when was the evidence of the appearance of galaxies found how was it discovered?

Hi Friends, Can any one explain this? about galaxies milkyways and how thz scientists came to know about this...its great to have such knowledge

Why Magnetic Field?

1)Why thr is always a magnetic field around a conductor with current flowing through it and viceversa? 2)Do Magneticfield act as an obstacle for every material passed between the two poles of the...

Do u think that Bhagat singh's assasination can be prevented if just Gandhi want

As we know that when Bhagat singh was ordered to hang till death it can be prevented as thr were strikes all over the country but the British left all over Mahatma Gandhi and except of making the...