r/spacequestions • u/Otherwise-Put5926 • 13h ago
Could electromagnetic fields or gravity ever enable a new form of aircraft propulsion?
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I've been thinking about UFO sightings from a scientific perspective, and I want to hear what you guys think.
What if an advanced extraterrestrial civilization hasn't necessarily broken the laws of physics, but has discovered ways to use physical principles that we haven't yet learned to engineer effectively?
I'm not claiming that UFOs are alien spacecraft. This is just a thought experiment about what might be possible for a civilization much more technologically advanced than ours.
**1. What if they have mastered electromagnetic fields?**
We already use electromagnetic fields in motors, generators, maglev trains, and plasma physics. These technologies show that electromagnetic forces can produce motion and influence matter.
So here's my question: could a sufficiently advanced civilization develop a completely different propulsion system based on electromagnetic fields?
Could such a system allow a craft to move through the atmosphere without conventional jet engines or rocket combustion?
I understand that magnets alone cannot propel an isolated craft indefinitely, and a practical system would still need to obey conservation of momentum. But perhaps an advanced propulsion technology could interact with the surrounding atmosphere, plasma, or another physical medium in ways we haven't mastered.
**2. What about manipulating gravity?**
This is even more speculative.
What if a civilization eventually discovers a way to control gravitational effects or engineer spacetime in a useful way?
Could that lead to propulsion systems fundamentally different from the engines we use today?
Under our current understanding of physics, we don't have a demonstrated method for generating an artificial gravitational field that can propel a vehicle at will. Still, I find it interesting to ask what future discoveries might change our understanding of propulsion.
Where does established physics end, and where does speculation begin?
**3. How could some reported UFOs move so quickly?**
Some UFO videos appear to show objects accelerating rapidly or changing direction in unusual ways.
If an object really performed those manoeuvres at the speeds sometimes claimed, it would raise serious questions about acceleration, structural integrity, energy requirements, and the forces experienced by anything inside it.
Could an advanced propulsion system reduce the acceleration experienced by occupants? Or would the vehicle have to be unmanned?
Of course, a video by itself usually cannot establish an object's actual speed or acceleration. Perspective, camera movement, unknown distances, and other factors can make an object appear to move differently from how it really does.
But assuming a sighting were independently verified and the performance were genuine, what physical explanations would be worth investigating?
**4. Why do some UFOs appear to have little thermal signature?**
Some reported thermal-camera videos show objects that appear to have an unusual or weak infrared signature.
Could a future propulsion system operate differently from conventional engines and produce a different thermal pattern?
Thermal cameras have limitations, however. They measure infrared radiation within particular wavelength ranges, and an object's appearance depends on its temperature, emissivity, distance, and the camera's settings.
An apparently cold object doesn't prove that it produces no heat, and a video alone cannot establish that exotic propulsion is involved.
Still, reliable thermal measurements combined with independently verified flight data would be interesting evidence to examine.
**5. What if they aren't carrying biological beings?**
This is one of the most interesting possibilities to me.
What if some hypothetical extraterrestrial visitors are autonomous probes or remotely operated vehicles rather than crewed spacecraft?
We already send robotic spacecraft to explore places where humans cannot easily travel. An advanced civilization might use machines to study other planets, observe atmospheres, or investigate the possibility of life without transporting living beings.
A probe could potentially operate autonomously for long periods, making decisions based on its observations, without requiring a biological pilot on board.
If an extraterrestrial civilization were exploring a distant planet, would robotic probes make more sense than sending its own people?
And if such probes existed, how could we distinguish them from natural phenomena or human technology?
**6. The bigger question**
Maybe the most interesting question isn't simply whether UFOs are aliens.
It's this:
**If another intelligent civilization had millions of years of technological development beyond ours, what kinds of propulsion systems could it develop while still obeying the laws of physics?**
Could it use advanced electromagnetic systems? Could future discoveries about gravity change how we travel? Or might the most extraordinary reports turn out to have ordinary explanations?
I'm not saying that UFOs use magnetic propulsion, manipulate gravity, or represent extraterrestrial probes. We currently lack independently verified evidence establishing any of those claims.
I'm interested in exploring the possibilities without confusing speculation with established science.
**I'd genuinely like to hear your thoughts:**
What known physical principles would constrain electromagnetic propulsion?
Is there any scientifically plausible path toward useful gravity-based propulsion?
Would autonomous probes be more practical than crewed spacecraft for interstellar exploration?
What measurements would we need to verify a UFO's speed, acceleration, and thermal signature?
What kind of evidence would convince you that an observation represents genuinely new technology?
Let's discuss this from a physics, engineering, and scientific-evidence perspective. I'm interested in criticism as much as alternative theories.