Astrophysics

The average distance between the Sun and the Earth is called

• Astronomical unit

• Parsec

• Light year

• Parallax distance

Which of the following is the evidence of the expansion of universe?

• Blue shift

• Red shift

• Cosmic microwave background radiation (CMBR)

• Supernova

What is responsible for the creation of universe?

• Dark matter

• Dark energy

• Supernova

• Formation of galaxies

Which of the following equations represents Hubble's law?

• v = Hd

• v = H/d

• d = vH

• H = d/v

What is the approximate position of giants in the shown HR diagram?

• D

• C

• A

• B

Apparent brightness of a star is defined as

• energy emitted per unit surface area

• energy emitted per second per unit surface area

• power emitted per second per unit surface area

• energy emitted per second

A group of stars in a recognizable pattern is called as

• Nebulae

• Stellar Cluster

• Constellation

• Galaxy

The nuclear reaction that takes place in the core of the stars is

• Nuclear disposition

• Nuclear fission

• Nuclear fusion

• Nuclear composition

Stellar equilibrium means

• Radiation pressure inside a star is greater than gravitational pull of the molecules

• Gravitational pull of molecules inside a star is greater than the radiation pressure

• Radiation pressure inside a star is equal to the gravitational pull of the molecules

Our sun in the milky way galaxy belongs to the main sequence stars of HR Diagram

• True

• False