[Hank Green] posted an interesting video about the first liquid mirror telescope from back in the 1850s. At the time, scientists were not impressed. But, these days, people are revisiting the idea.

Publications of the Astronomical Society of the Pacific, Vol. 119, No. 854 (April 2007), pp. 456-465 (10 pages) ABSTRACT The quality of astronomical images obtained with the 3 m liquid‐mirror ...

[Hank Green] posted an interesting video about the first liquid mirror telescope from back in the 1850s. At the time, scientists were not impressed. But, these days, people are revisiting the idea.