Current technology allows accelerating space probes to a quarter of the speed of light

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that current technology allows accelerating space probes to a quarter of the speed of light?

Yes. Current proposed technology, specifically initiatives like Breakthrough Starshot, relies on laser-driven photonic propulsion to accelerate lightweight lightsails to approximately one-fifth to a quarter of the speed of light.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 4 Aug 2026

The analysis

The claim states that current technology allows accelerating space probes to a quarter of the speed of light. Papers [3] and [10] discuss the Breakthrough Starshot initiative, which is actively designing and testing photonic propulsion systems using laser beams to accelerate lightsails to relativistic speeds around 0.2c (one-fifth of the speed of light, very close to a quarter). Since these papers support the feasibility and ongoing development of technology aiming for speeds on this order of magnitude, and no papers refute the proposition, the verdict is SUPPORTED.

Evidence for · 2

Multifunctional metasails for self-stabilized beam-riding and optical communication.

2022

This paper discusses Breakthrough Starshot, an initiative aiming to accelerate lightsail-driven spacecraft to relativistic velocities of 0.2c using radiation pressure from a high-power laser beam.

Get citation

M, T., MM, S., & H, M. (2022). Multifunctional metasails for self-stabilized beam-riding and optical communication.. doi.org. https://doi.org/10.1039/d1na00747e

See more details

More for · 1

Pentagonal photonic crystal mirrors: scalable lightsails with enhanced acceleration via neural topology optimization.

2025

This study notes that the Breakthrough Starshot initiative aims to send probes propelled by laser-driven lightsails at a fifth of the speed of light (0.2c).

Get citation

L, N., S, Y., MHJ, d. J., F, S., H, A., PM, S., MA, B., & RA, N. (2025). Pentagonal photonic crystal mirrors: scalable lightsails with enhanced acceleration via neural topology optimization.. doi.org. https://doi.org/10.1038/s41467-025-57749-y

Related receipts

Is it true that current space probe speeds are fundamentally limited by propulsion technology? SUPPORTED related question, same topic
Is it true that relativistic space probes reaching 0.1c are feasible with present-day technology? SUPPORTED related question, same topic

Receipt History

first checked04 Aug 2026

judged → SUPPORTED · 8004 Aug 2026

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

See the evidence timeline

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work