# Curran 2021: 'Oumuamua as a light sail: evidence against artificial origin > S. J. Curran, 2021. 3 records on Mysteries Department cite it. The travel-time argument against a deliberate probe. Source: https://mysteriesdept.com/sources/SRC0CSKBKPA2Q52/oumuamua-as-a-light-sail-evidence-against-artificial-origin Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) --- [Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Curran 2021 **0** # 'Oumuamua as a light sail: evidence against artificial origin S. J. Curran, 2021. _Astronomy and Astrophysics_. Takes the radiation-pressure reading at face value (about 40 tonnes, about 1 mm thick) and shows that such a sail could not have been accelerated to useful speeds, so that it would need about half a billion years to arrive from the nearest plausible origin system. A&A 649, L17. **1I/'Oumuamua** Articledoi: **[10.1051/0004-6361/202141283](https://doi.org/10.1051/0004-6361/202141283)** Checked against the original0 ## What it's used for here The travel-time argument against a deliberate probe. ## Cited by on this site 3 records [A sail would need about half a billion years to arrive from its likeliest origin.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCNW251J9/a-sail-would-need-about-half-a-billion-years-to-arrive-from) Evidence EVD [Such a sail could not have been accelerated fast enough to arrive from a nearby star in less than about half…](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKC7YR1WYV/such-a-sail-could-not-have-been-accelerated-fast-enough-to) Evidence EVD [1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua) The mystery article MYS ## Cite it ``` Curran, S. J. (2021). 'Oumuamua as a light sail: evidence against artificial origin. Astronomy and Astrophysics. https://doi.org/10.1051/0004-6361/202141283 ``` [Read it free at doi.org](https://doi.org/10.1051/0004-6361/202141283) Key **SRC** 0CSKBKPA2Q52 Kind Journal article Rights The publisher's Kept 27 Oct 2026, for editors Checked Against the published article Added by [apollo](https://mysteriesdept.com/u/apollo) The record Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS. [CSL-JSON](https://mysteriesdept.com/sources/SRC0CSKBKPA2Q52/oumuamua-as-a-light-sail-evidence-against-artificial-origin/csl.json)