The first anniversary of the 500-meter spherical radio telescope (FAST)?

The 500-meter spherical radio telescope (FAST) has been built for more than a year. It was built in September 20 16, and it will be the third anniversary in September 20 19. The 500-meter spherical radio telescope (FAST) is called the "500-meter spherical radio telescope". It is the largest radio telescope with single aperture and the highest sensitivity in the world. It was completed in Guizhou in September of 20 16.

The 500-meter spherical radio telescope (FAST) was conceived by China astronomer Nan Yu 1994. It took 22 years to build and was put into use on September 25th, 20th16th. It is the largest single-aperture and most sensitive radio telescope in the world, which is led by the National Astronomical Observatory of Chinese Academy of Sciences and has independent intellectual property rights in China. The comprehensive performance is ten times that of the famous radio telescope Arecibo.

As of September 12, 2065438, 59 high-quality pulsar candidates have been discovered by the 500-meter spherical radio telescope, of which 44 have been confirmed as newly discovered pulsars.

Extended data:

Known as the "500-meter spherical radio telescope (FAST)", the FAST radio telescope has its unique skills:

Trick 1: look far with a big caliber

Sensitivity is the most important index parameter of radio telescope. The higher the sensitivity, the stronger the telescope's ability to detect weak radio. In order to improve the sensitivity, it is necessary to enlarge the aperture of the radio telescope. The caliber of FAST has reached the highest in the world-500 meters. Theoretically, FAST can receive electromagnetic signals 65.438+037 billion light years away, which is close to the edge of the universe.

Stunt 2: flexible giant eyes

According to the working principle of FAST, when observing celestial bodies, it will form a 300-meter-diameter instantaneous paraboloid on the active reflection surface of its 500-meter spherical cap in real time with the change of celestial orientation, and gather electromagnetic waves through this 300-meter paraboloid.

Figuratively speaking, if FAST is compared to a giant eye, then the eyeball diameter of this giant eye is 500 meters, and the eyeball responsible for receiving light is 300 meters. FAST relies on this huge flexible eye to collect electromagnetic waves and observe deep space.

Stunt 3: Millimeter accuracy

The design goal of FAST is to collect signals covering 30 football fields in a pill-sized space, otherwise the weak radio signals in the universe cannot be monitored. The 500-meter structure, like hair, is full of millimeter-level accuracy requirements.

More than 7000 arm-thick steel cables are used to weave the cable net, and the machining accuracy of each steel cable is controlled within one millimeter; The final accuracy of the 500m diameter antenna is 3mm, and the manufacturing accuracy of each small panel is1.5mm..

Baidu Encyclopedia -500-meter spherical radio telescope

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