In 1950, which Russian astronomer revised the 'nebular hypothesis, proposing that the sun is surrounded by a solar nebula consisting mainly of hydrogen and helium as well as dust?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Otto Schmidt
- In 1950, Otto Schmidt, a Russian astronomer, revised the nebular hypothesis, proposing that the Sun is encircled by a solar nebula composed primarily of hydrogen, helium, and dust.
- This hypothesis suggests that planets and other celestial bodies formed from the gravitational collapse and condensation of this nebula, providing a theoretical framework for understanding the origin of the solar system.