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What is the science definition of white dwarf?
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains.
What is a white dwarf in simple words?
White dwarfs are stars that have burned up all of the hydrogen they once used as nuclear fuel. Fusion in a star’s core produces heat and outward pressure, but this pressure is kept in balance by the inward push of gravity generated by a star’s mass.
What is an example of a white dwarf?
Theoretically, white dwarfs cannot exceed 1.4 solar masses, some examples of white dwarf stars are Sirius B, Procyon B, or Van Maanen. The nearest known white dwarf to us is Sirius B, at a distance of 8.6 light-years away. The term “white dwarf” was first coined by astronomer Willem Luyten in 1922.
How do you use the word dwarf in a sentence?
Dwarf in a Sentence 🔉
- Without a step stool, it was difficult for the dwarf to get anything done around the cabin.
- Each dwarf took a keen liking to Snow White.
- Although he was small, the dwarf could use magic to solve most of his problems.
- The tiny dwarf worked in the coal mine all day.
Is the sun a white dwarf?
Like the vast majority of stars in our Milky Way galaxy, the sun will eventually collapse into a white dwarf, an exotic object about 200,000 times denser than Earth. “The sun itself will become a crystal white dwarf in about 10 billion years.”
Why white dwarf is white?
The white dot in the center of this nebula is a white dwarf; it’s lighting up the receding cloud of gas that once made up the star. They are the stellar cores left behind after a star has exhausted its fuel supply and blown its bulk of gas and dust into space.
Can a white dwarf support life?
However, the accumulation of greenhouse gases in the atmosphere of a white dwarf could extend its habitability. Any life that exists on these objects may thrive on a planet orbiting a white dwarf because the planet’s retention of greenhouse gases would keep it warm long after the star corpse lost most of its heat.
How is angelic used in a sentence?
Angelic sentence example. She is an angelic being! You wake up on the beach, with the almost angelic Ann standing over you. It looked as tho she was on another planet, but there was something quite angelic about her as well.
What are white dwarf kids?
A white dwarf is a compact star. Their matter is squashed together. The mass of a white dwarf is similar to the mass of the Sun, but its volume is similar to that of the Earth. White dwarfs are the final evolutionary state of all stars whose mass is not high enough to become a neutron star.
How does a red dwarf form?
Red dwarfs form like other main-sequence stars. First, a cloud of dust and gas is drawn together by gravity and begins rotating. The material then clumps at the center, and when it reaches the critical temperature, fusion begins. The low temperatures of red dwarfs mean they are far, far dimmer than stars like the sun.