An astronomer uses parallax to determine a star’s distance from Earth.
What is the stars closer to Earth will appear to have a greater shift in position.
The Milky Way is an example of what type of galaxy?
What is a spiral galaxy?
How does the earth stay in orbit around the sun instead of drifting away from it into outer space?
What is gradational force between the sun and earth
As astronomer observes an object in space that has an irregular shape, that orbits the sun in a highly elliptical orbit, and that is made of ice and rock.
What is a comet?
A cluster of stars that has no specific shape because it may have collided with another galaxy is called a/an
What is an irregular galaxy?
An astronaut drops a hammer on the Moon, and a scientist drops an identical hammer on Earth. Both hammers are dropped from the same height. The hammer dropped on Earth falls to the ground faster than the hammer dropped on the Moon. What are the reason(s) for this happening?
What is the gravitational attraction is stronger on earth than on the moon because earth has a large mass.

This is a model of the solar system that has limitations. What would be a limitation that you cannot see in this model?
What is gravitational force exerted by each planet
What is the name of a galaxy that has the shape of an ellipse?
What is an elliptical galaxy?
The solar system includes the Sun, planets, moons, and what other objects?
What are asteroids, meteoroids, and comets?
Ocean tides are caused by?
What is gravity, moon and sun

The dotted lines in the picture show orbital paths of objects. Object E is orbited by
What is object D?
What is the name of our galaxy?
What is the Milky Way?
A rock made of frozen gases and dust.
What is a comet?
the solar system was formed as a ________________ shaped cloud of dust held together by ____________
What is a disk and gravity
Early astronomers noticed that some stars in the sky appeared to move together across the sky as constellations. What is this motion that makes the stars appear to move across the sky?
What is earths rotation on its Axis?
What is the idea that the Sun is the center of the Solar System?
What is the heliocentric theory?
What are the outer planets are composed of?
What is gas?
How much bigger is the sun than the Earth?
What is 1,000,000 times?
What is the sun with planets and other objects that orbit around the star called?
What is the Solar System?