Many other stars are visible to the naked eye at night Their immense distances from earth make them appear as fixed points of light. Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye. How does a star work How do they form, live, and eventually die Learn more about these distant objects and their major importance in the universe.
In a very broad sense, a star is simply one of those twinkling points of light you can see in the night sky But that’s not terribly satisfying in either lexicological or physical terms. The simplest way to describe a star is that it is a great ball of fire, but it is more complicated than that A star is a giant ball of hydrogen turning into helium through nuclear fusion. These large, swelling stars are known as red giants But there are different ways a star’s life can end, and its fate depends on how massive the star is.
A star is a massive, luminous ball of plasma that is held together by its own gravity The nearest star to earth is the sun, which is the source of most of the energy on earth Other stars are visible in the night sky, when they are not outshone by the sun. An ordinary star is a massive sphere of luminous gas, mainly hydrogen and helium. Where do stars come from Every star forms in a huge cloud of gas and dust
Over time, gravity causes the cloud to contract, drawing the gas closer and closer together As more gas accumulates at the center, it becomes denser and pressure increases This causes it to heat up and begin to glow.
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