What is one complete trip of one object around another object?

What is a natural or artificial object in space that circles around another object?

What is the appearance of the shape of the Moon at a particular time?

What is the regular rise and fall of the water level along a shoreline?

What is the blocking of the Sun's light that happens when Earth passes through the Moon's shadow?

What is a situation that occurs when Earth, the Sun, and the Moon are in a straight line and Earth's shadow falls across the moon?

What is one of many small, rocky objects between Mars and Jupiter?

What is a chunk of rock from space that travels through Earth's atmosphere?

What is a mixture of ice, frozen gases, rock, and dust left over from the formation of the solar system?

What is an object in space that produces its own energy, including heat and light?

What is the distance light travels in a year?

What are patterns that are formed by a group of stars in the night sky?

What is a huge cloud of gas and dust in space that is the first stage of star formation?

What is a star that can no longer turn helium into carbon? Iit cools and shrinks, becoming very small and dense.

What is a star that has produced more energy than gravity can hold together has exploded?

What is an object whose gravity is so strong that light cannot escape it?