Hindu concepts of Hiranyagarbha (golden womb) and Brahmanda (the first egg), are comparable to cosmic egg origin systems. The Bhagavata Purana, Brahmanda Purana, Vayu Purana among others contain references to the initial process of the origins of the universe as a cosmic egg. The twelve-phase creation of the universe and the history of our Brahmanda is described in Srimad Bhagavatam.
The Hiranyagarbha Sukta announces: Hiranyagarbhah samavartatagre bhutasya jatah patireka asit, which means, Before creation existed the golden womb Hiranyagarbha, Lord of everything born. (Rig Veda 10.121.1)
The whole Cosmos including the sun, moon, planets, and galaxies was all inside the egg, and the egg was surrounded by ten qualities from outside. (Vayu Purana 4.74-75)
Before creation, it was only the Braham that was everywhere. There was no day, night, or sky. First I created the waters. And in the waters, I sowed the seeds of Brahmanda, the great egg. From this seed, there developed an egg that began to float on the waters. This egg is known as Brahamand (Universe/ Cosmos)
Modern Science says about Universe:
This is the structure of the Cosmos created by scientists after a research of many years. If we take a look at the COBE results, we notice the uneven pattern in the radiation stemming from the decoupling of matter and radiation when the Cosmos was a mere 300,000 years old. The blue and magenta patterns represent areas that were slightly cooler and slightly warmer than average. These variations are at a level of about 1:100,000, but they must have been enough to seed the structures we see today.
Finally, we came to the conclusion that Cosmos is shaped like an egg but this information was already present in Hindu Literature.
(Alan Kogut, NASA)