Oxygen makes up about what percent of the Earth's atmosphere?

Earth'g gravity pulls

The sun is a

The huge explosion that astronomers think was the birth of the universe

An optical telescope that uses convex lenses to gather and focus light

streak of light produced when a meteoroid enters Earth's atmosphere

center of the sun

eruptions that occur when the loops in sunspots regions suddenly connect

objects that orbits the sun, is spherical but has not cleared the area of its orbit

speed in a given direction

the force of gravity on an object

the tendency of an object to resist change in motion

push or pull

attraction of all objects toward each other

line passing through Earth's center and poles

path of the Earth as it revolves around the Sun

movement around the sun

movement of Earth around its axis

group of stars that people imagine to represent a figure of objects

object that orbits the sun, is large enough to have been rounded by its gravity, and has cleared the area of its orbit

what are the first four moon phases in order?

What are the last moon phases in order?