courses:ast201:7
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| courses:ast201:7 [2023/11/26 00:02] – [4. Ground-based telescopes] asad | courses:ast201:7 [2023/11/26 00:02] (current) – [3.3 Pros and cons] asad | ||
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| Disadvantages are as follows. | Disadvantages are as follows. | ||
| - | - Cost. One 8-m Gemini telescope cost $100 million, and one 2.4-m HST telescope cost $2 billion. | + | - Cost. One 8-m Gemini telescope cost 100 million |
| - Thermal stress | - Thermal stress | ||
| - Harmful radiation, high-energy particles | - Harmful radiation, high-energy particles | ||
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