Heart murmur. Heart murmurs are heart sounds produced when blood flows across one of the heart valves that are loud enough to be heard with a stethoscope. There are two types of murmurs. A functional murmur or physiologic murmur is a heart murmur that is primarily due to physiologic conditions outside the heart. Other types of murmurs are due to structural defects in the heart itself.
Voyager 2 passed Neptune in the summer of 1989, the first spacecraft to observe that planet. Passing about 3,000 miles above Neptune's north pole, Voyager 2 made its closest approach to any planet since it left Earth 12 years earlier.
Like it's sister spacecraft, Voyager 2 also was designed to study the edge of our solar system beyond the planets. Uranus Accomplishments: Following its flybys of Jupiter and Saturn, Voyager 2 was to become the first spacecraft to visit Uranus. Voyager 2 is the only spacecraft to have flown by Uranus. The planet displayed little detail, but gave evidence of an ocean of boiling water about 800 km below the cloud tops.