The farthest objects in our Universe discovered by modern astronomers

1.	The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us?
Answer» Distance of the quasar from the earth = Distance travelled by light in 3 billion years = 3 × 10⁵ kms^-1 × 3 × 10⁹ × 365 × 24 × 3600 = 2.8 × 10²² km.

The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us?

Answer»

Distance of the quasar from the earth = Distance travelled by light in 3 billion years

= 3 × 10⁵ kms^-1 × 3 × 10⁹ × 365 × 24 × 3600

= 2.8 × 10²² km.