a telescopic device for reflecting the light of a star in a constant direction, the chief component of which is a plane mirror turned by a clock mechanism to correct for the rotation of the earth.
更多siderostat例句
The telescope was housed at the Exhibition in a long gallery pointing due north and south, the siderostat at the north end.
The siderostat, twenty-seven feet high, and as many in length, weighed forty-five tons.
The movable portion of the roof of the building had been slid back, and the mirror of the siderostat stood bared to the sky.