■ Scientists have lately found out about some stars throbbing with sounds more like Knocking.
■ They have found that these stars send out very strong waves that can penetrate or puncture any surface including planet Earth.
● Pulsars originate when an old, massive star explodes as a supernova. In this process, the core of the star implodes. The core collapses through the white dwarf stage until its constituent protons and electrons combine to form neutrons.
● If it is not too massive (less than 1.4 times the mass of the Sun) it can stabilize at this point as a very hot, incredibly dense ball of neutrons with a thin crust of ordinary matter on its surface.
● Neutron stars are spinning rapidly when they form - up to about 800 and even one thousand rotations per second - and slow down as they age. These pulses of the pulsar are reminiscent of heart-beats or someone's knocking quickly at door.
■ Accordingly, they described it as universal knockers or hammers.
The Quran described that 1400 years ago with these two words; the Knocker and the piercing. Allah says in the Holy Quran
"[I swear] by Heaven and ➫ the Knocker (Al-Tarek) And what will convey to you [O, Muhammad] what the Knocker is! (It is) ➫ the star of ➫ piercing brightness" [Qur'an, 86:1-3]
■ The word s Al-Tarek and the word Al-Thakeb are two different Arabic words that are used in the above-mentioned verse to describe the Pulsar the word Al-Tarek means in English " the Knocker or that beats quickly and the word " Al-Thakeb" means " piercing ", these two characteristics (knocker and piercing) are one of the most specific features of this lately found stars.
➫ Soon will We show them our Signs in the (furthest) regions (of the earth), and in their own souls, until it becomes manifest to them that this is the Truth. Is it not enough that thy Lord doth witness all things? [Quran 41:53]