question 19\nwhich of the following was not observed by galileo?\nstellar parallax\nmountains & valleys in…

question 19\nwhich of the following was not observed by galileo?\nstellar parallax\nmountains & valleys in the moon\nphases of venus\n4 moons orbiting jupiter
Answer
Brief Explanations:
Galileo observed mountains and valleys on the Moon, phases of Venus, and 4 moons orbiting Jupiter. Stellar parallax was not observed by him due to the limitations of his instruments and the vast distances involved.
Answer:
A. stellar parallax