Select the most appropriate option to fill in the blanks.
Nicholas Copernicus is famous for showing the world that the sun is the ________ of the universe in 1543 AD in Poland. He also noticed that some planets appeared to change directions when moving ________ the sky. Earlier astronomers believed in the phenomenon of retrograde motion but Copernicus saw it as ________ that earth orbited the sun like other planets did.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2, i.e., centre; across; proof.
Filler Concept: We need words that correctly fit the scientific and grammatical context.
Explanation:
centre: The sun is the centre of the universe (Heliocentric theory).
across: Planets appear to change directions when moving across the sky.
proof: Copernicus saw this as proof that Earth orbited the sun.
Correction:
Nicholas Copernicus is famous for showing the world that the sun is the centre of the universe in 1543 AD in Poland. He also noticed that some planets appeared to change directions when moving across the sky. Earlier astronomers believed in the phenomenon of retrograde motion but Copernicus saw it as proof that earth orbited the sun like other planets did.
Final Sentence: centre; across; proof
Conclusion: The correct answer is “centre; across; proof.”