The space probe Voyager 1 leaves the solar system with the needle of the diamond phonograph

Recently, NASA’s Jet Propulsion Laboratory issued a statement that data from the Voyager 1 probe launched in 1977 showed that it had reached the edge of the solar system.

The most special thing about this spacecraft, which is on the mission of pursuing the civilization of the universe, is that it carries a copper disk record. The record is 12 inches thick, has a gold-plated surface, and contains a diamond phonograph needle. Diamond has high Young's modulus and elastic modulus, which is convenient for high-fidelity transmission of high-frequency acoustic waves. It is the most ideal material for loudspeaker high-frequency diaphragm.

A "letter" written to an extraterrestrial civilization also extended its effective use time to one billion years later due to its unique diamond phonograph needle device. After being far away from the solar system, "Voyager 1" will also carry the greetings of the people on Earth towards the center of the Milky Way at a speed of 17 kilometers per second.