Rocky Planets
This planet is the coldest of all the rocky planets.
Mars
The most complex and prominent rings in the solar system belong to this planet.
Saturn
Upon its discovery, this dwarf planet was initially hailed as the Ninth Planet.
Pluto
Launched in October 1957, this space probe was the first man-made object to orbit the Earth
Sputnik 1
This is the closest moon to the Sun.
The Moon
This planet has more rovers than all others in the solar system combined.
Earth
This planet contains more mass than all the others in the solar system combined
Jupiter
This belt of icy objects is where most of the largest dwarf planets are found.
Kuiper Belt
This space probe, famously recovered by Mark Watney for communication purposes in The Martian, was the first to release a rover onto the Martian surface
Pathfinder
This largest moon of Saturn is the only moon in the solar system to possess a dense atmosphere.
Titan
This planet has a reputation for quickly destroying all probes sent to its surface.
Venus
The second most complex and prominent rings in the solar system, and the second to be discovered, belong to this planet.
Uranus
This space probe became the first to visit a dwarf planet in March of 2015
Dawn
A nuclear test in August 1957 launched this object upwards at tremendous speed, and assuming it didn't burn up in the atmosphere, possibly became the first man-made object to escape the Earth's gravity entirely.
Manhole cover / Sewer cover
This moon of Jupiter, the second most distant of the Galilean moons, is the only one to maintain a magnetic field.
Ganymede
This planet possesses the largest temperature range in the solar system
Mercury
All gas and ice giants in our solar system reside beyond this imaginary temperature-defined line.
Frost Line / Snow Line
This dwarf planet was the first to be discovered, and was found before the planet Neptune.
Ceres
This NASA space probe executed the first successful mission on the Martian surface
Viking 1 / Viking
Known for its retrograde orbit, this moon is the most massive of its kind in the outer solar system.
Triton
The planet Mars frequently passes close to this bright red star, which has a name originating from Greek meaning "Rival of Mars".
Antares
This planet was the first to have its position predicted by use of mathematics prior to first being observed.
Neptune
With its discovery, this dwarf planet, the most massive of its kind, ignited significant strife in the astronomical community which ultimately led to the creation of the dwarf planet category in 2006
Eris
This model of rocket, during a test in 1944, became the first man-made object to cross the Karman line and officially enter into outer space
V-2
This oft-forgotten moon is the most massive in orbit around the planet Uranus.
Titania