Planets: Difference between revisions
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There are two main categories of '''planets''': [[Terrestrial Planet]]s and [[Gas Giant]]s. Some types of Terrestrial Planets support [[Species|lifeforms]] or meet the conditions for [[terraforming]]. [[Ships]] equipped with the [[Planetary Approach Suite]] may [[Planetary Landings|land on the surface]] of Terrestrial Planets with 0 to tenuous (0.01-0.10) [[Atmosphere|atmospheres]]. Some planets have a [[Planetary Ring System|planetary ring system]]. | There are two main categories of '''planets''': [[Terrestrial Planet]]s and [[Gas Giant]]s. Some types of Terrestrial Planets support [[Species|lifeforms]] or meet the conditions for [[terraforming]]. [[Ships]] equipped with the [[Planetary Approach Suite]] may [[Planetary Landings|land on the surface]] of Terrestrial Planets with 0 to tenuous (0.01-0.10) [[Atmosphere|atmospheres]]. Some planets have a [[Planetary Ring System|planetary ring system]]. | ||
* The [[:Category:Planets|category]] has a list of notable planets. | |||
== Description == | |||
The term planet refers to a celestial body that orbits a [[star]] with a [[gravity]] in a specific range. The gravity of a planet must be strong enough to hold fluids and plastic solids in a stable state (hydrostatic equilibrium) which prevents them from escaping the planet and it makes the body round, and low enough to prevent stellar nuclear processes to start. | The term planet refers to a celestial body that orbits a [[star]] with a [[gravity]] in a specific range. The gravity of a planet must be strong enough to hold fluids and plastic solids in a stable state (hydrostatic equilibrium) which prevents them from escaping the planet and it makes the body round, and low enough to prevent stellar nuclear processes to start. | ||
Astronomical objects that meet the official criteria for planet status yet orbit a planet are instead classified as natural satellites or [[moons]]. When the [[barycentre]] of the planet-moon system falls outside the planet, then both bodies are considered planets and part of a double-planet system.<ref>[https://www.universetoday.com/85749/is-the-moon-a-planet/ Universe Today: Is The Moon A Planet?]</ref> | Astronomical objects that meet the official criteria for planet status yet orbit a planet are instead classified as natural satellites or [[moons]]. When the [[barycentre]] of the planet-moon system falls outside the planet, then both bodies are considered planets and part of a double-planet system.<ref>[https://www.universetoday.com/85749/is-the-moon-a-planet/ Universe Today: Is The Moon A Planet?]</ref> | ||
==[[Terrestrial Planet]]s== | ==[[Terrestrial Planet]]s== | ||
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|''Outdoor world with a human-breathable atmosphere and indigenous life. The atmosphere is far from chemical equilibrium as a result.'' | |''Outdoor world with a human-breathable atmosphere and indigenous life. The atmosphere is far from chemical equilibrium as a result.'' | ||
|Rare | |Rare | ||
|[[File: | |[[File:Earth-like World Kyaraben.jpg|thumb|center]] | ||
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|Rare | |Rare | ||
|[[File:Water Giant.png|thumb|center]] | |[[File:Water Giant.png|thumb|center]] | ||
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== Features == | |||
{| class="wikitable unsortable" style="text-align:center;" border="1" | |||
|- | |||
!Type | |||
!Description | |||
!Rarity | |||
!Image | |||
|- | |||
|Dwarf planet | |||
|''A dwarf planet orbits a [[Stars|star]] and has sufficient mass and [[gravity]] for a round shape, but it does not clear its orbital neighborhood of debris. Their orbital path is shared with other space objects and rocks. Dwarf planets are very common in the galaxy. Examples of dwarf planets in [[Sol]]: [[Haumea]], [[Makemake]], [[Persephone]], [[Pluto]], [[Salacia]], [[Sedna]].'' | |||
|Common | |||
|[[File:Makemake.jpg|thumb|center]] | |||
|- | |||
|[[Atmosphere|Tenuous atmosphere]] | |||
|''Planets with tenuous atmospheres have surface pressures well below Earth, ranging from thin exospheres (where gases rarely collide) to denser, transient envelopes. Tenuous atmospheres are common for rocky and icy bodies, because they are a natural equilibrium between atmospheric generation and atmospheric loss.'' | |||
|Common | |||
|[[File:Water Atmosphere ED 1.jpg|thumb|center]] | |||
|- | |||
|Thick fog effect | |||
|''Rocky bodies can have a thick fog effect that covers the surface.''<ref name=":0">[https://www.reddit.com/r/EliteDangerous/comments/1wv39j2/the_fogsuper_atmosphere_mystery_of_hip_87621/ The FOG/super atmosphere mystery of HIP 87621 solved!] -SeawolvesTV - 4 Dec 2020 - Reddit</ref> ''For example "[[HIP 87621]] 2 B B" has around 400 meter high, thick fog.''<ref name=":0" /><ref>[https://inara.cz/elite/starsystem-bodies/4414405/ HIP 87621] - Star System - INARA</ref> This effect is caused by flying inside the eclipse zone of a rocky body with a water atmosphere.<ref name=":1">[https://www.youtube.com/watch?v=Mtm03vCjH1s The FOG/super atmosphere mystery of HIP 87621 solved!] - VRFlorian - 2 October 2026</ref> ''The fog is an aerosol made of tiny liquid water droplets or ice crystals in the air.'' ''These conditions are rare.''<ref name=":0" /> | |||
|Rare | |||
|[[File:Thick Fog HIP 87621 2 B B.jpg|thumb|center]] | |||
|- | |||
|Tidally locked | |||
|''Tidally locked planets have a matching rotation period with the host star. One hemisphere has perpetual daylight while the other has only night. The [[Moon]] is also tidally locked to [[Earth]].'' | |||
|Rare | |||
|[[File:Tidally Locked Earth-like World.jpg|thumb|center]] | |||
|} | |} | ||
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File:Elite Dangerous - Relax in Space 1 Ambient Music Deep Relaxation & Meditation & Sleep & Chill Out | File:Elite Dangerous - Relax in Space 1 Ambient Music Deep Relaxation & Meditation & Sleep & Chill Out | ||
File:4 HOURS of Spaceflight with AMBIENT MUSIC in ELITE DANGEROUS | File:4 HOURS of Spaceflight with AMBIENT MUSIC in ELITE DANGEROUS | ||
File:A new BLUE FOG mystery on HIP 87621?! Something very unusual happened here... | |||
File:The Blue Phenomenon - Dense Planetary Atmosphere - Elite Dangerous Odyssey | |||
</gallery> | </gallery> | ||