About 907 Kilograms
It varies, but it is several tons per cubic centimeter - i.e., millions of times as dense as water.
A neutron star has slightly more mass than a white dwarf. This results in higher gravitational attraction. As a result, in a white dwarf, the star's mass (roughly the mass of the Sun - may vary in different white dwarves) has a diameter of a few thousand kilometers, and a density of a few tonnes per cubic centimeter. The neutron star, on the other hand, has a diameter of only 20-30 kilometers, and a density of millions of tonnes per cubic centimeter. For comparison, water has a density of 1 gram per cubic centimeter, other substances around us have similar densities; so the density of a white dwarf is millions of times the density of water, while a neutron star has billions of times the density of water.
A white dwarf has approximately the mass of our Sun, in a volume that's about a million times smaller - so it has a very high density (some tonnes per cubic centimeter). It's also very hot. Since energy production has stopped, they will cool down over time, but not enough time has elapsed for that to happen yet - in other words, the existing white dwarves are still very hot.
White dwarves have run out of fuel; therefore they have stopped producing energy, through nuclear fusion. Also, they are very small - smaller than planet Earth, while (for comparison) our Sun has 109 times the diameter of Earth; they are very dense (a cubic centimeter of white dwarf matter has a mass of several tons), and fairly hot - though, since they don't produce energy, they will gradually cool down.
millions of times grater
It varies, but it is several tons per cubic centimeter - i.e., millions of times as dense as water.
A neutron star has slightly more mass than a white dwarf. This results in higher gravitational attraction. As a result, in a white dwarf, the star's mass (roughly the mass of the Sun - may vary in different white dwarves) has a diameter of a few thousand kilometers, and a density of a few tonnes per cubic centimeter. The neutron star, on the other hand, has a diameter of only 20-30 kilometers, and a density of millions of tonnes per cubic centimeter. For comparison, water has a density of 1 gram per cubic centimeter, other substances around us have similar densities; so the density of a white dwarf is millions of times the density of water, while a neutron star has billions of times the density of water.
precisely 6 feet tall and 1 quarter centimeter
white dwarf
A brown dwarf.A brown dwarf.A brown dwarf.A brown dwarf.
A white dwarf has approximately the mass of our Sun, in a volume that's about a million times smaller - so it has a very high density (some tonnes per cubic centimeter). It's also very hot. Since energy production has stopped, they will cool down over time, but not enough time has elapsed for that to happen yet - in other words, the existing white dwarves are still very hot.
a few tons.
White dwarves have run out of fuel; therefore they have stopped producing energy, through nuclear fusion. Also, they are very small - smaller than planet Earth, while (for comparison) our Sun has 109 times the diameter of Earth; they are very dense (a cubic centimeter of white dwarf matter has a mass of several tons), and fairly hot - though, since they don't produce energy, they will gradually cool down.
millions of times grater
A teaspoon (5ml) of white dwarf material would weigh about 6,500,000 grams or just over 7 metric tons.
When the mass exceeds the Chandrasekhar limit.
So far most dwarf planets are found in a ring of icy debris beyond the orbit of Neptune known as the "Kuiper Belt." Only one dwarf planet is recognized in the belt of dry material between Mars and Jupiter known as the asteroids. That dwarf is called Ceres.