Web Results

Star - Wikipedia


A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth .... Cecilia Payne-Gaposchkin first proposed that stars were made primarily of hydrogen and helium i...

What are stars made of?


Our nearest star, the Sun, is so hot that the huge amount of hydrogen is undergoing a constant star-wide nuclear reaction, like in a hydrogen bomb. Even though ...

NASA - A Star Is a Big Ball of Gas


Apr 2, 2008 ... What is a star? A star is a big ball of gas. It is not star-shaped. Stars give off heat and light. How is a star made? Stars are born in nebulas.

What are stars made of? | Cool Cosmos


Most stars have small amounts of heavier elements like carbon, nitrogen, oxygen and iron, which were created by stars that existed before them. After a star runs ...

What is a star? - Sky & Telescope


Jul 15, 2014 ... A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the ...

Are we really all made of stardust?| Explore | physics.org


It sounds like a line from a poem, but there is some solid science behind this statement too: almost every element on Earth was formed at the heart of a star.

What are Stars Made Of? - Universe Today


Dec 24, 2015 ... You might not be surprised to know that stars are made of the same stuff as the rest of the ... In other words, the entire Universe was like a star.

How is a star born? - Scientific American


A star is born when atoms of light elements are squeezed under enough ... Interstellar matter, that found lying between the stars, is made from gas and dust.

How do we know what the stars are made of? - Smithsonian ...


Astronomers read the color patterns in starlight to determine the elements present in the star. Behind The Science · How do we know that the stars create the ...

How much of the human body is made up of ... - Physics Central


All of these things are made of various molecules and atoms. ... As a star ages, it then fuses the helium with hydrogen to form lithium which has three protons in ...