The Universe
The age of the universe.
What is 13.8 billion years old?
The elements that the Sun is made of.
What are helium and hydrogen?
The smallest planet in our solar system.
What is Mercury?
This is where the asteroid belt is found.
What is in between the inner and outer planets?
OR
What is in between Mars and Jupiter?
Left-over pieces of rock that did not clump together to form a planet.
What is an asteroid?
The galaxy we live in.
What is the Milky Way Galaxy?
The Sun's phase where it gains size, but reduces in temperature. At this point (billions of years from now), it will engulf Mercury, Venus, and possibly Earth.
What is the Red Giant?
The planets that have rings.
What are Jupiter, Saturn, Uranus, Neptune?
OR
What are the outer planets?
The region of the solar system beyond the orbit of Neptune that contains comets, asteroids, and dwarf planets.
What is the Kuiper Belt?
Moving "space rocks" that are made of dust and rock particles mixed with frozen water, methane, and ammonia.
What are comets?
The space between solar systems.
What is interstellar space?
The distance from a star that allows liquid water to be on its surface (if the conditions are right).
What is the habitable zone?
OR
What is the goldilocks zone?
This planet has a runaway greenhouse effect, which makes it the hottest planet in our solar system.
What is Venus?
This dwarf planet is located in the Kuiper Belt and used to be the smallest and coldest planet in our solar system.
What is Pluto?
When Earth passes through a large amount of meteoroids, many small particles of rock and dust enter the atmosphere and this occurs.
What is a meteor shower?
Any planet that is found outside of our solar system.
What is an exoplanet?
The percentage of the solar system's total mass that the Sun makes up.
What is 99.86%?
The reason Mars is red.
What is rust?
The relationship between Pluto and its largest moon, Charon.
What are binary dwarf planets?
Part of a meteor that makes it to Earth’s surface.
What is a meteorite?
Clouds of gas, ice, and dust (space junk) that form when giant stars explode, which eventually give rise to other stars.
What are nebulae?
This is the state of matter that the Sun is always in.
What is plasma?
These moons help give Saturn's rings their structure.
What are shepherd moons?
The group of astronomers that created the following criteria for a celestial body to be considered a planet:
Must orbit a star.
Must have a spherical shape.
Must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.
Who is the International Astronomical Union?
This famous "space rock" orbits the Sun at 122,000 mph and passes Earth every 76 years.
What is Halley's Comet?