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.
voyager 1 is a space probe launched by nasa on september 5 1977 part of the voyager program to study the outer solar system voyager 1 launched 16 days after its twin voyager 2having operated for 38 years 1 month and 14 days the spacecraft still communicates with the deep space network to receive routine commands and return dataart of the voyager program to study the outer solar system voyager 1 launched 16 days after its twin voyager 2 having operated for 38 years 1 month and 14 days the spacecraft still communicates with the deep space network to receive routine commands and return data