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Earth Compare to Jupiter |
Speculative Jovian Life |
What If
What if explorers found life inside Jupiter, Saturn or Neptune? Or what if those gigantic exoplanets recently discovered by the Hubble Space Telescope or the James Webb Space Telescope turn out to host life?
“Impossible,” you may say.
“Not so fast,” another may say.
But not Life as We Know It
Conventional wisdom assumes life would most likely occur on an Earth-like planet. Such a planet must have temperatures similar to Earth’s and most importantly host liquid water. But would life have to be similar to Earth’s?
On a gas giant planet, such as Jupiter, there is no liquid water or soil. Sunlight would be too weak for the photosynthesis which dominates on our planet.
Could a Jupiter life form extract energy from lightning within the atmosphere? Could the organisms extract Jupiter’s water vapor from the air?
What did Steven Hawking and Carl Sagan, famous scientists, have to say about life existing within a gas giant? Spoiler alert: They didn’t reject the possibility.
But Why Haven’t We Detected Life on Jupiter?
Indeed, if creatures do exist in Jupiter, how would we see them inhabiting the depths of Jupiter’s atmosphere? Could we ultimately detect them in the far future, with advancements in space craft technology?
Yet, one of Sagan’s speculations involved whale like creatures inhabiting closer to the surface. Surely we might have seen them by now?
Or could we?
Consider that an astronaut in the ISS can only see objects on Earth larger than 112 meters in diameter. An astronaut couldn’t see a surfacing blue whale whose length might reach 30 meters.
But could astronauts take pictures of ocean ships?
Alright, what about extremely humungous whales on Jupiter?
Our closest images of Jupiter come from the Juno flyby. Consider that over 1300 Earths could fit inside Jupiter. Whales a hundred times larger than those on Earth would still not be visible. See also https://www.universetoday.com/articles/how-much-bigger-is-jupiter-than-earth.
So far, our best resolution of Jupiter is 1300 kilometers.
Maybe if the whales are over 1300 kilometers in diameter, we might see one if we’re lucky!
What about Carbon?
Life as we know it uses carbon as a key component. Is there a source of carbon in Jupiter?
There are traces of methane and ammonia in Jupiter’s atmosphere . Both of these molecules contain carbon.
Could Jupiter Sinker Creatures Exist?
Other than whale-like creatures, Sagan also mentioned sinkers could exist. Sinkers fall to their doom in the dense and hot lower atmosphere, but produce tiny offspring that would be pushed into the relative safety of the upper atmosphere by swirling currents.
However Sagan stated could. This doesn’t mean sinker type creatures do exist. Nevertheless, science fiction writers could employ sinker-type creatures in their stories about Jupiter. Right?
And there are other gas giants in our solar system. These are Saturn, Neptune and Uranus. Perhaps life could exist there for the similar reasons as for Jupiter?
What if We Never Find Gas-Planet Life in our Solar System?
In the future, assuming space exploration proceeds, we could explore all the planets of our solar system in depth. Only then, can we know whether life exists in any of the other solar-system planets—besides Earth.
And if we don’t find this life, this does not rule out the possibility of life in gas giants beyond our solar system. Consider planet PSR J2322−2650 b located about 750 light years from Earth. This planet has a mass of nearly 80% of Jupiter’s, but otherwise is a particularly weird planet.
Or life could exist on HD 209458 b, a planet some 157 light years away? Studies undertaken by using the Hubble Space Telescope have revealed the planet to be similar to Jupiter.
Read on.
More on the Feasibility of Gas-Planet Life
https://futurism.com/life-on-gas-giants
https://www.watchmojo.com/articles/is-there-life-inside-the-gas-giants-unveiled
Or this:
Final Word
Remember these are speculations, albeit scientifically plausible. Until science finds evidence about such life being impossible, science fiction writers may employ such life in their stories.
Peter Spasov. Last updated Friday January 16, 2026
