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The Sun’s photosphere is, by mass, about 75%

Which of the following planets has the most moons?

All planets in our solar system __________ counterclockwise around the Sun while each also __________ on its own axis.

The heliosphere is defined as the volume of space over which the ______________ extends.

Six trillion miles is equivalent in distance to one ______________.

Spring tides occur close to the time of ______________ moon.

In 2006, the International Astronomical Union (IAU) introduced a new classification for small solar-system bodies that are not satellites but orbit the Sun called __________, and placed Pluto, along with several other such bodies, in that category.

Ocean __________ are due to the gravitational attraction that the Sun and Moon, mainly the Moon, exert on the Earth.

According to the _______________ theory, the primordial nebula contracted under the influence of its own gravity, began rotating, and then flattened into a swirling disk of gas and dust setting the stage for the formation of our solar system.

Which planet is known for its rings?