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what are two units that astronomers use to measure distances in space?

identify a situation in which each unit of measurement would be most appropriate to use.

Astronomers measure things in space using light-years because there is not relative way to actually measure things in space. Which makes measuring anything in space extremely time consuming and hard work. I hope this helped. I didnt use Google and this is all from my brain. Please give me Brainliest!

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.