Gravity Free

Which inner planets have almost the same size, mass, and density?

The law that describes how a planet orbits the sun is called the

A rotating cloud of gas and dust from which our solar system formed

About 99% of all matter that was contained in the solar nebula now composes the

Which of the following planets has the most complex rings

The satellite that orbited Venus

A planet whose atmosphere may contain a large amount of methane

The least dense planet in the solar system is

An astronomer who proposed a heliocentric model of the solar system

A small planet that is farthest from the sun; and is not considered a gas giant

Which of the following planets experiences a runaway greenhouse effect

Which of the following planets do scientists NOT consider a major planet?

Neptune's great dark spot is a(n)

Planets Characterized by solid rock with metallic cores, zero to two moons, and impact craters

Small bodies that orbit planets are called

Which planet has volcanic regions that may still be active

The right combination of temperature, water, and oxygen

the process that caused early Earth to form three distinct layers

Mar's volcanoes are larger than those of Earth because Mars

Known for its rings and bands, the least dense planet is?