By studying distant galaxies in the 1920s, hubble made the following important discovery that led us to conclude that the universe is expanding: ) all galaxies were born at the same time, and all will die at the same time. b) all galaxies contain billions of stars, and all galaxies have spiral shapes. c) all galaxies outside the local group are moving away from us, and the farther away they are, the faster they're going. d) all galaxies outside the local group are orbiting the local group. e) all galaxies outside the local group are moving away from us, and all are moving away at nearly the same speed.

insects!

explanation:

measure their densities same density, same sub

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.