Editing 2783: Ruling Out

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==Explanation==
 
==Explanation==
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{{incomplete|Created by a TECTONICALLY-ACTIVE BOT WITH SUBSURFACE OCEANS. Do NOT rule out this tag too soon.}}
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Most science studies are intended to discover new knowledge. In astronomy, the goal is often to find different types of objects in space, or learn how astronomical objects are formed and behave. But often from studying things that exist, we also learn about limits of the kinds of things that ''can'' exist; when this happens, we say that we've "ruled out" the excluded phenomena.
 
Most science studies are intended to discover new knowledge. In astronomy, the goal is often to find different types of objects in space, or learn how astronomical objects are formed and behave. But often from studying things that exist, we also learn about limits of the kinds of things that ''can'' exist; when this happens, we say that we've "ruled out" the excluded phenomena.
  
 
[[Cueball]] lists five obviously{{Citation needed}} impossible objects.
 
[[Cueball]] lists five obviously{{Citation needed}} impossible objects.
  
* "Earthlike stars": A play on "Earth-like planets" which scientists are very interested in finding. The [https://solarsystem.nasa.gov/planets/earth/overview/ Earth] is not a {{w|star}}, hence stars cannot be Earthlike.
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* "Earthlike stars": A play on "Earth-like planets" which scientists are very interested in finding. The Earth is not a star,{{Citation needed}} hence stars cannot be Earthlike.
 
: Searches for both {{w|List of potentially habitable exoplanets|Earth-like planets}} and {{w|Solar analog|Sun-like stars}} go unabated, with various near matches found.
 
: Searches for both {{w|List of potentially habitable exoplanets|Earth-like planets}} and {{w|Solar analog|Sun-like stars}} go unabated, with various near matches found.
  
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: The possibility of subsurface oceans within various planets and moons is an {{w|Extraterrestrial liquid water|active subject of study}}, and was previously mentioned 10 comics ago in [[2773: Planetary Scientist]].
 
: The possibility of subsurface oceans within various planets and moons is an {{w|Extraterrestrial liquid water|active subject of study}}, and was previously mentioned 10 comics ago in [[2773: Planetary Scientist]].
  
* "Tectonically active black holes": Black holes do not have {{w|tectonic plate}}s, so they cannot be tectonically active.
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* "Tectonically active black holes": Black holes do not have {{w|tectonic plate}}s, so they cannot be tectonically active.{{Citation needed}}
 
: There are theories that neutron stars can exhibit {{w|Quake (natural phenomenon)#Starquake|tectonic-like movements}} (as some of the more typical rocky bodies certainly do), but the physics of the 'inside' of a black hole are thought to involve {{w|Black hole#Singularity|strange physics}} incompatible with any form of geology, and cannot be observed anyway – it is believed that the only externally-observable properties of black holes are mass, electric charge, and angular momentum, poetically called the '{{w|no-hair theorem}}'.
 
: There are theories that neutron stars can exhibit {{w|Quake (natural phenomenon)#Starquake|tectonic-like movements}} (as some of the more typical rocky bodies certainly do), but the physics of the 'inside' of a black hole are thought to involve {{w|Black hole#Singularity|strange physics}} incompatible with any form of geology, and cannot be observed anyway – it is believed that the only externally-observable properties of black holes are mass, electric charge, and angular momentum, poetically called the '{{w|no-hair theorem}}'.
  
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[[Category:Astronomy]]
 
[[Category:Astronomy]]
 
[[Category:Science]]
 
[[Category:Science]]
[[Category:Scientific research]]
 

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