Voc
The spinning of a planet or moon on its axis.
What is Rotation?
A small body of ice, dust, and rock that orbits the sun and forms a glowing tail when near it.
What is a comet?
The time of year when day and night are nearly equal in length everywhere on Earth.
What is Equinox?
The force that pulls objects toward each other.
What is Gravity?
The tendency of an object to resist changes in its motion.
What is Inertia?
The changing appearance of the Moon as seen from Earth.
What is Phase?
The curved path an object follows as it moves around another object in space.
What is Orbit?
A large, round object that orbits a star and has cleared its orbital path of other debris.
What is Planet?
An imaginary line that runs through the center of a planet from the North Pole to the South Pole.
What is Axis?
A large, round object that orbits a star and has cleared its orbital path of other debris.
What is a planet?
The time of year when the Sun is farthest north or south of the equator, causing the longest or shortest day.
What is Solstice?
A model of the solar system that places Earth at the center.
What is Geocentric?
A group of stars that form a recognizable pattern in the sky.
What is Constellation?
A model of the solar system that places the Sun at the center.
What is Heliocentric?
The vast, seemingly endless area that exists beyond Earth’s atmosphere, where there is very little air or matter. It contains stars, planets, moons, comets, asteroids, and galaxies. Space is sometimes called the “universe” or “outer space.”
What is Space?
The lighter, outer part of a shadow during an eclipse.
What is Penumbra?
A giant ball of hot gas that emits light and heat from nuclear reactions.
What is Star?
An oval-shaped path that planets follow around the Sun.
What is a Ellipse?
The movement of one object around another in space, such as Earth orbiting the Sun.
What is Revolution?
The collection of the Sun and all the objects that orbit around it, including the eight planets, their moons, dwarf planets, asteroids, comets, and other space debris, all held together by the Sun’s gravity.
What is the Solar System?
A natural or artificial object that orbits another object in space
What is Satellite?
The darkest part of a shadow during an eclipse.
What is Umbra?
The blocking of light when one celestial body moves into the shadow of another.
What is an Eclipse?
A streak of light produced when a meteoroid burns up in Earth’s atmosphere.
What is Meteor?
Newton’s law stating that all objects in the universe attract each other through gravitational force.
What is Law of Universal Gravitation?