1796 में किस विद्वान ने निहारिका परिकल्पना (Nebular Hypothesis) का संशोधित रूप प्रस्तुत किया, जिसमें यह प्रस्ताव दिया गया था कि ग्रहों का निर्माण सूर्य को घेरने वाले पदार्थ के बादल से हुआ था?

The 'Interstellar Dust Hypothesis', which suggests that the Earth and other planets were formed from gas and dust clouds surrounding the Sun, was propounded by:

Who among the following proposed the 'Big Bang Theory', which is the widely accepted explanation for the origin of the universe?