淋完衫
2018-3-9 15:54:37
According to NASA, there are at least four different kinds of moonquakes:
Deep moonquakes (~700 km below the surface, probably tidal in origin) Meteorite impact vibrations
Thermal moonquakes (the frigid lunar crust expands when sunlight returns after the two-week lunar night)
Shallow moonquakes (20 or 30 kilometers below the surface)
好似計左 hohoho
淋完衫
2018-3-9 15:56:54
Information about moonquakes comes from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972. The instruments placed by the Apollo 12, 14, 15 and 16 functioned perfectly until they were switched off in 1977.
除咗數式其他都明