White Dwarf?
[2006-04-07 21:48:07]

Q: What is the approximate diameter of a white dwarf star with the Sun's mass?

A: White dwarf stars are about the same size as the Earth with the odd property that the more massive ones should be smaller than the less massive ones. A white dwarf with 1 solar mass would be slighty smaller than the earth, but not significantly so.

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white dwarf ?
[2008-10-05 04:13:31]
Snow White Upper View

why does phuto turn into white dwarf.


For most of its history since its discovery, Pluto was considered a planet, just like all the other planets in the Solar System. But in 2005, astronomer Mike Brown from Caltech shocked the world with the discovery of a new object named 2003 UB313 which

Solar System's Death Glimpsed in White Dwarf Stars

The sun is about 4.57 billion years old and should survive another 5 billion years or so in its current state. After that it will run low on its hydrogen fuel, the fusion of which presently pushes away gas that would otherwise gather at its core. As the gas accumulates, rising pressure will fuse heavier helium atoms into carbon, drastically increasing the star’s core temperature.

That final blaze that will push away its outer gas shells, turning it into a red giant star. Its surface will extend roughly to the orbit of Earth.

“When this happens in our own solar system, billions of years from now, the Sun will engulf the inner planets Mercury and Venus,” Gänsicke said in the release. “It’s unclear whether the Earth will also be swallowed up by the Sun in its red giant phase — but even if it survives, its surface will be roasted.”

Astronomy & Space »

Suppose that a white dwarf is gaining mass through accretion in a binary system. What happens if the mass some?
[2010-07-05 08:19:00]
Snow White Tree

A)The white dwarf will collapse to become a black hole.
B)The white dwarf will collapse in size, becoming a neutron star.
C)The white dwarf will explode completely as a white dwarf supernova.
D)The white dwarf will undergo a nova


Half of the question is missing here. Anyway, if the mass of the dwarf becomes larger than about 1.4 solar masses, the Chandrasekhar mass, the answer is

C)The white dwarf will explode completely as a white dwarf supernova.

Astronomy & Space »

What is the difference between the brightest, hottest white dwarf and the faintest, coolest white dwarf?
[2009-06-21 19:39:37]
Snow White Close Up

The white dwarfs in this group of stars have a range of colors and luminosities. What might be the difference between the brightest, hottest white dwarf and the faintest, coolest white dwarf?

I've searched through my book, but it doesn't


Well a white dwarf happens after a star has exploded (supernova) and is dying and cooling down. So I would think that the brightest hottest ones are the ones that are closer to the time they exploded. But original star size would have something to do

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