This results in residents and objects inside the Station to remain suspended as the ISS falls to Earth. Though weight does not have any influence on the rate of gravitational descent, so residents inside the ISS fall at the same rate as the Station.

The ISS is subject to nearly as much gravity as we are down here on the ground. This also allows for ISS residents to experience micro-gravity. At speeds of that magnitude the ISS can make many orbits around Earth before having to fire altitude boosters. With the lack of density in the atmosphere the ISS can comfortably achieve speeds of 17,500 mph.

At this height, the ISS resides in the Thermosphere of Earth's atmosphere and is not vulnerable to the dense atmospheric resistance of the Troposphere (where we live) and the Stratosphere. The ISS orbits Earth at an average height of 200 miles. Since then, the ISS has been continuously occupied with human residents. The initial assembly of the ISS started in November 1998 with the first crew to reside on the Station (Expedition 1) arriving in November 2000. The ISS has served as humanity's first continuous presence in space. Sometimes we do not have any visible passes of the ISS as it orbits below the horizon, is in Earth's shadow, or passes during daylight hours.

As a result we have visibility periods where the ISS will appear in the morning hours before sunrise or in the evening hours after sunset. This orbital period and inclination cause the ISS to change its visible position as it relates to an Earth-bound observer. The ISS orbits planet Earth once every 93 minutes at a 51.6° inclination to Earth's equator. Periodically throughout the year, the International Space Station (ISS) becomes visible in the evening sky, offering up stunning opportunities to view bright nightly passes for a few weeks.

Seeing iss from earth