The Milky Way Galaxy
A galaxy is a massive system of billions of stars, gas, and dust held together by gravity.
- Our Galaxy: Our Solar System belongs to the Milky Way Galaxy (known as Ākāśha Gangā in Hindi).
- Appearance: From a dark location on Earth, it looks like a faint, milky band of light stretching across the sky.
The Universe
The Universe contains everything that exists—all matter, energy, planets, stars, and galaxies.
- It contains billions of galaxies.
- Scientists are constantly studying the universe to understand its origin and size.
Hierarchy of the Cosmos
Are we alone?
Scientists are searching for Exoplanets (planets orbiting other stars) to see if life exists elsewhere. While no life has been found yet, the search continues using powerful telescopes.