A primary reason is that viruses do not possess a cell membrane or metabolise on their own - characteristics of all living organisms. Examples of common human diseases caused by viruses include the common cold, the flu, chickenpox and cold sores.
In the past spacecraft have taken greatly different amounts of time to make it to Saturn. Pioneer 11 took six and a half years to arrive. Voyager 1 took three years and two months, Voyager 2 took four years, and the Cassini spacecraft took six years and nine months to arrive. The New Horizons spacecraft took a short two years and four months to arrive on the scene.
Confidence votes 3.0K. The sidereal rotational period of Saturn (1 Saturn day) is 10 hours 45 minutes and 45 seconds which is about 0.4484375 Earth days. The orbital period of Saturn is 29.4571 Earth years or 10,759.22 Earth days (24,491.07 Saturn days).