Can the sun grow larger

Yes, the Sun can grow larger over time as it evolves. In about 5 billion years, it will enter the red giant phase, during which it will expand significantly, potentially engulfing the inner planets, including Earth. This growth is a natural part of its life cycle as it exhausts its hydrogen fuel and begins to fuse helium in its core. Eventually, it will shed its outer layers and shrink down to become a white dwarf.