What is a star witch They may tell us more about how galaxies form. How to use star in a sentence. A star is a luminous spheroid of plasma held together by self-gravity. A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. May 2, 2025 · A star’s gas provides its fuel, and its mass determines how rapidly it runs through its supply, with lower-mass stars burning longer, dimmer, and cooler than very massive stars. When this happens, a tremendous amount of energy is created causing the star to heat up and shine. Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye. May 8, 2025 · 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. The meaning of STAR is a natural luminous body visible in the sky especially at night. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. Fusion happens when lighter elements are forced to become heavier elements. [1] The nearest star to Earth is the Sun. Jul 15, 2014 · Stars bring wonder to our night sky, but just what is a star, exactly? Find out how different types of stars produce light, heat, and heavy elements. Stars come in a variety of sizes and colors. Oct 27, 2025 · A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Nov 11, 2025 · The James Webb Space Telescope may have discovered Population III stars, the universe's first generation of stars. . A star is a luminous spheroid of plasma held together by self-gravity. Sep 26, 2022 · How are stars named? And what happens when they die? These star facts explain the science of the night sky. But there are different ways a star’s life can end, and its fate depends on how massive the star is. These large, swelling stars are known as red giants.