Home Page Make Me A Star!
Evolve a star.
Evolve and relax your star.
Star Garden.
Evolve and relax two stars.
Stellar Smash!
Collide two stars.

Starsmasher 1.0

Collect Data on Collisions already run.

Evolve a star: Starsmasher 1.0

Set the initial mass and age of a star then let it evolve! In the centers of stars, it ishot enough that elements can bind together in a process called fusion. Fusion creates heavier elements andreleases energy, ultimately causing the star to shine. Old stars die when they run out of elementsto fuse together. Over its lifespan the inside of a star changes, and here we follow these changeswith a version of the TWINS stellar evolution code.

Relax a star, or two: Relax one star. Relax two stars.

Smoothed Particle Hydrodynamics codes model a star as a ball of fluid and break it up into little overlapping droplets, or SPH particles. You set the number N of particles that you star is broken up into. Larger N values yield better resolution, but take longer to finish relaxing. When the star is initially generated, the forces of pressure and gravity are not precisely balanced. Relaxing the star puts the star in equillibrium so that it can later be collided in a separate SPH calculation.

Collide two stars: Stellar Smash

Gravity can pull stars together. As two stars approach one another, they speed up as gravitational potential energy is converted into kinetic energy. The strength of gravity increases as the distance between the stars decreases, and tidal forces can cause the stars to bulge. Depending on the the structure of the two stars and their orbital trajectory, a few things might happen, including (i) merger into a larger star, (ii)fly-by, (iii) complete destruction, and (iv) tidal capture. For more background information on the role of gravity in star collisions, see the animation below.