BY: SAMANTHA 9B Space and Gravity

Definitions Gravity- the force that attracts a body towards the centre of the earth, or towards any other physical body having mass Mass- a large body of matter with no definite shape Weight- a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.

Difference between mass and weight Mass is a measure of how much matter an object has. Weight is a measure of how strongly gravity pulls on that matter.

Earth’s Elliptical Orbit Around the June Solstice, the North Pole is tilted toward the Sun and the Northern Hemisphere gets more of the Sun's direct rays. This is why June, July and August are summer months in the Northern Hemisphere.June SolsticeJuneJulyAugust At the same time, the Southern Hemisphere points away from the Sun, meking this the winter season there, while summer in the Southern Hemisphere happens in December, January, and February, when the South Pole is tilted toward the Sun and the Northern Hemisphere is tilted away.DecemberJanuaryFebruary

Planets The number of planets dropped to the eight significantly larger bodies that had cleared their orbit (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune), and a new class of dwarf planets was created, initially containing three objects (Ceres, Pluto and Eris).

Definitions Planet- a celestial body moving in an elliptical orbit round a star. Natural Satellite- A natural satellite, or moon is a celestial body that orbits another celestial body of greater mass (e.g. a planet, star, or dwarf planet), called its primary. For example, the Moon is a natural satellite of Earth, and Earth is a natural satellite of the Sun. Artificial Satellite- Artificial satellites are human- built objects orbiting the Earth and other planets in the Solar System.

Parts of Space Star Galaxy Universe

Definitions Visible light- Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes. Infrared radiation- Infrared radiation is a type of electromagnetic radiation, as are radio waves, ultraviolet radiation, X-rays and microwaves. Electromagnetic spectrum- the range of wavelengths or frequencies over which electromagnetic radiation extends.

Telescopes One of the earliest tools for space exploration was the telescope.spacetelescope. Space Telescope was launched into outer space. SpaceTelescopeouterspace Different types of telescopes usually don't take simultaneous readings. Space is a dynamic system, so an image taken at one time is not necessarily the precise equivalent of an image of the same phenomena taken at a later time.

Space Probes A space probe is an unpiloted, unmanned device sent to explore space and gather scientific information. A space probe is launched from Earth with a set of scientific instruments and tools used to study the atmosphere and composition of space and other planets, moons, or celestial bodies.

Factors that affect the strength of gravity The strength of the gravitational force between two objects depends on two factors, mass and distance. The force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.

How gravity can affect the motion of planets, moons, stars and space crafts The bigger you get, the stronger the gravitational pull towards the center of the earth. So size is a big factor that affects gravity. Gravity has played a big part in making the universe the way it is. Gravity is what makes pieces of matter clump together into planets, moons, and stars.