Astronomy | Astrophysics Answers

Explain Hubble’s scheme of galaxy classification with the help of a diagram. Describe the prominent features of spiral galaxies.

Discuss the rotation curve of our Galaxy. What inferences can be drawn from it about the structure of our Galaxy?

Explain the difference between rigid body rotation and Keplerian motion. What is galactic longitude?

 What is planetary nebula? Explain the concept of Chandrasekhar limit.

Explain the concept of degeneracy pressure. What role does it play in the evolution of a star after its death?

What are the characteristic features of the H II region of ISM? How is it different from the molecular cloud?

What is solar nebula? Explain the formation of nebular disk.

What are the main differences between the terrestrial and jovian planets? How does the ring system of jovian planets persist for so long? 

Explain helioseismology. How does it help in understanding the internal structure of the Sun?

What is the nature of radiation generated in the Sun’s interior? How does it differ from the radiation we receive from the Sun? What causes granulation of the photosphere?