Table of Contents
- 1 What happens during the helium flash?
- 2 What is the helium flash and why does it occur in some stars but not others?
- 3 Which is more common a star blows up as a supernova or a star forms a planetary nebula white dwarf system quizlet?
- 4 Which of these elements was made in a supernova explosion?
- 5 Which is more common a star blows up as a supernova or?
What happens during the helium flash?
During the helium flash, a star’s degenerate core is heated so intensely that it finally “vaporizes”, so to speak. That is, individual nuclei begin moving so fast that they can “boil away” and escape it. The core reverts back into a (spectacularly dense) normal gas, and powerfully expands.
What causes helium flash?
What is the helium flash and what causes it? the explosive ignition of helium fusion in the core of a giant star. It is caused by the ignition of helium fusion in the star’s core.
What is the helium flash and why does it occur in some stars but not others?
The helium flash is the onset of runaway helium burning in the core of a low-mass star (such as the Sun). The helium flash happens in the hydrogen-exhausted core of a star that has become a red giant.
Why do stars like the sun go through a helium flash?
Large stars burn so hot that they can reach the temperature of helium fusion before the core starts to turn electron-degenerate. Thus, helium burning in large stars takes place in normal matter that can expand and cool as the helium burns, so they do not experience the run-away “flash” that the Sun will.
Which is more common a star blows up as a supernova or a star forms a planetary nebula white dwarf system quizlet?
Which is more common: a star blows up as a supernova, or a star forms a planetary nebula/white dwarf system? Supernovae are more common. They both occur in about equal numbers.
Can the sun ever burn out?
For about a billion years, the sun will burn as a red giant. Then, the hydrogen in that outer core will deplete, leaving an abundance of helium. Astronomers estimate that the sun has about 7 billion to 8 billion years left before it sputters out and dies.
Which of these elements was made in a supernova explosion?
During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as uranium and gold, to be produced.
What made Supernova 1987A so useful?
What made supernova 1987a so useful to study? We saw direct evidence of nickel to iron decay in its light curve. In the Large Magellanic Cloud, we already knew its distance. Its progenitor had been observed previously.
Which is more common a star blows up as a supernova or?
Which is more common: a star blows up as a supernova, or a star forms a planetary nebula/white dwarf system? Planetary nebula formation is more common.