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...
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
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.
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 ...
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 ...
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.
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.
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.
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
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 ...