# \#light-sail

**URL:** https://scanalyst.fourmilab.ch/tag/light-sail/586.md

[Latest](https://scanalyst.fourmilab.ch/latest.md) · [Categories](https://scanalyst.fourmilab.ch/categories.md) · [Tags](https://scanalyst.fourmilab.ch/tags.md)

---

## [Kevin Parkin on Thermal Rockets, Inference Engines, and Light Sails](https://scanalyst.fourmilab.ch/t/kevin-parkin-on-thermal-rockets-inference-engines-and-light-sails/3917)

<div class="topic-metadata">

**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 1\
**Last updated:** [28 October 2023 19:54 UTC](https://scanalyst.fourmilab.ch/t/kevin-parkin-on-thermal-rockets-inference-engines-and-light-sails/3917 "2023-10-28T19:54:19Z")

</div>

For more than twenty years, Kevin Parkin has explored space propulsion concepts in which microwave beams, directed from the Earth, are used to propel vehicles in space with an efficiency far beyond that ach…

---

## [Research Programs Arising from 'Oumuamua Considered as an Alien Craft](https://scanalyst.fourmilab.ch/t/research-programs-arising-from-oumuamua-considered-as-an-alien-craft/457)

<div class="topic-metadata">

**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 2\
**Last updated:** [28 November 2021 03:17 UTC](https://scanalyst.fourmilab.ch/t/research-programs-arising-from-oumuamua-considered-as-an-alien-craft/457 "2021-11-28T03:17:55Z")

</div>

Marvin Ellis of the Harvard/Smithsonian Center for Astrophysics has published a paper on arXiv, “Research Programs Arising from ‘Oumuamua Considered as an Alien Craft” arguing that ‘Oumuamua (1I/2017 U1), the first unamb…