Gravity and the Solar System

Best answer: this ocean is part of what sphere of the Earth System?

The force which holds our solar system together is ___________________.

The distance that light can travel in one year is called a ___________________.

Galileo discovered the phases of _________, proving that it orbited the Sun.

The luminosity of a star is a measure of its _______________________.

The farthest point in a planet's orbit around the sun is called the __________.

Who created the first modern heliocentric model of the solar system?

The force of attraction between two objects based on their mass and distance is ___________.

Best answer needed: this city is part of what sphere of the Earth System?

The _______ model of our solar system is correct and puts the sun at the center.

Kepler's ____ Law of Planetary Motion says: orbital period squared = average distance cubed.

The _________________________ is our sun and all the planets and other bodies orbiting it.

The star has not yet formed in this picture of a young solar system. What is this called?

__________ proposed the first geocentric model of our solar system.

The hottest part of the Sun is the _______________.

In this picture, young planets called __________ are forming.

_________proposed a complicated "wheels on wheels" geocentric model which stood for 1400 years.

______ is the apparent shift in the position of an object when viewed from different locations.

Copernicus realized that the Earth's __________ caused day and night.

______________ is when someone else duplicates your experiment.

Which historical model of our solar system puts the Earth at the center?

The closest point in a planet's orbit around the sun is called the _____________.

Galileo was the first person to explore the universe with a ________________.

The variable which we change on purpose in an experiment, so we can test it, is the _________.

Kepler's First Law says that the orbits of planets are __________________.

The early astronomers were fooled by parallax and the __________ of the sun, moon and stars.

Our solar system formed in a stellar nursery called a ___________.

___________ force is a constant inward pull which makes a body follow a curved path.

Kepler's Second Law says that planets sweep out equal areas in equal amounts of _____.

__________ is when you repeat trials of an experiment again and again.