the Moon is blocked by the Earth we see a Lunar eclipse. The Moon is temporarily hidden from view by the Earth’s own shadow. The Moon is temporarily hidden from view by the Earth’s own shadow. The red colour is caused by dust in the Earth’s atmosphere. The shade of red varies on how much dust there is. The red colour is caused by dust in the Earth’s atmosphere. The shade of red varies on how much dust there is.

14. The End