Websites at the scale of your ambition.
RenX Web Solutions brings design, content and technology together around what your business needs to achieve. The result can take many forms. This one begins with Jupiter.
Every website we build is shaped around the business it serves. It might need to generate leads and sales, establish trust or help customers complete complex tasks. Sometimes, its job is to tell a story.
For example, a science museum might want to make a distant subject feel immediate. What follows is one way we might answer that brief: the story of Jupiter and its moon Io, more than half a billion kilometres from Earth, told through observations from Voyager 1, Galileo, Juno and the James Webb Space Telescope.
The giant
One planet, thirteen hundred Earths.
The largest planet in the solar system. The strongest planetary magnetic field. A storm that has turned for centuries, with more than a hundred known moons caught in its pull.
The moon
And then there is Io.
Io circles Jupiter every forty-two hours. The moon gave RenX’s AI agent her name. Meet her on the RenX AI Solutions page. She is usually laser-focused on her work. Ask her about Jupiter, the solar system or almost anything in the night sky and she may get a little carried away.
The fire
The most volcanically active world in the solar system.
Hundreds of volcanoes cover Io. Their plumes have risen hundreds of kilometres, while fresh deposits continually erase the impact craters on its surface.
Voyager · 1979
Someone checked a navigation frame.
In a navigation image taken three days after the flyby, JPL engineer Linda Morabito found a plume on Io’s edge. It was the first active volcano found beyond Earth, spotted by someone looking for something else.
Galileo · 1995–2003
Voyager found the plume. Galileo mapped the world.
Galileo spent almost eight years orbiting Jupiter. Its main antenna never opened, so images came home slowly through a smaller one. Those images now form the map wrapped around Io on this page, showing a surface remade by eruption after eruption.
What drives the fire
Jupiter keeps Io burning.
Jupiter’s gravity, sharpened by the timed pulls of Europa and Ganymede, flexes Io by as much as a hundred metres. The friction heats its interior. Io’s volcanism is the price of the orbit it keeps.
Juno · 2016–2025
Juno measured Io’s flex.
During two close flybys, Io’s gravity changed Juno’s speed by a tiny amount. That change revealed how much the moon flexes. The result suggests a mostly solid interior, not a shallow ocean of magma around the globe.
The mark
Io leaves a footprint in Jupiter’s aurora.
Charged particles from Io follow Jupiter’s magnetic field and light a distinct auroral footprint near the pole. Earth’s Moon leaves no such mark. Io is wired into Jupiter, and the connection glows.
James Webb · 2026
And then something cold, inside the bright spot.
In 2026, Katie Knowles, Henrik Melin, Tom Stallard and colleagues found a cooler patch inside Io’s glowing footprint. It was about 265°C, while the glow around it reached 493°C. Only one of five James Webb observations captured it. The researchers suggest several possible explanations, but none is yet definitive. For now, its cause remains unknown.