What are the basic structures in which objects are grouped together in space?

this can be a lot of things, depending on how much gravity they produce. if there is a lot of gravity they could create a galaxy, star, or planet. if there is still lots of gravity, but not as much they could create a comet, asteroid, or dwarf planet. it all depends. Bu it can also be to do with what you mean by basic structures, and what the objects are.

rock can create asteroids, planets and parts of galaxies, gas, dust, ice and other things may create the rest and contribute to the other things.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: