Question : In early 1610, who discovered with his newly invented telescope that Jupiter has four moons?
Option 1: Simon Marius
Option 2: Tycho Brahe
Option 3: Galileo Galilei
Option 4: Johannes Kepler
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Correct Answer: Galileo Galilei
Solution : The correct answer is Galileo Galilei.
In early 1610, Galileo Galilei discovered that Jupiter has four moons using his newly invented telescope. These moons are now known as the Galilean moons. In 1609, Galileo constructed his first telescope, which was a simple refracting telescope. His telescope consisted of a convex objective lens and a concave eyepiece lens.
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Question : In 1664, who discovered the fifth star in the Trapezium, an asterism (mini-constellation) in the constellation Orion?
Question : Who was the first to accurately describe the rings of Saturn as a disc around the planet in 1655?
Question : In the early 1800s, who discovered that each chemical element is made up of a unique type of atom and that atoms differ by their mass?
Question : The following sentence has been split into four segments.Identify the segment that contains a grammatical error.
Binay said that / he is coming / from / his village, Jaygarh.
Question : Select the option that expresses the given sentence in passive voice.
The Mesopotamians invented the decimal system.
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