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https://github.com/Jermolene/TiddlyWiki5
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a9f9ffd409
* First commit * Typo * Add support for delay parameter * Add confetti widget * Add tour plugin * Add element spotlight to dynannotate plugin Useful for highlighting on screen elements for the user * More and bigger confetti by default * Use new element spotlight to provide hints * Adjust hint selectors for create tiddler tour step * Include confetti plugin in prerelease * Clarify wording of confetti demo * Don't link TiddlyWiki in the tour panel * Tweaks to tour buttons * Mark dependents of the tour plugin * Add full screen section of tour and tour edition * Remove Anna Freud references from welcome tiddler * Build the tour edition in the preview * Fix typo in build script * Populate tour edition with solar system data From Simple English Wikipedia * Missing tag * Add page control button to start tour Also make the tour controls visible in full screen mode * Refactor to use global procedures to control the tour * Change "startup-actions" field to "enter-actions" to avoid confusion * Add a tour logo * Refactor to allow multiple tours to be loaded at once * Remove wikification from welcome tour step * Update docs * Simplify styles for top bar * Tours should have a $:/tags/Tour tag * Tour should autostart in the tour edition, but not in the main wiki * Better labelling for the main preview * Fix build process We build a separate tour.html wiki, but can include the tour in other wikis too * Remove obsolete text * Add "using tags" as a separate tour * Remove old debugging code * Add tour chooser * Ensure that the current tour isn't listed as an option in the final step * Use whitespace trim Note that the setting is inherited by procedure and widget definitions * Simplify tour step format * Remove obsolete state tiddler Not needed because now we initialise it in startup actions * Fix gap between navigation buttons * Clean up tiddler titles within the introduction tour * Finish allowing the name "TiddlyWiki" to be customised Some of the code was in the previous commit. Next we'll wire up the user interface * Clarify docs * Add a settings pane giving a birds eye view of a tour * Avoid having to embed confetti in the final step * Update docs * Tweak styling of tour chooser dropdown * Add a button to launch tour steps directly, and give them captions * Expose custom tour settings * Use the tour step caption as the heading * Fix initialisation when jumping to a tour step * Introduce step about tags * Improve wording * Improve styling of task call-to-action and nav buttons * Adopt new conditional shortcut syntax * Wording and ordering tweaks * Fix typos Thanks @pmario * Simplify styling of tour overlay * Use custom palette colours Makes it easier for people to use their own colour scheme for the tour * More custom colours * Tour wording tweaks * Extends the tour plugin with a condition field (#7861) * feat: support condition field to determine whether a step should be shown * feat: add support for overriding the hint text using the field 'hint' from the step tiddler * fix: roll back tour display procedure for now until an override mechanism has been discussed * fix: renamed advance-criterion field and associated variables to step-success-filter * fix: renamed hint field to hint-text and selector to hint-selector * refactor: to create function to get all tour tiddlers filtered by their condition field * refactor: rename globals tiddlers to variables and avoid making any of the tour procedures global * fix: also rename globals.tid file to variables.tid * docs: cover all tour steps tiddler fields * fix: improve spacing in Tour HUD * WIP --------- Co-authored-by: Jeremy Ruston <174761+Jermolene@users.noreply.github.com> Co-authored-by: Saq Imtiaz <saq.imtiaz@gmail.com>
17 lines
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17 lines
2.0 KiB
Plaintext
created: 20230720112554020
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modified: 20230720112827830
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title: Asteroid
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type: text/vnd.tiddlywiki
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tags: [[Solar System]]
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[img class=hero-image [Asteroid (253) Mathilde Image]]
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An asteroid is a space rock. It is a small object in the [[Solar System]] that travels around the [[Sun]]. It is like a [[planet|Planet]] but smaller. They range from very small (smaller than a car) to 600 miles (1000 km) across. A few asteroids have asteroid moons.
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The name "asteroid" means "like a star" in the ancient Greek language. Asteroids may look like small stars in the sky, but they really do move around the [[Sun]], while stars only seem to move because the [[Earth]] spins. Like [[planets|Planet]], asteroids do not make their own light. Because of this, some people think "asteroids" is not a good name, and think that the name "planetoid" ("like a planet") would be a better name.
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Giuseppe Piazzi found the first asteroid, in 1801. He called it Ceres, and it is the biggest object in the asteroid belt. Others, like Juno, Pallas, and Vesta were found later. In the 1850s so many had been found, that they were numbered by a Minor planet designation starting with 1 Ceres. Today, astronomers using computerized telescopes find thousands of asteroids every month. Asteroid impact prediction is one of the purposes.
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Asteroids are the leftover rock and other material from the formation of the [[Solar System]]. These rocks were too small to come together to make a [[planet|Planet]]. Some are made of carbon or metal. Depending on what's on the surface, they are classified into various asteroid spectral types including Type M (metal), Type S (stone), and Type C (carbon).
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Most asteroids in our [[Solar System]] are in the asteroid belt between [[Mars]] and [[Jupiter]]. Many are not in the main asteroid belt. The ones that come close to [[Earth]] are called Near-Earth asteroids. Many scientists think asteroids striking the [[Earth]] killed off all the dinosaurs and caused some of the other extinction events. |