While there is much debate over which exoplanet discovery is considered the “first,” one stands out from the rest. In 1995, scientists discovered 51 Pegasi b, forever changing the way we see the universe and our place in it. The exoplanet is about half the mass of Jupiter, with a seemingly impossible, star-hugging orbit of only 4.2 Earth days. Not only was it the first planet confirmed to orbit a sun-like star, it also ushered in a whole new class of planets called Hot Jupiters: hot, massive planets orbiting closer to their stars than Mercury. Today, powerful observatories like NASA’s Kepler space telescope will continue the hunt of distant planets.

Delgado:
Saturn’s moon Enceladus is all about the plumes erupting from its south pole. At our first brainstorming session, someone called the plumes “Cold Faithful,” and that helped crystallize this idea quite quickly.

There’s no right way up in space, so for fun, we turned the surface upside down from the point of view of the visitors in the picture.

Harris:
This was the first poster we designed in the series. The concept was really clear from the very beginning and set the tone for everything that came after. When we showed it to the scientists, the only thing they wanted us to tweak was to make the color of one of the stars (and the shadow it casts) different from the other star.

Harris:
The concept here was about how plants might be very different colors on planets around other stars, since the star’s spectrum of light would be different. So we played on an old saying, with “the grass is always redder on the other side of the fence.”

There’s whimsy in the design, making people wonder why there would be this white picket fence on an alien planet.

Delgado:
The big sign in this poster is inspired by the gateway in Reno that announces it as “the biggest little city in the world.” We kind of thought that might suit Ceres. It’s the biggest object in the asteroid belt between Mars and Jupiter and probably has a lot of water ice underground.

Harris:
We designed all of these posters as a group, and liked the way this looked with a very muted color palette.

There’s no place like home. Warm, wet and with an atmosphere that’s just right, Earth is the only place we know of with life – and lots of it. JPL’s Earth science missions monitor our home planet and how it’s changing so it can continue to provide a safe haven as we reach deeper into the cosmos.

Astonishing geology and the potential to host the conditions for simple life make Jupiter’s moon Europa a fascinating destination for future exploration. Beneath its icy surface, Europa is believed to conceal a global ocean of salty liquid water twice the volume of Earth’s oceans. Tugging and flexing from Jupiter’s gravity generates enough heat to keep the ocean from freezing. On Earth, wherever we find water, we find life. What will NASA’s Europa mission find when it heads for this intriguing moon in the 2020s

Delgado:
The basis for this poster was a Jupiter cloudscape by artist Ron Miller, who was very gracious in allowing us to modify his painting. In talking with a lead scientist on NASA’s Juno mission (which is getting to Jupiter in July), we locked onto his description of the brilliant auroras Jupiter has. It would truly be a sight to see.

Harris:
This design fell right out of the tagline, “where the nightlife never ends,” which was perfect for a wandering planet that has no star.

We wanted to evoke a sense of elegance, so we leaned heavily on 1930s art deco for this one. It’s sort of retro-future fantasy, but again, there’s a bit of real science inspiring it.

Delgado:
The Grand Tour is the route the Voyager 2 spacecraft took to visit all four outer planets. We imagined this would be something people might want to repeat, since it’s a flight plan that’s possible every 175 years or so, when the outer planets are arranged just right. In the future, it might be considered “quaint” to experience a gravity assist.

Harris:
Style-wise, the design came from some references we looked at from transparency overlays from the 1960s. It initially had a black background, but we inverted it and the design just clicked.

Delgado:
This was the very last poster we produced for the series. We wanted to imagine a future time where humans are on Mars, and their history would revere the robotic pioneers that came first.

There are a few fun things to point out here. You can see the silhouette of Olympus Mons in the background, there’s a hint of underground water, and the rover’s wheel is spelling out JPL on the ground in Morse code, just like the Curiosity rover does (for what the rover drivers call “visual odometry.”)

Delgado:
As we discussed ideas for a poster about super Earths — bigger planets, more massive, with more gravity — we asked, “Why would that be a cool place to visit?”

We saw an ad for people jumping off mountains in the Alps wearing squirrel suits, and it hit us that this could be a planet for thrill-seekers.

Frigid and alien, yet similar to our own planet billions of years ago, Saturn’s largest moon, Titan, has a thick atmosphere, organic-rich chemistry and a surface shaped by rivers and lakes of liquid ethane and methane. Cold winds sculpt vast regions of hydrocarbon-rich dunes. There may even be cryovolcanoes of cold liquid water. NASA’s Cassini orbiter was designed to peer through Titan’s perpetual haze and unravel the mysteries of this planet-like moon.

Harris:
We tried a few different designs for Venus, starting with the surface, but the intent was to show things people might find pleasant, and Venus’ surface is anything but.

Kim:
The scene is of a city in the clouds during a transit of Mercury across the sun. The Morse code for the number 9 is written on the side (signifying the inhabitants are “on cloud 9”).