What does the acronym FAST refer to in astronomy?

Question

In astronomy, what is the word applied to the alignment of three or more celestial bodies in the same gravitational system along a straight line?

Answer 1

An Earth-based radio telescope
The Five-hundred-meter Aperture Spherical Telescope (FAST) in the remote Pingtang county in southwest China's Guizhou province was declared fully operational on 11 January 2020. It is nicknamed Tianyan, or the Eye of Heaven. It is the largest filled-aperture radio telescope to date. It uses an active surface made of 4,450 panels to form a moving parabola of metal panels in real time. Its stated objectives are: large scale neutral hydrogen survey; pulsar observations; leading the international very long baseline interferometry; detection of interstellar molecules; detection of interstellar communication signals; pulsar timing arrays.