### What are the differences between high earth orbits and low earth orbits?

Chapter No. 10: Space Missions,

What are the differences between high earth orbits and low earth orbits?

 High earth orbits Low earth orbits Height from the earth's surface for these orbits is greater than or equal to 35780 km. Height from the earth's surface for these orbits is between 180 km and 2000 km. Satellites revolving in these orbits take around 24 hours to complete one revolution around the earth. Satellites revolving in these orbits take around 90 minutes to complete one revolution around the earth. The satellites appear stationary with respect to earth. The satellites do not appear stationary with respect to earth. Critical velocity of satellites revolving in these orbits is higher than that of satellites revolving in low earth orbits. Critical velocity of satellites revolving in these orbits is lower than that of satellites revolving in high earth orbits. Example: Geostationary satellites revolving parallel to equator of the earth revolve in these orbits. Example: International space station and Hubble telescope revolve in these orbits.