1. Satellite: an object which orbits planets or stars

2. Types of satellite orbits

• HIgh Earth Orbit (HEO)
• Low Earth Orbit (LEO)
• Geosynchronous Orbit (GSO)
• Geostationary Orbit (GEO)
• Medium Earth Orbit (MEO)

3. Orbit shapes:

• Circular
• Elliptical

4. Specific positions of satellites in the orbits:

• Apogee
• Perigee

5. Relationship between orbital height and satellite velocity

• The higher the orbital height of a satellite, the lower the satellite speed for it to remain in orbit 
• This is because the gravitational force on a satellite decreases when the orbital height of the satellite increases

6. Methods of sending launch vehicles into orbit

• lauch vehicles: used to send satellites or spacecraft into outer space
  • expendable launch vehicle (ELV)
  • reusable launch vehicle (RLV)
• ways to send launch vehicles into orbit:
  • directly into orbit
  • Hohmann transfer orbit

7. Zero gravity: the condition when no significant gravitational force effect is felt

8. Impact of rapid development in space technology:

• increased waste in space / space junk
• increase in research and development activities