Asteroid Belt. About 2-4 AU (186-370 million miles) away from the Sun, between the orbits of Mars and Jupiter, is a region called the Asteroid Belt. This region is a ring of tens of thousands of relatively small rocky objects called Asteroids. Asteroids can vary greatly in size.
A normal pulse rate for a healthy adult, while resting, can range from 60 to 100 beats per minute, depending on athletic ability. [ Source: http://www.chacha.com/question/what-is-your-pulse-supposed-to-be ].
Resting Heart Rate. A normal resting heart rate for an adult ranges between 60 and 80 beats per minute, according to the University of Maryland Medical Center. To find your heart rate, place your fingers on the side of your wrist or on your neck next to your windpipe until you feel your pulse.