Answer:
Our galaxy consist of a large, nearly flat external star system with a central sun, all surrounded by a vast halo of hot gases. the disk of the milky way is about 100,000 light years in the diameter and very thick. We refer to the dust and gas that resides in our galaxy as nebula. From our location, we cannot see far into the disk with human eyes because our view is blocked by longer distance of the speed of light.
Step-by-step explanation: