Answer:
Obama it depends what they bought at that time period
Answer:
A, B, and D.
Explanation:
The correct answer is option A, B, and D.
Astronomical telescope is a device which is used to observe distant heavenly bodies like stars, planets,sun,satellites, and etc.
when the size of the lens decreases the chromatic aberration is minimized.
Large astronomical telescopes are reflectors because chromatic aberration is minimized, they are shorter in size and they are also not heavy.
Yes because even if you spend more time on one thing studying it you will have better knowledge of it then if you didn’t spend that much time because you mind will remember it better