Question

How far away is the first pulsar from the earth?

Answer 1

The nearest known Pulsar PSR J0108-1431 is about 424 light years away from the Earth.

Explanation:

PSR J0108-1431 is located about 130 Parsecs ( 424 lightyears ) away from the Earth.
It was discovered in 1994 in the Parkes Southern Pulsar Survey.
It has a rotation period of 0.8 seconds.

Source:
PSR_J0108-1431 Wikipedia
iop.org