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What event marks the birth of stars?
fusion of hydrogen atoms into helium atoms
What event marks a birth of a star?
fusion of hydrogen atoms into helium atoms
The onset of which event marks the change of a protostar into a star?
the nuclear fusion of hydrogen into helium
The onset of which event marks the change of a protostar into a star-?
The nuclear fusion of hydrogen into helium
What happens in the core that marks the birth of a star?
Nuclear fusion, converting hydrogen nuclei into helium nuclei.
What happen in the core that marks the birth of a star?
Nuclear fusion, converting hydrogen nuclei into helium nuclei.
What event marks the birth of a star?
fusion of hydrogen atoms into helium atoms
What does a star become when it casts off hydrogen and helium gases in its outer layers?
When a star exhausts its hydrogen and helium in the outer layers, it can become a red giant and eventually shed those outer layers, leading to the formation of a planetary nebula. The core that remains can become a white dwarf, which is a dense, hot remnant that will gradually cool over time. This process marks the later stages of stellar evolution for medium-sized stars.
Stellar in a sentence?
Stellar means exceptionally good or outstanding. An example of how to use it in a sentence is the contestant received stellar marks across the board.
What is helium flash?
A helium flash occurs because the core of the star is in what is known as a "degenerate" state. This means that the core has contracted so much that the pressure of the electron shells of the atoms making up the core prevent the core from contracting further. Under normal gas conditions (i.e. NOT a degenerate state), an increase in the temperature of the core would cause an increase in core pressure resulting in the core expanding and the temperature then dropping. This state is known as hydrostatic equilibrium. With a degenerate core, the temperature increases but the pressure doesn't. This extra energy ignites the helium creating run-away nuclear reactions. This is what is referred to as a "helium flash."
Why is the sun or the star eventually die?
A star eventually uses up all of it's hydrogen in nuclear fusion. They fusion of hydrogen into helium is what makes the star glow bright and hot. When all the helium is fused, the star collapses inward on itself, and becomes a small "white dwarf" star, essentially a pile of "stellar embers". That's the end of a star's life.
What do you call a star out of gas?
Technically, they never run out of gas. A process called fusion combines huge amounts of hydrogen to make helium. When all of the hydrogen runs out, fusion takes place on the helium and the star rapidly increases in size.
