(Physics only) Distinguish the universe from a galaxy.

Physics Only Distinguish The Universe From A Galaxy (65cbda) is revised through physics, only and distinguish. The exact objective is: (Physics only) Distinguish the universe from a galaxy. In Red-shift, begin with the named situation from Galaxies, universe expansion and cosmology, then use the anchor vocabulary physics, only, distinguish, universe, galaxy to keep the explanation distinct. If the task is a calculation, show the relationship, substitution, arithmetic and unit; if it is descriptive, identify the process and the physical consequence. This route is different from nearby objectives because it focuses on universe, galaxy and comparison, not a general Physics summary. Exam answers should finish by checking the boundary term and explaining why this objective uses those words.