protogalaxy

Stars develop inside a protogalaxy when clouds of gas mix and collide.

Cold dark matter - objects with a free-streaming length much smaller than a protogalaxy.

Warm dark matter - particles with a free-streaming length similar to a protogalaxy.

Spiral galaxies occur when the stars inside the protogalaxy arise at different intervals.

The hydrogen then fell toward the center of the protogalaxy while the dark matter remained as an outer halo surrounding it.

The term protogalaxy was mainly used in the Big Bang Theory.

ProtoGalaxy received generally positive reviews from critics.

As an indie game, ProtoGalaxy struggled to compete with big-business video games.

Brown stated that ProtoGalaxy "has a simple old-school look which people have said deceptively hides the depth the game offers".

The gas between developing stars continues to collapse and the resulting gravitational differences manhandle the protogalaxy's stars, dust and gas.

While ProtoGalaxy is primarily an adventure game, it incorporates elements of other gaming genres, such as arcade, shooter, puzzle, and role-playing games.

In physical cosmology, a protogalaxy, which could also be called a "primeval galaxy", is a cloud of gas which is forming into a galaxy.

The flow would stall if the rate of deposition of mechanical energy into the infalling gas was large enough to unbind the protogalaxy in one crossing time.

Unlike traditional space arcade shooters in which there is a preset number of hit points, ProtoGalaxy employs a health bar that tracks the damage incurred by a player's ship.

If the stars in a protogalaxy form all at once, then the mature galaxy essentially retains the spherical shape of the protogalaxy and becomes an elliptical galaxy.