Main sequence
What temperature and luminosity are main sequence stars?
Average temperature and luminosity.
What is a Red giant
The stage in a low mass star's life, after the star has used up all it's hydrogen, it starts to cool and expand in an effort to start fusing helium atoms. Helium is fusing into Carbon.
What is a Red super giant
The stage in a high mass star, it is very similar to the red giant but it expands faster, lasts longer, and gets bigger than the red giant. Helium is fusing into Carbon.
What is a White dwarf
The stage in a low mass stars life, the remains of the red giant is a glowing ball of gas about the size of earth. Nuclear fusion has stopped and the gas begins to cool.
Life cycle of an average sized star.
nebula, protostar, main sequence star, red giant, planetary nebula, white dwarf, black dwarf.
What is a main sequence star.
Hydrogen is fusing into Helium. The longest stage in a star's life.
What temperature and luminosity are Red Giants
Really bright,and cooler
What temperature and luminosity is Red Super Giants?
Really bright,and cooler
What tempeture and luminosity is white dwarfs
Really hot but dim.
What is a Neblua?
Cloud of gas and dust where stars are born
What will happen to the Sun when it dies?
When the Sun dies in about 5 billion years, it will run out of hydrogen fuel, swell into a red giant, and eventually collapse into a white dwarf.
Why do Red Giants get so big?
When the core runs out of hydrogen, nuclear fusion stops there, and gravity causes the core to contract and heat up. This intense heat ignites a shell of hydrogen around the core.
How hot is a red supergiant?
the surface temp of a red supergiant is about 3,500-4,500 kelvin.
How does a white dwarf form?
when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.
What is a Protostar
Gravity pulls gases and dust together and nuclear fusion starts
What elements are formed in a main sequence star?
Main sequence stars primarily form helium in their cores by fusing hydrogen atoms together.
Why are they red if they are hotter inside?
While the contracting core and burning shell are incredibly hot, the energy is spread across a vastly increased surface area.
How long do red supergiants live?
Most red supergiants live a few tens of millions of years (depending on the size)
What is its maximum mass?
<1.4 Msun
What is a Supernova
The stage in a high mass star's life, after the red super giant expands it collapses in its self so rapidly that when it is done it explodes outwards.
What is the Sun's nuclear fusion.
The Sun powers itself by fusing hydrogen atoms into helium in its core, which releases massive amounts of energy
Will our Sun become a Red Giant?
Yes. In about 5 billion years, the Sun will exhaust its core hydrogen and evolve into a red giant.
what is the mass of a red supergiant?
the mass of a red supergiant is about 8-12 the mass of our sun ( our sun's mass: 1.989 x 10^30 )
what size is a white dwarf
A typical white dwarf star is roughly the size of Earth (about 12,000 to 16,000 kilometers in diameter), despite having a mass comparable to that of the Sun.
Life cycle of a massive sized star.
nebula, protostar, main sequence star, red super giant, supernova, black hole or neutron star