Humanity has built some incredibly destructive weapons. There are still roughly 12,000 nuclear warheads on Earth today, capable of causing catastrophic damage to human civilization.But compared to the scale of planets, even our most powerful weapons are surprisingly small.From Mercury to Neptune, here’s what scientists believe would happen if nuclear bombs were detonated across the Solar System.Mercury: A Silent Planet Sized ExplosionMercury may be the smallest planet in the Solar System, but detonating a nuclear weapon there would look very different from an explosion on Earth. Mercury has virtually no atmosphere, which means there would be no mushroom cloud and no traditional shockwave.Instead, roughly 80 percent of the bomb’s energy would be released as intense X rays and gamma rays, instantly vaporizing the planet’s rocky surface.Because Mercury has a massive iron core, seismic vibrations would travel efficiently through the planet. A 50 megaton blast similar to the Soviet Union’s Tsar Bomba could cause Mercury to vibrate like a bell for hours.Those seismic waves could eventually collide on the opposite side of the planet, potentially triggering landslides and launching debris into space.Venus: A Planet That Could Smother a Nuclear BlastVenus is the complete opposite of Mercury.Its atmosphere is incredibly dense, with surface pressure roughly 92 times greater than Earth’s. That pressure is comparable to being nearly 920 meters underwater. A nuclear explosion on Venus would behave similarly to an underwater detonation. The atmosphere would heavily compress the blast, dramatically limiting its destructive reach.Venus AtmosphereThe planet is already extremely hot, so even large nuclear weapons would do little to change global temperatures. Its thick cloud cover would also hide most of the explosion from view, leaving only a brief flash visible from space.In short, Venus would largely absorb the blast.The Moon: A Bright Flash in Earth’s SkyMoon has no atmosphere, making nuclear explosions there similar to those on Mercury. There would be no sound, no mushroom cloud, and no atmospheric shockwave. Instead, radiation would vaporize lunar material and launch massive amounts of dust and rock into space.The explosion could trigger moonquakes that ripple across the lunar surface for hours. Scientists have actually intentionally detonated explosives on the Moon before. During the Apollo missions, astronauts launched small explosive charges as part of seismic experiments.In the 1950s, the U.S. military also explored the idea of detonating a nuclear bomb on the Moon as a Cold War demonstration. Had it happened at night, people on Earth might have seen a bright flash briefly shining in the sky.Earth: The Planet We Already NukedEarth is the only planet where nuclear weapons have actually been used. The atomic bombings of Hiroshima and Nagasaki killed more than 100,000 people. Beyond warfare, humans have detonated more than 2,000 nuclear weapons during testing programs.One of the largest was Tsar Bomba, a 50 megaton explosion that remains the most powerful nuclear test ever conducted. The United States also detonated Operation Starfish Prime in space, which disrupted electrical systems in Hawaii. If every nuclear weapon on Earth exploded at once, it would devastate civilization and trigger global environmental collapse.But the planet itself would survive. Scientists estimate it would take billions upon billions of far larger bombs to physically destroy Earth.Mars: A Terraforming DisasterMars has occasionally been mentioned in discussions about future terraforming. Some proposals suggested detonating nuclear weapons near its polar ice caps to release carbon dioxide and warm the planet. However, experts believe this would likely fail.The explosions would kick enormous amounts of dust into the atmosphere, blocking sunlight and creating a nuclear winter effect. Mars could become even colder than it already is. The blasts could also destroy valuable scientific evidence hidden in the planet’s ancient ice deposits. And potentially damage robotic explorers currently operating there.Jupiter: The Planet That Barely NoticesJupiter is so massive that Earth’s entire nuclear arsenal would barely affect it. If all 12,000 nuclear weapons were detonated in Jupiter’s atmosphere, they would create a temporary hot bubble before quickly being swallowed by the planet’s enormous storms.Jupiter has no solid surface, so there would be no traditional ground impact. Destroying Jupiter would require an unimaginable amount of energy. Scientists estimate it could take roughly 100 quadrillion times Earth’s total nuclear arsenal to completely blow the gas giant apart.We have already seen massive impacts on Jupiter.In 1994, Comet Shoemaker Levy 9 impact on Jupiter slammed into the planet with energy equivalent to hundreds of millions of atomic bombs. Jupiter survived with little more than temporary scars in its atmosphere.Saturn: Temporary Damage to the RingsSaturn would react similarly to Jupiter.Its atmosphere would absorb most nuclear blasts. Its famous rings, however, could temporarily be disrupted.A detonation inside the rings could vaporize ice particles and create a visible gap. But Saturn’s ring system constantly shifts and reorganizes itself. The damage would likely disappear within days.Uranus: Nuclear Powered Diamond StormsUranus has methane rich layers deep in its atmosphere. Scientists believe a powerful nuclear detonation could potentially break apart methane molecules and create carbon under extreme pressure. That carbon could theoretically form diamonds.The result might be localized radioactive diamond storms deep within the planet.Neptune: More Diamond RainNeptune would likely react in a similar way. Its deep atmosphere could compress nuclear blasts while increasing the possibility of diamond formation.Despite the dramatic visuals, the planet itself would barely be affected.Pluto and the SunPluto would react somewhat like Mercury. Its frozen surface would vaporize, creating a short lived cloud of debris. Sun is even less vulnerable.The Sun already releases vastly more energy every second than any nuclear weapon humans have ever created. A bomb detonated there would be insignificant.Why Planets Are Tougher Than We ThinkNuclear weapons are devastating to life on Earth. But on a planetary scale, they are surprisingly weak. The Solar System’s planets are enormous, resilient worlds shaped by forces far beyond human technology.Ironically, if scientists ever needed to use nuclear weapons in space, the most realistic target would not be a planet at all. It would be an asteroid or comet threatening Earth.