What would happen if we replaced the sun with a white dwarf?

The sun as a white dwarf When the sun is a white dwarf, most of the solar system will still be around. Mercury, Venus and Earth will be gone, but Mars, Jupiter, Saturn, Uranus and Neptune will survive and continue to go around the sun. So will the asteroid belt, Kuiper belt and dwarf planets like Pluto.

What if the sun was replaced with a red dwarf?

Red dwarfs stars are smaller and cooler than our relatively average star, the Sun. We think that many red dwarf star systems may have habitable, Earth-like planets that orbit them but replacing our Sun with a red dwarf would be rather disruptive to our Solar System and home planet.

What if the Sun doubled in size?

If you mean that it expands to twice its size, the drop in density would cause the fusion reaction that powers the sun to stop. The sun would then begin to collapse under its own weight, until it reached its former density, at which point it would re-ignite.

What would happen if the Sun doubled in size?

If the sun became twice as massive as it is today, would it affect our weight on earth? A: If the sun’s mass were to double without pushing or pulling on the Earth, then the Earth’s orbit will change to an ellipse which brings it out to our current radius but spends most of its time closer to the sun.

What happens if the mass of a white dwarf reaches its limit?

Suppose that a white dwarf is gaining mass through accretion in a binary system. What happens if the mass someday reaches the 1.4 solar mass limit? The white dwarf will collapse in size, becoming a neutron star.

What happens to a white dwarf star when it collapses?

The white dwarf will collapse in size, becoming a neutron star. The white dwarf will collapse to become a black hole. The white dwarf will undergo a nova explosion.

What would happen to Earth if our Sun was replaced by black hole?

Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar mass). What would happen to Earth in its orbit? Earth would almost instantly be sucked into oblivion in the black hole.

What is the source of pressure in white dwarfs and neutron stars?

Electron degeneracy pressure is the main source of pressure in white dwarfs, while neutron degeneracy pressure is the main source of pressure in neutron stars. Which of these isolated neutron stars must have had a binary companion?