# SPDX-FileCopyrightText: © 2024 Christian BUHTZ <c.buhtz@posteo.jp>
#
# SPDX-License-Identifier: CC0-1.0
#
# This file is part of the program "Hyperorg". Unlike the program, this file is
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:PROPERTIES:
:ID:       b269a1be-6451-4b7c-abd7-615aa326f9e8
:END:
#+title: Saturn
#+date: [2024-06-12 10:50]
The [[id:9cdd8a15-9da1-4752-a59d-9a434cc33885][planet]] Saturn is the 6th in the [[id:55c55f73-9f29-49ad-a7b9-58a1b6757165][solar system]].

** Links about Saturn
This is a link to the related Wikipedia article:
[[https://en.wikipedia.org/wiki/Saturn]]

This is the same link using a description label: [[https://en.wikipedia.org/wiki/Saturn][Saturn (Wikipedia)]]

Here is a /dead/ link with a description label to an OrgRoam node that does not
exist anymore: [[id:f38262d6-3132-43cc-8ad6-d8ce0e8ea70c][Astronomical Units]]

Here is a /dead/ link to a OrgRoam node that does not exist anymore:
[[id:f38262d6-3132-43cc-8ad6-d8ce0e8ea70c]]

Supported or recognized *link types* are:

1. OrgRoam v2 ID Links
   - As code: =[[id:1234]]=
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2. ROAM Links
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   - Example: [[roam:OuterSpace]]
   - That links are not resolved.
3. Hypertext Transfer Protocol Secure (HTTPS)
   - As code: =[[https://emacs.org]]=
   - Example: [[https://emacs.org]]
4. Hypertext Transfer Protocol (HTTP)
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   - Example: [[http://emacs.org]]
   - Treated as insecure and not rendered as valid link because of that.
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   - Example: [[file:The_Blue_Marble_(remastered)_small.jpg]]
6. Other Files
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   - Example: [[file:foobar.zip]]
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   - As code: =[[doi:10.1007/s11214-020-00751-1]]=
   - Example: [[doi:10.1007/s11214-020-00751-1]]
9. Unknown link types
   - As code: =[[foobar:nirvana]]=
   - Example: [[foobar:nirvana]]
   - Hyperorg will also warn you on terminal about links of this type.

** Math about Saturn
*** Inline
Saturn’s surface gravity can be expressed inline as $g = \frac{GM}{R^2}$.

Or using the alternative syntax:
\(v = \sqrt{\frac{GM}{R}}\)

*** "Displayed" as blocks
Saturn’s surface gravity: \[g = \frac{GM}{R^2}\].

\[g = \frac{GM}{R^2}\]

\[
g = \frac{GM}{R^2}
\]

Or using the alternative syntax:
$$v = \sqrt{\frac{GM}{R}}$$
