Editing Helios (section)

== Namesakes ==
Helios is the Greek proper name for the [[Sun]] for both [[Ancient Greek|Ancient]] and [[Modern Greek]],<ref>{{Cite dictionary |url=http://www.lexico.com/definition/Helios |archive-url=https://web.archive.org/web/20200327234645/https://www.lexico.com/definition/helios |url-status=dead |archive-date=March 27, 2020 |title=Helios |dictionary=[[Lexico]] UK English Dictionary |publisher=[[Oxford University Press]]}}</ref> and additionally [[List of geological features on Hyperion#Craters|Helios]], one of the craters of [[Hyperion (moon)|Hyperion]], a [[Natural satellite|moon]] of [[Saturn]] which bears Helios' father's name, is named after this Greek god. Several words relating to the Sun derive from "helios", including the rare adjective heliac (meaning "solar"),<ref>{{OED|heliac}}</ref> [[heliosphere]], [[Apsis#Perihelion and aphelion|perihelion and aphelion]] among others.

The [[chemical element]] [[Helium]], a colorless, odorless, tasteless, non-toxic, [[Inert gas|inert]], [[monatomic]] [[gas]], first in the [[noble gas]] group in the [[periodic table]], was named after Helios by [[Norman Lockyer]] and [[Edward Frankland]], as it was first observed in the [[Emission spectrum|spectrum]] of the [[chromosphere]] of the Sun.<ref>{{OEtymD|helium}}</ref><ref>{{Cite journal |last=Thomson |first=William |date=August 3, 1871 |volume=4 |pages=261–278 [268] |doi=10.1038/004261a0 |title=Inaugural Address of Sir William Thomson |journal=Nature |url=https://books.google.com/books?id=IogCAAAAIAAJ&pg=PA268 |quote=Frankland and Lockyer find the yellow prominences to give a very decided bright line not far from D, but hitherto not identified with any terrestrial flame. It seems to indicate a new substance, which they propose to call Helium |bibcode=1871Natur...4..261. |issue=92 |pmc=2070380 |access-date=February 22, 2016 |archive-url=https://web.archive.org/web/20161202011154/https://books.google.com/books?id=IogCAAAAIAAJ&pg=PA268 |archive-date=December 2, 2016 |url-status=live }}</ref>

[[Helius (fly)|Helius]] is a [[genus]] of [[crane fly]] in the family [[Limoniidae]] that shares its name with the god.

A pair of [[Space probe|probes]] that were launched into heliocentric orbit by [[NASA]] to study solar processes were called [[Helios (spacecraft)|Helios A and Helios B]].<ref>{{Cite web|url=https://www.n2yo.com/database/?m=12&d=10&y=1974|title=Search Satellite Database: HELIOS 1|website=www.n2yo.com}}; {{Cite web|url=https://www.n2yo.com/database/?m=01&d=15&y=1976|title=Search Satellite Database: HELIOS 2|website=www.n2yo.com}}</ref><ref>[https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1974-097A NASA Space Science Data Coordinated Archive] and [https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1976-003A NASA Space Science Data Coordinated Archive] Note that there is no "Epoch end" date given, which is NASA's way of saying it is still in orbit.</ref>