Physics · Speculative Technology · Evidence-Based Analysis
Antigravity: Physics, Experiments, Claims, and What Science Supports
Quick answer: there is no scientifically verified technology that cancels, shields, or reverses gravity in the way commonly described as “antigravity.” However, the topic connects directly to 10 foundational entities across physics:Antigravity, Gravity, Mass, Weight,Gravitational Field, General Relativity,Equivalence Principle, Inertial Mass,Gravitational Mass, and Spacetime Curvature.
1. What “antigravity” means
The term antigravity is used in several different ways. In popular culture, it usually means a technology that makes objects float without visible support, reduces gravitational weight, or allows propulsion without conventional reaction mass.
In physics, however, the phrase is not a standard accepted force. To make the topic scientifically precise, we can separate antigravity claims into several categories:
- Gravity cancellation: reducing the local gravitational field.
- Gravitational shielding: blocking gravity with a material or field.
- Negative gravitational mass: matter that gravitationally repels normal matter.
- Apparent weight reduction: using electromagnetic, aerodynamic, or mechanical forces to oppose gravity.
- Speculative propulsion: claims of field-based thrust without conventional exhaust.
Most effects marketed as antigravity are actually cases where another force counteracts gravity. That is not antigravity; it is force balance.
Primary Conceptual Entities in Gravitational Physics
| Primary Entity | Category | Scientific Definition | Deep Dive |
|---|---|---|---|
| Antigravity | Theoretical & Speculative Physics | Hypothetical physical mechanism that reduces, cancels, shields, or inverts gravitational interaction or local spacetime curvature. | Explore Antigravity → |
| Gravity | Fundamental Interactions | Fundamental natural interaction by which all things with mass or energy are attracted to one another. | Explore Gravity → |
| Mass | Classical & Relativistic Mechanics | An intrinsic scalar physical property of matter quantifying its resistance to acceleration and strength of gravitational interaction. | Explore Mass → |
| Weight | Classical Mechanics | The downward vector force exerted on a mass by a local gravitational field (W = m · g). | Explore Weight → |
| Gravitational Field | Field Theory | A vector field model describing the gravitational force per unit mass exerted at every coordinate in space. | Explore Gravitational Field → |
| General Relativity | Modern Physics Theories | Albert Einstein’s geometric theory of gravitation where gravity arises as spacetime curvature caused by mass-energy. | Explore General Relativity → |
| Equivalence Principle | Gravitational Principles | Postulate asserting the exact equivalence of inertial mass and gravitational mass, establishing the universality of free fall. | Explore Equivalence Principle → |
| Inertial Mass | Classical & Relativistic Mechanics | The quantitative measure of an object’s resistance to changing its state of motion under an applied net force (F = m_i · a). | Explore Inertial Mass → |
| Gravitational Mass | Gravitational Physics | The property of matter that determines the strength of the gravitational force it exerts on and experiences from other bodies. | Explore Gravitational Mass → |
| Spacetime Curvature | Differential Geometry & Relativity | The geometric distortion of four-dimensional spacetime described by the Riemann and Einstein curvature tensors. | Explore Spacetime Curvature → |
Secondary Physical & Experimental Entities
| Secondary Entity | Category | Physical Description | Deep Dive |
|---|---|---|---|
| Negative Mass | Speculative Relativity | Hypothetical mass with negative sign that would produce gravitational repulsion and Bondi runaway motion. | Explore Negative Mass → |
| Negative Energy | Quantum Field Theory | Local quantum states where energy density drops below zero-point vacuum energy, constrained by Quantum Inequalities. | Explore Negative Energy → |
| Gravitational Shielding | Experimental Anomalies | Hypothetical blocking or attenuation of gravitational fields by materials or fields, refuted by high-precision tests. | Explore Gravitational Shielding → |
| Antimatter | Particle Physics | Real subatomic matter composed of antiparticles with identical positive mass but reversed electric charges and quantum numbers. | Explore Antimatter → |
| Antihydrogen | Atomic Physics | Bound state of an antiproton and positron, used in CERN ALPHA-g experiments to confirm downward gravitational free-fall. | Explore Antihydrogen → |
| Superconductors | Condensed Matter Physics | Materials exhibiting zero electrical resistance and expulsion of magnetic flux below critical transition temperature. | Explore Superconductors → |
| Diamagnetism | Electromagnetism | Property of materials that develop an opposing induced magnetic field, enabling passive room-temperature magnetic levitation. | Explore Diamagnetism → |
| Magnetic Levitation | Applied Physics & Transport | Suspending an object using electromagnetic forces to counteract gravitational force without physical contact. | Explore Magnetic Levitation → |
| Casimir Effect | Quantum Electrodynamics | Physical mechanical attractive or repulsive force arising from quantum zero-point fluctuations between closely spaced boundaries. | Explore Casimir Effect → |
| Quantum Vacuum | Quantum Field Theory | The lowest energy state of a quantum field containing zero-point energy, virtual particle pairs, and vacuum fluctuations. | Explore Quantum Vacuum → |
| Ion Wind | Plasma Physics & Aerodynamics | Electrohydrodynamic airflow generated by the electrostatic acceleration of ionized air molecules colliding with neutral gas. | Explore Ion Wind → |
| Acoustic Levitation | Acoustics & Fluid Dynamics | Suspending matter against gravity using acoustic radiation pressure generated by ultrasonic standing wave pressure nodes. | Explore Acoustic Levitation → |
| Optical Levitation | Optics & Photonics | Manipulating and levitating micro- and nanoscale dielectric particles using laser photon radiation pressure and gradient forces. | Explore Optical Levitation → |
| Propellantless Propulsion | Aerospace & Propulsion Physics | Spacecraft propulsion systems that do not expel reaction propellant mass, constrained by linear momentum conservation. | Explore Propellantless Propulsion → |
2. Real physics behind gravity
In standard physics, gravity is described by Einstein’s General Relativity as the curvature of spacetime caused by mass-energy. Near Earth’s surface, this produces an acceleration of approximately 9.81 m/s² downward.
Core Gravitational Relationships
- Mass: Invariant scalar source of gravitational attraction, explored in our guide to mass vs weight.
- Weight: Downward vector force exerted by local acceleration (W = m · g), measurable via precision force conversion tools.
- Gravitational Field: The continuous field vector described in gravitational fields and potential energy wells.
- Equivalence Principle: Exact equality between inertial and gravitational mass verified to 10⁻¹⁵ in our review of Equivalence Principle experiments.
- Inertial vs Gravitational Mass: The operational difference detailed in inertial mass vs gravitational mass.
Any claim of true antigravity must explain how it modifies or bypasses spacetime curvature in General Relativity or creates a divergence between inertial and gravitational mass without violating the Weak Equivalence Principle.
3. Levitation that is not antigravity
Many physical phenomena look like antigravity but are actually cases where an independent upward force balances downward gravitational pull. Compare the mechanisms below:
| Levitation Mechanism | Physical Operating Principle | Is it Antigravity? | In-Depth Physics Guide |
|---|---|---|---|
| Magnetic Levitation | Magnetic pressure (P = B²/2µ₀) produces upward mechanical force. | No (Force Balance) | Magnetic Levitation Physics → |
| Diamagnetic Levitation | Negative susceptibility (χ < 0) repels magnetic field gradients. | No (Electromagnetic) | Diamagnetic Levitation Guide → |
| Superconducting Levitation | Type-II Abrikosov vortex flux pinning creates 3D quantum locking. | No (Meissner Effect) | Superconducting Levitation → |
| Acoustic Levitation | Ultrasonic standing sound waves create pressure node traps. | No (Acoustic Radiation) | Acoustic Levitation Physics → |
| Optical Levitation | Focused laser photon radiation pressure and optical gradient traps. | No (Photon Momentum) | Optical Levitation & Tweezers → |
| Ion Wind Lift | Electrohydrodynamic (EHD) corona discharge accelerates ambient air ions. | No (Air Momentum) | Ion Wind Lift & EHD Thrusters → |
Use the live calculator below to calculate real magnetic pressure forces generated in magnetic levitation systems, using our Tesla to Gauss converter for field strength ratings:
Magnetic Pressure Force Calculator
Estimates force from magnetic pressure using F = B² / (2µ₀) × A. This is real magnetic levitation physics, not antigravity.
Estimated force: 3,978.8736 N
4. Research areas often linked to antigravity
What is Antigravity? →
Understand the core scientific distinction between force-balanced levitation and genuine spacetime metric modification in our definition of antigravity.
Explore antigravity definitions →Gravitational Shielding →
Evaluate Eugene Podkletnov's rotating ceramic disk claims and NASA MSFC Project Delta-G in our gravitational shielding investigation.
Read shielding test results →Negative Mass & Exotic Matter →
Discover Bondi runaway motion, energy condition violations, and Alcubierre warp drives in our guide to negative mass in General Relativity.
Explore negative mass physics →Antimatter Gravity (ALPHA-g) →
Does antimatter fall up? Review CERN’s landmark 2023 direct observation of downward antihydrogen free-fall in our antimatter gravity report.
Read CERN ALPHA-g analysis →Superconducting Levitation →
Explore Type-II flux pinning and frictionless quantum locking in our superconducting levitation deep-dive.
Understand quantum locking →Weight vs Mass →
Learn the difference between invariant scalar mass (kg) and gravitational force (N) across planets in our weight vs mass metrology guide.
Explore weight vs mass →5. How to evaluate antigravity claims
Extraordinary claims require strong evidence. A credible antigravity experiment should be reproducible, independently verified, carefully calibrated, and able to eliminate conventional forces such as magnetism, electrostatics, air currents, vibration, thermal expansion, and measurement error.
Many historical and modern antigravity claims fail because they do not separate measurement error, environmental forces, or conventional propulsion from a genuine gravitational anomaly.
- Is the effect measured in vacuum? Airflow and ion wind can create apparent lift.
- Is the force calibrated? Scales, balances, and load cells need careful calibration.
- Are electromagnetic fields controlled? Magnetic and electrostatic forces can easily mimic weight reduction.
- Is thermal expansion involved? Heating can distort apparatus and create false signals.
- Is the experiment reproducible? Independent replication is essential.
- Does it violate conservation laws? Claims must explain energy, momentum, and mass-energy balance.
- Is there a theoretical mechanism? A credible claim should connect to known physics or propose testable new physics.
Evidence checklist
- Peer-reviewed publication in established physics journals
- Independent replication by third-party laboratories
- Blind or controlled measurement protocols
- Rigorous uncertainty and systematic error analysis
- Elimination of electromagnetic, thermal, and convective artifacts
- Consistent theoretical mechanism obeying conservation laws
Authoritative Source & Trust Entities
| Trust Entity | Full Institutional Name / Framework | Organization Type | Empirical Validation Role |
|---|---|---|---|
| NIST | National Institute of Standards and Technology | Government Metrology Institution | Precision measurement standards, fundamental physical constants, and gravitational null-result replications (Faller et al.). |
| NASA | National Aeronautics and Space Administration | Space Exploration & Research Agency | Breakthrough Propulsion Physics Project (1996–2002), Project Delta-G superconductor testing at Marshall Space Flight Center, and vacuum thruster evaluations. |
| CERN | European Organization for Nuclear Research | International Particle Physics Laboratory | Antiproton Decelerator (AD) facility, direct gravitational free-fall measurements on antimatter via the ALPHA-g, AEgIS, and GBAR collaborations. |
| International Bureau of Weights and Measures | Bureau International des Poids et Mesures (BIPM) | Intergovernmental Metrology Organization | Custodians of the International System of Units (SI), precision balance beam gravimetry (Terry Quinn null tests), and metrological standards. |
| General Relativity | Einstein’s Theory of General Relativity | Empirically Validated Gravitational Framework | The geometric foundation of modern gravitation, validated by gravitational lensing, orbital precession, gravitational waves (LIGO), and black hole imaging. |
| Equivalence Principle experiments | Universality of Free Fall & Equivalence Principle Testing Programs | Empirical Physics Experimental Framework | Rigorous tests bounding composition-dependent gravitational acceleration to 10⁻¹⁵ (CNES MICROSCOPE satellite, Eötvös torsion balances, Lunar Laser Ranging). |
| Antihydrogen experiments | Neutral Antimatter Gravitational Acceleration Experiments | Precision Antimatter Gravitational Research | Landmark 2023 CERN ALPHA-g observation proving antihydrogen atoms accelerate downward under Earth gravity at (0.75 ± 0.29) g. |
| Peer-reviewed physics journals | Authoritative Physics Research Literature | Scientific Peer-Review System | Gold standard validation including Physical Review Letters (APS), Nature, Nature Physics, Physical Review D, and Classical and Quantum Gravity. |
6. Measurements and units
Antigravity and propulsion research requires high-precision measurement across 16 core measurement entities, spanning forces from Newtons to nanoNewtons, magnetic fields from Tesla to Gauss, and timescales down to microseconds.
| Measurement Entity | Symbol | Physical Quantity | Scientific Scope | Converter & Reference Tool |
|---|---|---|---|---|
| Newton | N | Force | SI derived unit of force: 1 N = 1 kg·m/s². The force required to accelerate 1 kg at 1 m/s². | Convert & Calculate → |
| Micronewton | µN | Force | One millionth of a Newton (10⁻⁶ N), the standard scale for measuring microscopic gravitational and propulsion forces. | Convert & Calculate → |
| Nanonewton | nN | Force | One billionth of a Newton (10⁻⁹ N), the force regime of atomic force microscopy and optical laser radiation pressure. | Convert & Calculate → |
| Tesla | T | Magnetic Flux Density | SI unit of magnetic B-field strength: 1 T = 1 Wb/m² = 1 N/(A·m). | Convert & Calculate → |
| Gauss | G | Magnetic Flux Density | CGS unit of magnetic flux density: 1 Tesla = 10,000 Gauss. Earth’s magnetic field is ~0.5 Gauss. | Convert & Calculate → |
| Meter | m | Length | SI base unit of length, defined by the distance light travels in vacuum in 1/299,792,458 of a second. | Convert & Calculate → |
| Micrometer | µm | Length | One millionth of a meter (10⁻⁶ m / micron), the characteristic scale of biological cells and infrared wavelengths. | Convert & Calculate → |
| Nanometer | nm | Length | One billionth of a meter (10⁻⁹ m), the scale of semiconductor gates, DNA helix diameter (2 nm), and visible light wavelengths. | Convert & Calculate → |
| Second | s | Time | SI base unit of time, defined by 9,192,631,770 periods of the radiation from the cesium-133 atom. | Convert & Calculate → |
| Microsecond | µs | Time | One millionth of a second (10⁻⁶ s), the timescale of relativistic GPS satellite orbital corrections (+38.6 µs/day). | Convert & Calculate → |
| Kilogram | kg | Mass | SI base unit of mass, defined by taking the fixed numerical value of the Planck constant h = 6.62607015 × 10⁻³⁴ J·s. | Convert & Calculate → |
| Gram | g | Mass | One thousandth of a kilogram (10⁻³ kg), the foundational mass unit of the CGS metric system. | Convert & Calculate → |
| Microgram | µg | Mass | One millionth of a gram (10⁻⁶ g / 10⁻⁹ kg), used in pharmaceutical micro-dosing and high-precision gravimetry. | Convert & Calculate → |
| Acceleration | m/s² | Kinematics | Rate of change of velocity per unit time. Standard gravity on Earth is defined as g = 9.80665 m/s². | Convert & Calculate → |
| Force | F | Dynamics | An interaction that changes the motion of an object with mass (F = m · a), measured in Newtons. | Convert & Calculate → |
| Pressure | Pa | Thermodynamics & Fields | Force applied perpendicular to the surface of an object per unit area (P = F / A), measured in Pascals (N/m²). | Convert & Calculate → |
7. Antigravity FAQ
Is antigravity possible?
There is no verified antigravity technology at present. Some theoretical ideas involve exotic matter, negative energy, or modifications to gravity, but they remain speculative and experimentally unconfirmed.
Is antigravity real?
No verified, reproducible technology has been demonstrated that cancels or shields gravity in the way popularly described as antigravity.
Does antimatter fall up?
Current experimental evidence indicates that antimatter behaves gravitationally like normal matter within measurement limits. Antihydrogen experiments are improving precision, but no confirmed upward gravitational effect has been established.
Can magnets create antigravity?
Magnets can levitate objects by producing forces that oppose gravity. This is magnetic levitation, not antigravity. The gravitational field remains present.
What is gravitational shielding?
Gravitational shielding is the idea that a material or field could block or reduce gravity. This has not been experimentally validated and conflicts with standard gravitational physics unless new physics is involved.
What is negative mass?
Negative mass is a hypothetical concept in which an object would have mass with unusual inertial or gravitational behavior. It remains speculative and has not been demonstrated as a practical material.
Can superconductors create antigravity?
Superconductors enable important levitation effects, such as flux pinning and magnetic levitation, but there is no accepted experimental evidence that they produce gravitational shielding or antigravity.
8. Scientific References & Primary Literature
To ensure scientific accuracy and empirical rigour, the concepts, equations, and experimental evaluations across this guide are grounded in authoritative metrology standards and peer-reviewed physical literature:
Authoritative References
Authoritative Metrology & Institutional Sources
- NIST (National Institute of Standards and Technology):
Standard Reference Materials, CODATA fundamental physical constants (G = 6.67430 × 10⁻¹¹ m³·kg⁻¹·s⁻²), and high-precision gravimetric balance calibration protocols. [nist.gov] - NASA (National Aeronautics and Space Administration):
Breakthrough Propulsion Physics (BPP) Project (NASA/TM—2004-213082), Project Delta-G superconductor gravity anomaly evaluations at Marshall Space Flight Center, and microgravity science databases. [nasa.gov] - CERN (European Organization for Nuclear Research):
Antiproton Decelerator experimental results; ALPHA-g Collaboration, "Observation of the effect of gravity on the motion of antimatter," Nature 621, 716–722 (2023). [home.cern] - International Bureau of Weights and Measures (BIPM):
The International System of Units (SI Brochure, 9th edition, 2019), BIPM precision balance beam gravimetry, and fundamental definitions of the kilogram, Newton, meter, second, and Tesla. [bipm.org] - American Physical Society (APS):
Physics research guidelines, Physical Review Letters (PRL), Physical Review D (Particles, Fields, Gravitation, and Cosmology), and Reviews of Modern Physics. [journals.aps.org]
Key Peer-Reviewed Literature
- Alcubierre, M. (1994). "The warp drive: hyper-fast travel within general relativity." Classical and Quantum Gravity, 11(5), L73.
- Touboul, P. et al. (MICROSCOPE Collaboration, 2022). "MICROSCOPE Mission: Final Results of the Test of the Equivalence Principle." Physical Review Letters, 129(12), 121102.
- Bondi, H. (1957). "Negative Mass in General Relativity." Reviews of Modern Physics, 29(3), 423–428.
- Tajmar, M. et al. (2021). "High-Accuracy Thrust Measurements of the EmDrive and Cannae Drive in Vacuum." Acta Astronautica, 181, 538–545.
- Lamoreaux, S. K. (1997). "Demonstration of the Casimir Force in the 0.6 to 6 µm Range." Physical Review Letters, 78(1), 5–8.
- Berry, M. V., & Geim, A. K. (1997). "Of Flying Frogs and Levitrons." European Journal of Physics, 18(4), 307–313.
Final takeaway
Antigravity remains speculative. The strongest way to build authority on this topic is to cover it with scientific precision: define the entities, separate real levitation from hypothetical gravity cancellation, connect the topic to measurable quantities, and cite authoritative physics sources.