Why Were Telescopes with Very Large,thin Mirrors NOT Built 50

question 43

Short Answer

Why were telescopes with very large,thin mirrors NOT built 50 years ago?

---

Definitions:

Aquifers

Underground layers of water-bearing permeable rock, rock fractures, or unconsolidated materials from which groundwater can be extracted using wells.

Alternative Fuels

Fuels other than the traditional choices (like petroleum), including renewable sources like biofuel, electricity, hydrogen, and others, aimed at reducing pollution and dependency on fossil fuels.

Oil Exploration

The process of searching for oil and gas reserves underground or underwater.

Subsidies

Government grants or financial support to businesses, individuals, or organizations to encourage the production of goods, reduce costs, or support public objectives.