” Even astronomers used to think little of intergalactic space.
At that speed, it will escape the galaxy's grasp and sail off into intergalactic space.
In terms of density, the voyage from interplanetary to intergalactic space is more drastic than going from water into air.
A needle dust as the model of the intergalactic dust is emploied, which is used to explain the reason why the supernova light tracks intergalactic space do not redden obviously.
As gas pools, it turns into stars, whose outflows and explosions push material back out into intergalactic space— a process of negative feedback.
