NASA's Juno Probe Reveals Extreme Heat Beneath Io's Volcanic Surface

In the outer reaches of our solar system, Jupiter's moon Io endures a kind of gravitational intimacy with its giant host that transforms the moon's very interior into a furnace. NASA's Juno spacecraft has now measured the extreme subsurface temperatures this tidal kneading produces, offering humanity its first concrete data on the heat engine driving Io's ceaseless volcanic fury. The discovery matters not only as a portrait of one tormented world, but as a key to understanding how gravitational forces might quietly warm hidden oceans on distant, seemingly frozen moons — and whether life might