Which of the following statements is true?

the milky way galaxy does not move.
all galaxies are spiral in shape.
the hubble telescope has been used to study faraway stars and galaxies.
all of the above

Can i have some info on neptune's dark spot

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

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