Stars form inside massive clouds of gas and dust called nebulae. When gravity pulls the material together, the core becomes so hot that nuclear fusion begins — and a star is born.
Our Sun is a yellow dwarf (G-type main-sequence star). It’s neither the biggest nor the smallest, about average in size, but it provides all the energy needed to sustain life on Earth.
Stars like Eta Carinae and R136a1 are “hypergiants” — massive stars that shine millions of times brighter than the Sun and have much shorter lifespans.
Sound needs a medium (like air or water) to travel. Since space is a vacuum, no one can hear sounds — even a massive explosion — in space.
Light from distant stars takes years to reach us. When you look at a star that’s 1,000 light-years away, you’re seeing it as it was 1,000 years ago — not as it is today.
