A star is a luminous spheroid of plasma held together by self-gravity. [1] The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth …

Dec 8, 2025 · Whether you're new to the STAR program or considering a switch to the STAR credit, review our resources for a complete overview.

Dec 20, 2025 · A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Of the tens of billions of trillions of stars in the observable universe, …

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.

A star is a giant ball of hot gas that can be compared to a huge engine – hydrogen is its primary fuel. Atoms in the core of stars join together in a physical reaction known as nuclear fusion, releasing …

Oct 22, 2025 · Yellow Dwarf Stars: Our sun is a yellow dwarf star, with a temperature of about 5,500 degrees Celsius. These stars are medium-sized and are in the middle of the temperature range.

A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. …

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 …

Apr 11, 2025 · 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.

Explore the mesmerizing world of stars, their life cycle from nebulae to black holes, different types like red giants and white dwarfs.