Gravitational force:
- Causes moons to orbit planets
- The Earth's moon rotates on own axis every 27.5 days and from Earth we always see the same side of the moon
- Causes the planets to orbit the Suns
- Mercury
- Venus
- Earth
- Mars
- asteroid belt
- Jupiter
- Saturn
- Uranus
- Neptune
- Causes artificial satellites to orbit the Earth
- Causes comets to orbit the sun
- Balls of ice and dust
- orbits the sun
- tail formed when near the sun which points away from the sun called solar wind
- speed INCREASES when close to the sun due to gravitational pull
- elliptical (egg-shaped) orbit
Orbits are objects that travel in a circle and is the balance between a forward motion of object and force pulling inwards
Orbital speed= (2 x π x orbital radius) / Time period
V= (2 x π x r) / T
The universe is a large collection of billions of galaxies, which is a large collection of a billion stars. Our solar system is called the Milky Way
