Category Archives: Extraterrestrial

Life within Gas Giants

Jupiter compared to Earth
Speculatife Jovian Life

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:

https://www.livescience.com/space/exoplanets/a-real-life-pandora-newfound-disappearing-planet-in-our-neighboring-star-system-could-have-a-habitable-moon-just-like-the-avatar-movies

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

Robot and Extraterrestrial Pronouns

R2-D2 Droid

Captain Picard when he was a Borg

How would you address R2-D2? By Lucasfilm – R2-D2 – StarWars.com Encyclopedia, Fair use, https://en.wikipedia.org/w/index.php?curid=38400151

A he/him/his or it/it/its?

Is Your Robot a She, He or It?

What if your robot, named R2-D2, raises human children after landing on an alien planet? Would you write the following?

  • R2-D2 raised her children. She raised them well, for which they thanked her.
  • R2-D2 raised his children. He raised them well, for which they thanked him.
  • R2-D2 raised its children. It raised them well, for which they thanked it.
  • R2-D2 raised ser children. Se raised them well, for which they thanked sem.

What’s up with the last example?

I made up the ser possessive pronoun, along with the subject and object versions.

If R2-D2 is a sentient entity akin to humans, might sentient robots deserve the dignity of having pronouns reserved for them? Should there be a pronoun valid for any sentient creature? This could be any self-aware being such as: demon, fairy, extraterrestrial, advanced robot, and us.

It could apply to hybrids such as a robot-human-octopus.

Let your mind reign free.

What is a Personal Pronoun?

Most people will refer to another person by her, him, or them.

Like other pronouns, personal pronouns are used in place of nouns to allow us to speak and write more concisely. Personal pronouns change form based on the grammar rules for them.

Pronouns are a key to how others may identify someone. How pronouns are used depends on inclusive language across cultures.

Different languages use pronouns differently from English speakers.

These are the rules and practice for regular writing. If you are writing speculative fiction, you may need to use pronouns for non-human characters, possibly some who are neither female nor male. Some speculative fiction has accomplished this in effective ways. 

For instance, Becky Chamber’s A Psalm for the Wild-Built covers issues of personhood and gender identity. In speculative fiction, writers can tackle both; personhood and gender identity.

What is a Person?

I believe we can agree a raccoon is not a person. Similarly we would also agree a coffee mug is not a person. The raccoon, although living, is not a human. The coffee mug is an inanimate object.

But what if your story involves both a sentient raccoon and a coffee mug equipped with sensors and a highly sophisticated alternate intelligence? (Must electronic intelligence be artificial?)

In a speculative setting the situation muddies. The question is: What is personhood?

Aha, dear reader, we are delving into the philosophical issues of what defines a person.

Personhood includes the ability of a being to recognize huself (I invented a pronoun) as a distinct entity. The concept includes agency, meaning the ability to make choices and act upon them. This combination implies the being expresses hu’s (another invented pronoun) autonomy to pursue goals and shape what hu (oops, another invention) does.

Think of a fully autonomous vehicle exploring the ocean inside an ice-covered moon. Could such a vehicle be a person?

In a nutshell, a person is distinct and has agency. Then what about gender?

Genderless Pronouns

On Earth, much life is either female or male. Some, such as some flowers, include both. Some other languages have built-in rules for genderless pronouns. Could English speakers borrow Farsi’s u (او) for she or he?

There are some proposed English alternatives.

Robots are generally entities built from electromechanical parts and electronics. Hence robots do not need gender, although you could endow one with gender. More on that later.

As for organic extraterrestrials, would one necessarily expect them to be female or male?

Must ETs have gender?

Could organic extraterrestrials have exotic genders of your own invention?  Could your Oooga-oogalog reproduce using a five-some mating ritual?  Sure, it’s your story. But would this be fantasy or science fiction? Could life have plausibly evolved elsewhere to employ such a means of reproduction?

Let’s consider why life on Earth has gender. In a nutshell, blame parasites.

Could you world-build the ecology where parasites didn’t evolve to exist? Would your extraterrestrial sapiens reasonably be androgynous? Would sexual asymmetry be necessary?

Evolutionary science has much to say on this topic. Although asexual reproduction is possible, two genders appear to be simplest means for random chance to have evolved the most optimal means of reproduction.

World-building Your ETs

You will need to consider the extent of your world-building skills such as considering these questions.  Furthermore, consider these factors.

Perhaps you can invent a science-based possibility for life evolving in a non-Earth environment? This would require lots of effort. Plus you would have to orient your reader to a setting—without loads of info dumping. Are you up to this challenge?

Myself, I’ll stick to the more Earth-like scenarios.

Plausibly, advanced ETs would have recreated their own robotics or equivalent. Perhaps these ET robots have usurped their masters. Perhaps these robots created their own organic creatures employing a five-some mating ritual? One never knows. By taking evolution out of equation, Bob’s your uncle—or an ET equivalent you invent for the expression.

You could also invent genderless ETs, whereby robots combine with organics. Oops, someone already has.

How the Borg Reproduce?

The Borg doesn’t reproduce. Famously, they assimilate!

They are cybernetic organisms (cyborgs) linked in a hive mind called “The Collective”. The Borg co-opted the technology and knowledge of other alien species to the Collective through the process of “assimilation”: forcibly transforming individual beings into “drones” by injecting nanoprobes (see my post on nanites) into their bodies and surgically augmenting them with cybernetic components.

After assimilation, a drone’s race and gender become “irrelevant”. 

Gender identity for The Borg is more nuanced than simply irrelevant. The Star Trek Borgs later included a Borg Queen, among other developments. Nevertheless, I’ll return back to robots.

Should one endow a robot with gender?

What if you create a robotic spouse, akin to the Pygmalion legend? In this case, create your robot to include gender features, and voila, love could be in the air.

Gendering robotic bodies can be important in some stories, even robots inherently need no genders. The reader can judge for herself or himself whether these stories are effective.

Already, real-life robots are endowed with gender .

Summary

Finally, check out: Do aliens have gender?

Bear in mind, to make these possibilities plausible, your alien race should have achieved technological intelligence prior. Then your aliens could have self-engineered themselves to employ some of the exotic possibilities described in the link.

However, their rationale for doing this remains up to you.

Peter Spasov. Last updated Monday December 15, 2025

Invisibility Answers the Fermi Paradox

Enrico Fermi
Invisibility Cloak

Enrico Fermi asked, “Where is everybody?”

A nearly functional invisibility cloak.

What is the Fermi Paradox?

What if we haven’t yet encountered any extraterrestrials because they wear invisibility cloaks?

This question sort of answers: What is the Fermi paradox?

Once upon a time some physicists met around the table. Maybe they reminisced about developing the world’s first atomic bombs. According to some Enrico Fermi asked, “Where is everybody?”

They knew Fermi referred to extraterrestrials.

What makes this a Paradox?

We know life exists on Earth. Science explains why. Many scientists have suggested extraterrestrials could exist elsewhere in our galaxy. Why not? Estimates suggest our Milk Way has anywhere from one hundred billion to four hundred billion stars. According to NASA, our galaxy contains at least one hundred billion planets.

Recent discoveries suggest our Milky Way has at least three-hundred million Earth-like planets. If life only evolved on one out of a million of these planets, three hundred planets in the Milky Way would bear life.

Could some of this life have developed into a technological civilization? If so, then why haven’t we yet seen signs of them? This is the essence of the Fermi paradox.

But haven’t we already found Signs of Aliens?

Do some ancient structures, such as the Egyptian pyramids, prove that advanced extraterrestrials must have assisted our ancestors to build them? In brief, ancient structures don’t ‘prove’ extraterrestrial visitors were responsible. However, these speculative theories do make a good story. And writers should be free to speculate.

Maybe I’ll explore related topics in a future post, such as what is scientific proof and so on.

Has Earth already received Alien Visitors?

Aside from the preceding section, there are stories about UFOs and other suggestions such as ancient stories. I’ll repeat my mantra. Perhaps this will be a future topic.

Yet I’ll say this. A good writer could invent a good story from the possibilities.

Does Life have to be Earth-like?

We don’t know for sure. Some scientists have speculated on possibilities. For now I won’t delve further into this question. Perhaps a future post will cover the question.

If Earth-like conditions weren’t required, this would increase the likelihood of other life in the Milky Way. For instance, there could be alternate biochemistries. Again, if this life could evolve into a technological civilization, why haven’t we yet detected signs of them?

How likely is it for Life to Evolve into a Technological Civilization?

This is a good question. Perhaps I will explore this in a future post. For a hint, consider the Drake Equation. So far, the numerical values of its factors are speculative.

Other Questions

How could we detect extraterrestrial life beyond our solar system? How could we detect non-terrestrial technological civilizations? For example, spectroscopic measurements of an exoplanet may show gases which could only be produced by industrialization. Or we detect radio signals with complex patterns which repeat occasionally, as would be the case with our own radio transmissions.

If found, decoding the signals could be challenging. Extraterrestrial radio would use different broadcast standards and the extraterrestrials would use different languages. Perhaps they write by tying knots. Such a technique could be akin to Inca quipu.

There are other possibilities which could be the subject of future postings.

Answers to the Fermi Paradox

The simplest answer is: Only Earth bears life, or only Earth hosts technological civilizations. But this answer wouldn’t be any fun, would it?

Speculative fiction demands a better answer. Let’s check out alternate explanations. These include:

            A. The civilizations have yet to develop a technology which people could detect from Earth. Civilizations wouldn’t all develop at the same time.  What if Earth happened to be the first civilization in the Milky Way to have sufficiently advanced technologically?

            B. All civilizations eventually collapse, meaning they no longer use a technology which humans could detect from Earth. Reasons for collapse could social upheaval, a massive nuclear war, environmental disaster and other reasons.

            C. Extraterrestrial civilizations don’t use a technology which we could currently detect. For instance, the extraterrestrials may communicate solely by thoughts and/or travel virtually by using ghost-like proxies. They may bioengineer other life forms to produce all the material goods they need. Perhaps the civilization is solely monastic. The citizens favor intellectual activities such as developing mathematical theorems which they choreograph with elaborate dances. They have no interest in the activities many humans enjoy doing. Let your imagination soar about how other civilizations may behave.

            D. Advanced cultures shirk technology entirely. The citizens have highly advanced minds which is sufficient for stimulating their psychological needs. They may consciously dream realistic worlds as a form of entertainment. Perhaps they have discovered how technology may complicate their lives unnecessarily. They have found happiness without requiring extra material goods beyond those required for survival. Physical travel doesn’t interest them.

            E. Extraterrestrial civilizations mistrust outsiders. Some humans also suggest we shouldn’t be advertising our presence to potential extraterrestrials. What if any extraterrestrial society more advanced than us would inevitably eliminate or colonize us. Don’t think that could happen? Our history of genocide and colonialism has shown otherwise.

Granted, the last possibility is a downer. The opposite could be true. Here goes.

F. Extraterrestrials, being smarter than us, tend to respect all other life forms. Such a civilization might prefer to quietly study others so as to not interfere with the society. This could be a more extreme form of Star Trek’s prime directive where any contact is forbidden.

Would Extraterrestrial Civilizations Tend to Hide from Others?

This is possible. See the preceding points E and F. Extraterrestrials of either type E or F would wish to remain invisible when visiting us. For this purpose they could wear invisibility cloaks.

But wait, aren’t invisibility cloaks just fantasy?

 Well … no. Invisibility cloaks could become real. Perhaps sooner than you think.

About Transparency

Generally, only transparent objects are invisible. The question becomes: How do we make a non-transparent object, invisible?

In principle, one could use cameras to record and project images of what’s behind an object onto the object’s surface, making it appear like it’s not even there. This technique generally wouldn’t be practical.

Becoming Invisible

The key to creating a true invisibility cloak may center around metamaterials. These are metal-dielectric composites engineered on the nanoscale. The composite structure acts as an array of artificial atoms, enabling electromagnetic radiation to pass freely around an object. The metamaterial guides light around the object it is coating to create the illusion that the object isn’t there at all.

One challenge up to the present date has been the inability of metamaterial-based cloaking to interact at frequencies, or wavelengths, within the visible light spectrum.

Could this challenge be overcome in the near future? Another issue is whether cloaking could be achieved over a broad spectrum of electromagnetic wavelengths. This may be possible, as this article suggests, albeit requiring heavy reading.

For yet more detail (and heavy reading), see “Invisibility and Cloaking: Origins, Present, and Future Perspectives”.

Conclusion

Even if cloaking can hide an object from human sight, sophisticated instruments might detect other effects which could reveal cloaking being used. Perfect cloaking appears impossible. But would it be good enough for concealment from a less advanced society?

In summary, could an advanced extraterrestrial civilization observe us invisibly? Perhaps.

Peter Spasov. Last updated Saturday November 08, 2025

Being ET

What If One Could Experience Being ET?

Much science fiction is about intelligent extraterrestrials. Through these stories readers can experience the wonder of interacting with creatures thoroughly foreign to us. They could be creatures who may not be humanoid, animal or even share none of our biochemistry. But what would it be like to immerse oneself into the mindset of these alien creatures? Can we imagine being a water-breathing scientist who encounters the first humans in the ocean world of Europa, one of the moons of Jupiter? Long ago, as a youth, I had read such a story but cannot remember where. From what I recall, the story was written (mostly) in the point of view of an alien scientist living in an underwater world. My recollection is weak, alas. The story haunts me because this alien dissected some human visitors, considering the humans as specimens for scientific curiosity. I suspect that was the story’s point. To other beings, might we humans be to them like lab mice or bacterial specimens were to us?  Be aware that since the story was written, ethics and animal rights usually became a necessary requirement for research.

In my experimental writing, I riffed on something akin to that story. I tried to put myself in the mindset of a hypothetical plant-like creature which lived on Proxima Centauri b, a true-life potentially Earth-like planet in orbit around Proxima Centauri. Proxima Centauri, a red dwarf star, is Earth’s second-closest star at about 4.2 light years away. Need I say the Sun is Earth’s closest star? Currently our knowledge of the planet is limited. According to one artist the planet’s surface could be this:

An artist’s representation of the surface of Proxima Centauri b (as seen by a human!)
Credit: ESO/M. Kornmesser (https://www.eso.org/public/images/eso1629a/)

In my imagination, the native inhabitant was similar to terrestrial mosses but with additional organic systems for optical sensing and had a brain plus nervous system equivalent. The point is how would the being narrate its world view to us human readers? This being would have no prior knowledge of Earth and its humans. In my case, I wrote in English but by restricting the words to mostly botanical terms. Sometimes, I employed some generic terms in addition to the botanical. And I experimented too with varying subject-verb-object ordering for its version of dialogue. All said, I can’t claim my method worked well enough for publication. Could a typical human understand and enjoy the work? As an aside, the story concept originated from combining two prompts: I have a pulse – and – root bound. These prompts led me to consider: What if a botanical creature could have a pulse?

You might ask, how do established and published writers write in the point of view of aliens? To me, it seems, they stick to settings closer to human than I attempted.

One example is Ursula K. Le Guin’s The Word for World Is Forest.

Unfortunately I hadn’t read this one, but would like to one day. Hence I’ll depend on the Wikipedia description. The story takes place on a fictional planet colonized by humans. Two of the main characters are human. The third however, is a native of the alien planet. Le Guin wrote part of the novel in the point of view of Selver, the native from the planet. From the plot synopsis I surmise Selver had already assimilated some human culture, hence he can narrate in terms for humans to follow. Wikipedia itself states, Le Guin wrote from an omniscient point of view for her Selver chapters. The novel explores themes of language, communication, dreaming, consciousness, colonialism and ecology, among others. For instance, for Selver, “forest” and “world” are synonyms. So too, is “dream” and “root”. Selver and the natives generally view humans as an insane people.

All in all, sounds like a great novel with effective world building, but for getting into an alien’s head, I’m not sure.  There is another example; Children of Time by Adrian Tchaikovsky, a novel I had read about a year prior to writing this post.

This story too is set on a fictitious exoplanet similar to Earth, one which humans populated with terrestrial animals long ago. In the story, a species of spiders had since evolved into having human-like intelligence, and initially being unaware of the prior existence of humans on Earth. However, initially unknown to the spiders, descendants of humans orbit the planet in a space station. The story also spans thousands of years, primarily for covering the evolution of the spiders, and featuring several spider characters. During the chapters about the spiders, Tchaikovsky writes in the third person point of view. After meeting the humans, the spiders refer to them as star creatures. There is an AI which has directed their evolution, which the spiders refer to as the Messenger. Being more intelligent variants of terrestrial spiders, the reader has sufficient context to understand the spider behavior. Generally the spiders think similarly to humans but due to their evolutionary origin have a more female dominant society. Over time, the relationships veer closer to equality.

Did Tchaikovsky cheat on his portrayal of the spiders? Were they too human in mindset? Look, I don’t blame him for this. Can anybody, by definition, sufficiently portray the alien? Furthermore, can such person do it in a manner for the rest of us to understand? Is this a stretch too far for writers?  I don’t believe so. If and until actual extraterrestrials are encountered, we can be imaginative, to immerse ourselves into very foreign worlds. Creative speculation about evolution under unusual conditions can guide us.

Finally, for a more philosophical examination, I will refer to an academic paper that has gained some fame, “What Is It Like to Be a Bat?” written by Thomas Nagel. A bit of a heavy read, I’ll attempt to summarize it as plainly as I can.  Philosophers have struggled with something called the Mind-Body problem, generally meaning whether they are separate or one controls the other. Confused? If one is sad, they cry. Does sadness occur because we cry? Or do we cry because we are sad? Aliens likely would evolve eyes or some equivalent. Such an organ would probably need to secrete liquid due to dust in the air. The current thinking is that evolution employed crying as a means to signal sadness. I’m simplifying. For some background on how emotions may have evolved check out Evolution of Emotion . Depending on how deep one may want to dive into this, this could inspire some thoughts for world building. Here is a link to Nagel’s paper in full.

Returning back to Nagel’s paper, he claims: An organism has conscious mental states if and only if there is something that it is like to be that organism – something that it is like for the organism. Okay, re-read the statement and try to unpack it. I believe it means an organism needs something to experience in order to be conscious. Nagel argues we can’t figure out the subjective experience of another being, such as a bat. We could imagine hanging upside down; we could imagine eating insects, and even echolocation to navigate around obstacles. But, Nagel’s point is that the bat’s internal experience may not be the same as how we imagine it. We can even extrapolate this to ourselves. When you experience anything, I can only assume how you actually experienced it. Similarly, you can only presume how I experience anything. This said, many philosophers challenge Nagel’s assertion.

Alright, how does this relate to experiencing being ET? I would say set your creativity free. Imagine possibilities. Regarding your imagined setting, ask yourself questions. If Grog the blob from planet Splot encounters your protagonist, would the she-he-combo (perhaps the being reproduces asexually) sense your protagonist’s presence from tiny variations of the electromagnetic field? Our bodies do generate bioelectromagnetic fields, albeit extremely tiny. Would Grog go into a mental breakdown due to the strange signal, never encountered before? Or would Grog have no consciousness at all? Perhaps the signal triggers an olfactory hallucination? There are many possibilities.

Peter Spasov. Last updated Monday February 24, 2025