With reference to the origin of the universe, the evolutionary sequence of stars, and our solar system, consider the following statements:

1. 1. The most accepted 'Big Bang Theory' related to the origin of the universe was propounded by Georges Lemaître, according to which about 13.8 billion years ago, the entire universe was concentrated as a super-dense, high-temperature micro 'singularity' point, after which space and time started expanding following a sudden massive explosion.
2. 2. In the life cycle of stars, when the hydrogen fuel at the core of a star is exhausted and helium fusion begins, its outer envelope expands and it transforms into a 'Red Giant', whereas stars many times larger than the Sun end their lives in a 'Supernova' explosion, turning into either a neutron star or a black hole.
3. 3. The two largest planets of our solar system—Jupiter and Saturn—are Gas Giants, while Mercury, Venus, Earth, and Mars are called Terrestrial Planets, which are made of rocks and metals and have a much higher density than the outer planets.
4. 4. The Asteroid Belt located outside the solar system is primarily situated between the orbits of Mars and Jupiter, where small celestial bodies revolve around the Sun, and the dwarf planet 'Pluto' is also located in this belt.

Which of the above statements is/are completely correct?