The Life of a Star for Kids: From Nebula to Black Hole (Grade 6 and Grade 7 Science)

Hi, I'm Luna from DoodleBeez. Stars look like they shine forever, but they don't. Stars are born, they live for millions or billions of years, and then they die. Today we follow the amazing life of a star.

Every star begins in a nebula, a giant cloud of gas and dust. Gravity pulls some of the gas together into a hot, spinning ball called a protostar. It keeps shrinking and heating up.

When the core gets hot enough, nuclear fusion begins. Hydrogen joins together to make helium, releasing huge amounts of light and heat. The star is now a main sequence star, like our Sun. This is the longest stage of its life.

A star's life depends on its mass. Big, heavy stars burn their fuel much faster, so they live shorter lives. Small stars burn slowly and can shine for many billions of years. Our Sun is about halfway through its life.

When a star like our Sun runs low on hydrogen, it swells into a red giant. Later, it gently puffs its outer layers into space as a glowing cloud. The small, hot core left behind is called a white dwarf.

Massive stars end with a bang. They swell into red supergiants, then explode in a supernova, one of the brightest events in the universe. What is left becomes a tiny, heavy neutron star, or for the biggest stars, a black hole.

Now it's your turn. A star is much more massive than our Sun. Will it end as a white dwarf, or will it explode as a supernova? Pause and try. It will explode as a supernova, leaving a neutron star or a black hole.

Great job! Stars form in nebulas and shine by fusion. Stars like our Sun end as white dwarfs. Massive stars explode as supernovas. Practice the life of a star in the Science Lab at doodlebeez.com. See you next time!