Solar-type Stars
What is a solar-type star?
Solar-type stars are the least restricted category here they are similar to the Sun in mass and evolutionary state.
What are hot blue stars?
Hot blue stars are called extreme horizontal branch stars and can be hotter than main-sequence stars of the same luminosity.
What are red dwarf stars?
A red dwarf is the smallest and coolest kind of star on the main sequence
What are white dwarf stars?
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter.
What are black holes?
A black hole is a region of spacetime where gravity is so strong that nothing.
How many solar-type stars are there?
200 billion and 400 billion stars in the Milky Way galaxy.
Why are blue stars so hot?
How do red dwarf stars burn?
Their low temperature also means that they burn through their supply of hydrogen less rapidly.
What are white dwarfs made of?
Primarily carbon and oxygen, with traces of other elements.
What happens if you go into a black hole?
No matter what type of black hole you fall into, you're ultimately going to get torn apart by the extreme gravity
How common are solar type stars?
Approximately 10% of stars.
How do hot blue stars form?
Once all the helium in the core has been used up, the core cools again and the star undergoes a second contraction.
Why do red dwarf stars live so long?
Red dwarf stars are much cooler and less massive than the Sun, and are expected to live much longer lives because they do not burn through their fuel as fast
Why is a white dwarf is very hot?
When a low mass star dies by shedding its envelope leaving behind the core as a white dwarf, it is very hot at around 100 million degrees.
What is a black hole made of?
Which star type is most like the Sun?
Tau Ceti is the closest single star that has the same spectral classification as our Sun.
This young open cluster is dominated by a sprinkling of brilliant blue stars but also contains a few contrasting red giant stars.
What happens when a red dwarf star dies?
When the red dwarf finally runs out of fuel completely, it becomes a white dwarf.
What causes a white dwarf to collapse?
If a white dwarf were to exceed the Chandrasekhar limit, and nuclear reactions did not take place, the pressure exerted by electrons would no longer be able to balance the force of gravity.
How does a black hole give off light?
Its extreme gravity warps space around it, which allows light to echo bending around the back of the object.
How are solar type stars formed?
Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars.
How long do blue stars last?
What process happens in red dwarf stars that help them live so long?
This process brings fresh hydrogen into the core of the star where it can continue the fusion process.
Who discovered the first white dwarf?
Astronomer Friedrich Bessel.
How long does it take to make a black hole?
It takes about 50 million to 100 million years.