Can neutron stars eat other stars?

Neutron stars, the remnants of massive stars that have undergone supernova explosions, are incredibly dense and compact celestial objects. These stellar remnants possess incredibly strong gravitational forces, capable of exerting a powerful pull on surrounding objects, including other stars. This has led scientists to speculate whether neutron stars, with their immense gravitational pull, could potentially “eat” or consume other stars that come too close.

Despite the powerful gravitational attraction of neutron stars, the likelihood of them actually consuming other stars is incredibly low. The distances between stars in space are vast, and the chances of a neutron star coming close enough to another star to actually consume it are extremely rare. Additionally, the immense energy released during such an event would be catastrophic, likely resulting in a powerful burst of radiation and gravitational waves detectable by astronomers.

What Are Neutron Stars?

Neutron stars are fascinating and mysterious celestial objects that form from the remnants of massive stars after they explode in a powerful supernova. These incredibly dense objects are composed mostly of neutrons and possess a strong gravitational pull. They are incredibly small in size, with diameters typically measuring only about 10 kilometers. Despite their small size, neutron stars are incredibly heavy, with masses several times that of our Sun. The matter in a neutron star is packed so densely that a teaspoon of it would weigh billions of tons!

The Gravity of a Neutron Star

The gravity of a neutron star is mind-boggling. To put it into perspective, the gravitational force on the surface of a neutron star is approximately 2 billion times stronger than what we experience on Earth. This intense gravitational pull is a result of the star’s mass being crammed into such a compact space.

Can Neutron Stars Engage in Galactic Cannibalism?

Neutron stars have such immense gravitational pull that they can indeed interact with other celestial objects, including other stars. Whether or not they can actually “eat” other stars, however, is a complex question.


When a neutron star passes close to another star, its gravitational force can cause tidal disruption. The immense tidal forces exerted by the neutron star can tear the companion star apart, stretching it into thin strands of matter called “spaghettification.” This process transfers mass from the companion star to the neutron star, effectively “feeding” it.


Another way in which a neutron star can “eat” a companion star is through a process known as accretion. In an accretion process, the intense gravity of the neutron star pulls matter from the companion star into a disk-like structure called an accretion disk. This disk consists of superheated gas and dust spiraling towards the neutron star’s surface. The matter in the accretion disk is eventually pulled onto the neutron star’s surface, gradually increasing its mass.

Can Neutron Stars Completely Consume Other Stars?

While neutron stars can gain mass through tidal disruption and accretion, a neutron star consuming an entire star is unlikely. The immense gravitational forces involved in tearing a star apart or pulling matter onto the neutron star’s surface can disrupt the natural equilibrium of the system.

Additionally, the mass transfer process may not be efficient enough to allow a neutron star to fully consume a companion star. The rate at which matter is transferred from the companion star to the neutron star may not exceed the rate at which energy is radiated away from the system. This means that the neutron star may not be able to accumulate mass faster than it is losing energy, inhibiting its ability to consume the entire star.

While neutron stars can indeed interact with and gain mass from companion stars through processes such as tidal disruption and accretion, the complete consumption of a star by a neutron star is unlikely. The immense gravitational forces and the delicate balance of energy transfer in such systems make the complete devouring of a star a highly improbable event. Nevertheless, the study of neutron stars and their interactions with other celestial bodies continues to fascinate scientists and deepen our understanding of the universe.

While neutron stars are incredibly dense and powerful, they do not “eat” other stars in the same way a black hole does. However, neutron stars can still have significant interactions with other stars in a binary system, impacting their evolution and potentially leading to dramatic events like supernovae. The study of these interactions provides valuable insights into the dynamics of our universe.

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