A collection of million and billions of stars around a common center is called a

What celestial body has the greatest influence on our tides

How long does it take for the Earth to revolve around the sun?

What is the relationship between mass and gravity

What causes the changing of the seasons?

A solar eclipse is most likely to occur when the

The color of the coolest star is

In a star life cycle, the name given to a ball of gas that has not begun to produce light is a

The earth rotates once every

The universe of shrinking

The universe includes all matter and energy

Our galaxy is part of a group of galaxies called the

What's the best explanation that science has about how the universe started?

What is the next closet star to our Sun?

Main sequence is the balance between FUSION and GRAVITY

The brightness of a star can be measured with absolute magnitude or_______________?

The Sun makes up about ____% of the Solar System's mass?

________is the comment center of mass around which 2 or more bodies revolve

_______is the measure of how an object's orbit differs from a perfect circle

__________is loose, remaining material on the surface of a planet or moon

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