Moons
Planets
Concepts
History
Theories
100
This moon of Jupiter once hosted running liquids and may feature an ocean under its icy surface.
What is Europa?
100
This planet is enshrouded by clouds composed of concentrated sulphuric acid.
What is Venus?
100
This concept argues that a near-light-speed traveler will age more slowly than someone left on Earth.
What is time dilation?
100
He was the first to see the rings of Saturn.
Who is Christiaan Huygens?
100
This theory of Einstein's proposes that nothing can exceed the speed of light.
What is the Special Theory of Relativity?
200
This moon of Saturn is covered with clouds and was visited by the Huygens probe of the Cassini spacecraft in 2006.
What is Titan?
200
This planet's swirling red storm is estimated to be more than one million years old.
What is Jupiter?
200
This concept posits that tears in the fabric of spacetime may enable "short cuts" to different parts and times of the universe.
What is a wormhole or Einstein-Rosen Bridge?
200
He proposed an equation to estimate the probability of intelligent life forms in the Milky Way Galaxy.
Who is Frank Drake?
200
This theory argues that gravity is a property of spacetime.
What is the General Theory of Relativity?
300
This moon of Mars is shaped like a potato rather than a sphere.
What is Phobos?
300
This planet is no longer officially a planet.
What is Pluto?
300
This concept argues that space travel across vast distances may be possible within a lifetime if the human body is frozen for most of the journey.
What is cryogenic freezing?
300
He was persecuted by the Roman-Catholic Church for arguing that the Earth revolves around the sun (heliocentrism).
Who is Galileo?
300
Contrary to Einstein's ideas, this theory argues that the universe is not entirely predictable.
What is the theory of quantum physics?
400
This moon of Jupiter has more volcano activity than any celestial body in our solar system
What is Io?
400
This planet has the shortest day in our solar system.
What is Mercury?
400
This is the process of engineering the climate of a planet.
What is terraforming?
400
Using a unique experiment, he accurately calculated the circumference of the Earth ca. 200 BCE.
Who was Eratosthenes?
400
This theory posits that more than one universe may exist.
What is the theory of the multiverse?
500
This moon of Uranus is the most damaged and scarred.
What is Miranda?
500
According to our current knowledge, this planet is the most likely to be capable of supporting human colonization.
What is Mars?
500
This is an experimental facility in Arizona designed to test proposed artificial living-environment shelters on colonized worlds.
What is Biosphere 2?
500
He researched the elliptical orbits of the planets around the sun.
Who is Kepler?
500
This theory states that there is physical possibility that causes may, under certain conditions, precede effects.
What is retrocausality?
M
e
n
u