Because we live in an expanding universe, distant galaxies are farther away from us today than they were when the light we see from them started on its journey to us. so what do we mean when we say that a galaxy is 7 billion light-years away?

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel