The Sun
The distance from the Sun to the Earth is measured as one of these.
What is an Astronomical Unit?
This planet third from the Sun is unique in that it can support life.
What is Earth?
Named for the Roman God of the Sea, this planet's unique blue color is very eye-catching.
What is Neptune?
This next closest star to the Sun is 4.2 light years away.
What is Proxima Centari?
This "small" star is a super-heated core of fused Carbon with no atmosphere.
What is a White Dwarf?
This process which powers the Sun changes Hydrogen into Helium.
What is Nuclear Fusion?
This planet closest to the Sun is the only one in our solar system that lacks an atmosphere
What is Mercury?
This planet, known for its extensive ring system, is the sixth planet from the Sun.
What is Saturn?
This point in an objects' orbit is the point where it is the closest distance to the Sun.
What is the Perihelion?
This element fused in the core of a red supergiant is the most abundant metal in our universe.
What is Iron?
This layer of the Sun's atmosphere is the visible layer that we can see from our telescopes.
What is the Photosphere?
This planet is known for its reddish color due to the large amounts of Iron-oxide in the soil
What is Mars?
The large red-spot of this planet is actually a continuous storm system that has been raging for hundreds of years.
What is Jupiter?
This spiral galaxy is theorized to collide with the Milky Way sometime in the next few million years.
What is the Andromeda Galaxy?
This celestial object forms when a massive star dies and allows no light to escape its center.
What is a Black Hole?
These massive expulsions of solar gas have been known to disable radio signals on Earth.
What are Coronal Mass Ejections?
This planet named for the Roman Goddess of Beauty has a period of rotation longer than its period of revolution.
What is Venus?
The prominent feature of this planet is the unusual axial tilt, not to mention its name.
What is Uranus?
This formula for the potential existence of life on other planets is named for the astronomer who developed it.
What is the Drake Equation?
This collection of fused particles is one of the heaviest objects in our universe and forms from condensed neutral particles.
What is a Neutron Star?
These solar ejections can travel great distances and are responsible for our auroras.
What are Solar Winds?
A unique feature of Mars is its this mountain, which dwarfs the Earth mountain that it is named for.
What is Olympus Mons?
This donut-shaped ring of asteroids marks the outer edge of our solar system.
What is the Kuiper Belt?
This comet passes Earth every 75 years and is known as a short-period comet by astronomers.
What is Halley's Comet?
This theoretical substance makes up 73% of the physical universe.
What is Dark Energy?