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Introduce Tour Plugin and Confetti Plugin, improve Dynannotate Plugin #7734

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merged 84 commits into from
Jan 25, 2024
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8a1ec1d
First commit
Jermolene Jan 15, 2023
c977bae
Typo
Jermolene Jan 15, 2023
9676706
Add support for delay parameter
Jermolene Jan 16, 2023
5b9f464
Add confetti widget
Jermolene Jan 16, 2023
f4f3746
Add tour plugin
Jermolene Jan 16, 2023
75af831
Merge branch 'master' into confetti-plugin
Jermolene Jan 24, 2023
1d32ef4
Add element spotlight to dynannotate plugin
Jermolene Feb 1, 2023
8169e43
More and bigger confetti by default
Jermolene Feb 1, 2023
0bc6dec
Merge branch 'master' into confetti-plugin
Jermolene Feb 1, 2023
5fe542a
Use new element spotlight to provide hints
Jermolene Feb 1, 2023
74258d6
Adjust hint selectors for create tiddler tour step
Jermolene Apr 12, 2023
0c67269
Merge branch 'master' into confetti-plugin
Jermolene Apr 12, 2023
55a52c9
Merge branch 'master' into confetti-plugin
Jermolene May 4, 2023
f9cf576
Merge branch 'master' into confetti-plugin
Jermolene May 10, 2023
87c2fb3
Include confetti plugin in prerelease
Jermolene May 10, 2023
36041cf
Clarify wording of confetti demo
Jermolene May 10, 2023
1c3dd6b
Don't link TiddlyWiki in the tour panel
Jermolene May 10, 2023
62d0c19
Tweaks to tour buttons
Jermolene May 10, 2023
8fd4da6
Mark dependents of the tour plugin
Jermolene May 29, 2023
40fd941
Merge branch 'master' into confetti-plugin
Jermolene Jun 1, 2023
9d2bab0
Merge branch 'master' into confetti-plugin
Jermolene Jun 1, 2023
d419161
Merge branch 'master' into confetti-plugin
Jermolene Jul 20, 2023
1aef840
Add full screen section of tour and tour edition
Jermolene Jul 20, 2023
cf9864e
Remove Anna Freud references from welcome tiddler
Jermolene Jul 20, 2023
abcd2f1
Build the tour edition in the preview
Jermolene Jul 20, 2023
080ca5e
Fix typo in build script
Jermolene Jul 20, 2023
3d0a015
Populate tour edition with solar system data
Jermolene Jul 20, 2023
1721203
Missing tag
Jermolene Jul 20, 2023
0c5c673
Merge branch 'master' into confetti-plugin
Jermolene Aug 21, 2023
d29ed6a
Merge branch 'master' into confetti-plugin
Jermolene Aug 30, 2023
d332baa
Merge branch 'master' into confetti-plugin
Jermolene Sep 9, 2023
d28cf74
Add page control button to start tour
Jermolene Sep 10, 2023
c9d8806
Refactor to use global procedures to control the tour
Jermolene Sep 10, 2023
d2fbbc4
Change "startup-actions" field to "enter-actions" to avoid confusion
Jermolene Sep 10, 2023
4f026e4
Add a tour logo
Jermolene Sep 10, 2023
dd9b4dc
Refactor to allow multiple tours to be loaded at once
Jermolene Sep 10, 2023
701a038
Remove wikification from welcome tour step
Jermolene Sep 10, 2023
a4d74be
Update docs
Jermolene Sep 10, 2023
0656580
Simplify styles for top bar
Jermolene Sep 10, 2023
06af391
Tours should have a $:/tags/Tour tag
Jermolene Sep 10, 2023
4792d24
Tour should autostart in the tour edition, but not in the main wiki
Jermolene Sep 10, 2023
783a5be
Better labelling for the main preview
Jermolene Sep 11, 2023
943dcd7
Fix build process
Jermolene Sep 11, 2023
4e938fa
Merge branch 'master' into confetti-plugin
Jermolene Sep 11, 2023
7c619da
Merge branch 'master' into confetti-plugin
Jermolene Sep 20, 2023
804e253
Remove obsolete text
Jermolene Sep 20, 2023
7b17015
Add "using tags" as a separate tour
Jermolene Sep 20, 2023
c7cac0f
Remove old debugging code
Jermolene Sep 20, 2023
6088fd7
Add tour chooser
Jermolene Sep 21, 2023
4ef8ce3
Ensure that the current tour isn't listed as an option in the final step
Jermolene Sep 21, 2023
ef5b3a8
Use whitespace trim
Jermolene Sep 21, 2023
d460f9f
Simplify tour step format
Jermolene Sep 22, 2023
5a4470e
Remove obsolete state tiddler
Jermolene Sep 22, 2023
5ea2243
Fix gap between navigation buttons
Jermolene Sep 22, 2023
455a51f
Merge branch 'master' into confetti-plugin
Jermolene Sep 27, 2023
44d3228
Clean up tiddler titles within the introduction tour
Jermolene Sep 27, 2023
184e30a
Finish allowing the name "TiddlyWiki" to be customised
Jermolene Sep 27, 2023
c3167d5
Clarify docs
Jermolene Sep 29, 2023
1c6fba6
Merge branch 'master' into confetti-plugin
Jermolene Oct 3, 2023
b1eece2
Add a settings pane giving a birds eye view of a tour
Jermolene Oct 3, 2023
29575d0
Avoid having to embed confetti in the final step
Jermolene Oct 3, 2023
3254684
Update docs
Jermolene Oct 3, 2023
1351109
Tweak styling of tour chooser dropdown
Jermolene Oct 3, 2023
0213f1a
Add a button to launch tour steps directly, and give them captions
Jermolene Oct 5, 2023
aa3f931
Expose custom tour settings
Jermolene Oct 5, 2023
6f46775
Use the tour step caption as the heading
Jermolene Oct 5, 2023
906cb8f
Fix initialisation when jumping to a tour step
Jermolene Oct 5, 2023
9b6570f
Introduce step about tags
Jermolene Oct 12, 2023
9eac359
Improve wording
Jermolene Oct 13, 2023
cd2b375
Improve styling of task call-to-action and nav buttons
Jermolene Oct 13, 2023
80c52d0
Merge branch 'master' into confetti-plugin
Jermolene Oct 14, 2023
94e27cc
Adopt new conditional shortcut syntax
Jermolene Oct 15, 2023
343839b
Wording and ordering tweaks
Jermolene Oct 15, 2023
fd5c073
Fix typos
Jermolene Oct 16, 2023
b8fdb32
Merge branch 'master' into confetti-plugin
Jermolene Oct 16, 2023
d7a58a0
Merge branch 'master' into confetti-plugin
Jermolene Oct 16, 2023
10fad32
Merge branch 'master' into confetti-plugin
Jermolene Oct 17, 2023
a2f4e71
Simplify styling of tour overlay
Jermolene Oct 17, 2023
518c23d
Use custom palette colours
Jermolene Oct 17, 2023
e40b83f
More custom colours
Jermolene Oct 19, 2023
547582c
Tour wording tweaks
Jermolene Oct 24, 2023
a7d469a
Extends the tour plugin with a condition field (#7861)
saqimtiaz Dec 6, 2023
0710054
WIP
Jermolene Jan 25, 2024
535581c
Merge branch 'master' into confetti-plugin
Jermolene Jan 25, 2024
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22 changes: 22 additions & 0 deletions bin/build-site.sh
Original file line number Diff line number Diff line change
Expand Up @@ -156,6 +156,28 @@ node $TW5_BUILD_TIDDLYWIKI \
--build index favicon static \
|| exit 1

# /tour.html tour edition
node $TW5_BUILD_TIDDLYWIKI \
./editions/tour \
--verbose \
--output $TW5_BUILD_OUTPUT \
--rendertiddler $:/core/save/all tour.html text/plain \
|| exit 1

# /dev/index.html Developer docs
# /dev/favicon.ico Favicon for dev site
# /dev/static.html Static rendering of default tiddlers
# /dev/alltiddlers.html Static rendering of all tiddlers
# /dev/static/* Static single tiddlers
# /dev/static/static.css Static stylesheet
node $TW5_BUILD_TIDDLYWIKI \
./editions/dev \
--verbose \
--load $TW5_BUILD_OUTPUT/build.tid \
--output $TW5_BUILD_OUTPUT/dev \
--build index favicon static \
|| exit 1

# /share.html Custom edition for sharing via the URL
node $TW5_BUILD_TIDDLYWIKI \
./editions/share \
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5 changes: 4 additions & 1 deletion editions/prerelease/tiddlywiki.info
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Expand Up @@ -14,7 +14,10 @@
"tiddlywiki/dynannotate",
"tiddlywiki/codemirror",
"tiddlywiki/menubar",
"tiddlywiki/jszip"
"tiddlywiki/jszip",
"tiddlywiki/confetti",
"tiddlywiki/dynannotate",
"tiddlywiki/tour"
],
"themes": [
"tiddlywiki/vanilla",
Expand Down
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title: Asteroid (253) Mathilde Image
type: image/png
tags: Image
17 changes: 17 additions & 0 deletions editions/tour/tiddlers/Solar System/Asteroid.tid
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created: 20230720112554020
modified: 20230720112827830
title: Asteroid
type: text/vnd.tiddlywiki
tags: [[Solar System]]

[img class=hero-image [Asteroid (253) Mathilde Image]]

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.

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.

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.

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).

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.
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3 changes: 3 additions & 0 deletions editions/tour/tiddlers/Solar System/Comet Image.png.meta
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title: Comet Image
type: image/png
tags: Image
15 changes: 15 additions & 0 deletions editions/tour/tiddlers/Solar System/Comet.tid
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created: 20230720113501352
modified: 20230720113633994
title: Comet
type: text/vnd.tiddlywiki
tags: [[Solar System]]

[img class=hero-image [Comet Image]]

A comet is a ball of mostly ice that moves around in outer space. Comets are often described as "dirty snowballs". They are very different from [[asteroids|Asteroid]]. The orbital inclinations of comets are usually high and not near the ecliptic where most [[solar system|Solar System]] objects are found. Most of them are long-period comets and come from the [[Kuiper belt]]. That is very far away from the [[Sun]], but some of them also come near enough to [[Earth]] for us to see at night.

They have long "tails", because the [[Sun]] melts the ice. A comet's tail does not trail behind it, but points directly away from the [[Sun]], because it is blown by the solar wind. The hard centre of the comet is the nucleus. It is one of the blackest things (lowest albedo) in the [[solar system|Solar System]]. When light shone on the nucleus of Halley's Comet, the comet reflected only 4% of the light back to us.

Periodic comets visit again and again. Non-periodic or single-apparition comets visit only once.

Comets sometimes break up, as Comet Biela did in the 19th century. Comet Shoemaker-Levy 9 broke up, and the pieces hit [[Jupiter]] in 1994. Some comets orbit (go around) together in groups. Astronomers think these comets are broken pieces that used to be one object.
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3 changes: 3 additions & 0 deletions editions/tour/tiddlers/Solar System/Earth Image.png.meta
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title: Earth Image
type: image/png
tags: Image
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title: Earth's Moon Image
type: image/png
tags: Image
10 changes: 10 additions & 0 deletions editions/tour/tiddlers/Solar System/Earth's Moon.tid
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created: 20230720105302348
modified: 20230720105451528
title: Earth's Moon
type: text/vnd.tiddlywiki

[img class=hero-image [Earth's Moon Image]]

The Moon is [[Earth]]'s only natural satellite. We usually see it in the night sky and also during the day. Some other planets also have moons or natural satellites.

Our moon is about one-fourth of the width of the [[Earth]]. Because it is far away it looks small, about half a degree wide. The gravity on the moon is one-sixth of the [[Earth]]'s gravity. It means that something will be one-sixth as heavy on the Moon than on [[Earth]]. The Moon is a rocky and dusty place. It moves slowly away from the [[Earth]] at a rate of 3.8 cm per year, due to the effect of tidal dissipation.
21 changes: 21 additions & 0 deletions editions/tour/tiddlers/Solar System/Earth.tid
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created: 20230720102439731
modified: 20230720105223869
title: Earth
type: text/vnd.tiddlywiki
tags: Planet [[Rocky]]

[img class=hero-image [Earth Image]]

Earth is the third planet from the [[Sun]] in the [[Solar System]]. It is the only planet known to have life on it. The Earth formed about 4.5 billion years ago. It is one of four rocky planets on the inner side of the [[Solar System]]. The other three are [[Mercury]], [[Venus]], and [[Mars]].

The large mass of the [[Sun]] keeps the Earth in orbit through the force of gravity. Earth also turns around in space, so that different parts face the Sun at different times. Earth goes around the [[Sun]] once (one year) for every 365​1⁄4 times it turns around (one day).

Earth is the only planet in the [[Solar System]] that has a large amount of liquid water on its surface. About 74% of the surface of Earth is covered by liquid or frozen water. Because of this, people sometimes call it the blue planet.

Because of its water, Earth is home to millions of species of plants and animals which need water to survive. The things that live on Earth have changed its surface greatly. For example, early cyanobacteria changed the air and gave it oxygen. The living part of Earth's surface is called the "biosphere".

Earth is one of the eight planets in the [[Solar System]]. There are also thousands of small bodies which move around the [[Sun]]. The [[Solar System]] is moving through the Orion Arm of the [[Milky Way]] galaxy, and will be for about the next 10,000 years.

Earth is about 150,000,000 kilometres or 93,000,000 miles away from the [[Sun]] (this distance is called an "Astronomical Unit"). It moves on its orbit at an average speed of about 30 km/s (19 mi/s). Earth turns all the way around about 365​1⁄4 times in the time it takes for Earth to go all the way around the [[Sun]]. To make up this extra bit of a day every year, an additional day is used every four years. This is named a "leap year".

The [[Moon|Earth's Moon]] goes around Earth at an average distance of 400,000 kilometres or 250,000 miles. It is locked to Earth, so that it always has the same half facing Earth; the other half is called the "dark side of the moon". It takes about 27​1⁄3 days for the [[Moon|Earth's Moon]] to go all the way around Earth, but because Earth is moving around the [[Sun]] at the same time, it takes about 29​1⁄2 days for the [[Moon|Earth's Moon]] to go from dark to bright to dark again. This is where the word "month" came from, even though most months now have 30 or 31 days.
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3 changes: 3 additions & 0 deletions editions/tour/tiddlers/Solar System/Jupiter Image.png.meta
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title: Jupiter Image
type: image/png
tags: Image
15 changes: 15 additions & 0 deletions editions/tour/tiddlers/Solar System/Jupiter.tid
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created: 20230720103949854
modified: 20230720104126047
title: Jupiter
type: text/vnd.tiddlywiki
tags: Planet [[Gas Giant]]

[img class=hero-image [Jupiter Image]]

Jupiter is the largest planet in the [[Solar System]]. It is the fifth planet from the [[Sun]]. Jupiter is a gas giant because it is so large, and made mostly of gas. The other gas giants in the Solar System are [[Saturn]], [[Uranus]], and [[Neptune]].

Jupiter's mass is about 318 times the mass of [[Earth]]. This is more than twice the mass of all the other planets in the [[Solar System]] put together.

Jupiter can be seen even without using a telescope. It is the third brightest object in the night sky. Only the [[Earth's Moon]] and [[Venus]] are brighter. The ancient Romans named the planet after their King of the Gods, Jupiter (Latin: Iuppiter).

Jupiter has 95 known moons. About 75 of them are very small—less than five kilometres wide. The four largest moons of Jupiter are Io, Europa, Ganymede, and Callisto. They are called the Galilean moons because Galileo Galilei discovered them. Ganymede is the largest moon in the Solar System. Its diameter is larger than that of the planet [[Mercury]].
12 changes: 12 additions & 0 deletions editions/tour/tiddlers/Solar System/Kuiper belt.tid
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created: 20230720113703253
modified: 20230720113733279
title: Kuiper belt
type: text/vnd.tiddlywiki

The Kuiper belt is an area of the [[Solar System]] beyond the orbit of [[Neptune]] (at 30 astronomical units) to 50 AU from the [[Sun]].

The objects within the Kuiper Belt together with the members of the scattered disk beyond, are together called trans-Neptunian.

Many objects such as dwarf planets in the Kuiper belt are much bigger than the ones in the asteroid belt and are round. At least some Kuiper belt objects are icebound.

The first objects in the Kuiper belt to be found were [[Pluto]] and Charon (moon) but the belt was only identified and named in 1992 when more Kuiper belt objects (KBOs) were found. A few thousand have since been discovered and more than 70,000 KBOs over 100 km (62 mi) in diameter are thought to exist.
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5 changes: 5 additions & 0 deletions editions/tour/tiddlers/Solar System/Mars Image.png.meta
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created: 20230720103818354
modified: 20230720103822277
title: Mars Image
type: image/png
tags: Image
11 changes: 11 additions & 0 deletions editions/tour/tiddlers/Solar System/Mars.tid
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created: 20230720103800905
modified: 20230720103915592
title: Mars
type: text/vnd.tiddlywiki
tags: Planet [[Rocky]]

[img class=hero-image [Mars Image]]

Mars is the fourth planet from the [[Sun]] in the [[Solar System]] and the second-smallest planet. Mars is a terrestrial planet with polar ice caps of frozen water and carbon dioxide. It has the largest volcano in the [[Solar System]], and some very large impact craters. Mars is named after the mythological Roman god of war because it appears of red color.

Space probes such as the Viking program landers are the main tools for the exploration of Mars.
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3 changes: 3 additions & 0 deletions editions/tour/tiddlers/Solar System/Mercury Image.png.meta
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title: Mercury Image
type: image/png
tags: Image
21 changes: 21 additions & 0 deletions editions/tour/tiddlers/Solar System/Mercury.tid
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created: 20230720101415532
modified: 20230720101809366
title: Mercury
type: text/vnd.tiddlywiki
tags: Planet [[Rocky]]

[img class=hero-image [Mercury Image]]

Mercury is the smallest planet in the [[Solar System]]. It is the closest planet to the [[Sun]]. It makes one trip around the Sun once every 87.969 days.

Mercury is bright when we can see it from [[Earth]]. It has an apparent magnitude ranging from −2.0 to 5.5. It cannot be seen easily because it is usually too close to the [[Sun]]. Because of this, Mercury can only be seen in the morning or evening twilight or when there is a solar eclipse.

Less is known about Mercury than about other planets of our [[Solar System]]. Even with telescopes only a small, bright crescent can be seen. It is also hard to put a satellite in orbit around it. Two spacecraft have visited Mercury. The first one was Mariner 10. It only made a map of about 45% of the Mercury's surface from 1974 to 1975. The second is the MESSENGER spacecraft, which finished mapping Mercury in March 2013.

Mercury looks like [[Earth's Moon]]. It has many craters and smooth plains. It has no moons and little atmosphere as we know it. However, Mercury does have an extremely thin atmosphere, known as an exosphere. Mercury has a large iron core. Because of this Mercury has a magnetic field about 1% as strong as that of the Earth. It is a very dense planet because its core is large.

Temperature at the surface can be anywhere from about 90 to 700 K (−183 °C to 427 °C, −297 °F to 801 °F), with the subsolar point being the hottest and the bottoms of craters near the poles being the coldest.

Known sightings of Mercury date back to at least the first millennium BC. Before the 4th century BC, Greek astronomers thought that Mercury was two different objects: The one that they were only able at sunrise, they called Apollo; the other one that they were only able to see at sunset, they called Hermes. The English name for the planet is from the Romans, who named it after the Roman god Mercury. The symbol for Mercury is based on Hermes' staff.

Even though Mercury is the closest planet to the [[Sun]], it is not the hottest. This is because it has no greenhouse effect. The heat that the [[Sun]] gives it, quickly escapes into space. The hottest planet is [[Venus]].
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5 changes: 5 additions & 0 deletions editions/tour/tiddlers/Solar System/Milky Way Image.png.meta
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created: 20230720095228607
modified: 20230720095237609
title: Milky Way Image
type: image/png
tags: Image
14 changes: 14 additions & 0 deletions editions/tour/tiddlers/Solar System/Milky Way.tid
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created: 20230720095039202
modified: 20230720095530636
title: Milky Way
type: text/vnd.tiddlywiki

[img class=hero-image [Milky Way Image]]

The Milky Way is our home galaxy. It contains around 400 billion stars, including our [[Sun]].

The Milky Way has a diameter of about 170,000 or 200,000 light years, and is a barred spiral galaxy. The idea that the Milky Way is made of stars goes back to the Ancient Greek philosopher Democritus.

The Milky Way has three main parts: a disk, where the [[Solar System]] is, a bulge at the core, and an outer halo all around it. Although the word "disk" suggests it is flat, the Milky Way is actually not quite flat. It is slightly warped and twisted.

This galaxy belongs to the Local Group of three large galaxies and over 50 smaller galaxies. The Milky Way is one of the largest galaxies in the group, second to the Andromeda Galaxy. Its closest neighbour is the Canis Major Dwarf Galaxy, which is about 25,000 light years away from the Earth. The Andromeda Galaxy is moving towards the Milky Way Galaxy, and will collide with it in about 3.75 billion years. The Andromeda Galaxy moves with a speed of about 1,800 kilometres per minute.
9 changes: 9 additions & 0 deletions editions/tour/tiddlers/Solar System/Moon.tid
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created: 20230720113324534
modified: 20230720113416564
title: Moon
type: text/vnd.tiddlywiki
tags: [[Solar System]]

Bodies which orbit [[planets|Planet]] are called moons. They vary in size. The [[Earth]] has only one moon. Some other planets have many moons, and some have none. When people write just "the moon", they are usually talking about the moon of the Earth. [[Earth's Moon]] is written with a capital letter, Moon. The Latin word for the moon is luna, which is why the adjective used to talk about the moon is "lunar". For example, lunar eclipse.

Anything that goes around a planet is called a satellite. Moons are natural satellites. People also use rockets to send machines into orbit around the Earth. These machines are called artificial (man-made) satellites.
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3 changes: 3 additions & 0 deletions editions/tour/tiddlers/Solar System/Neptune Image.png.meta
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title: Neptune Image
type: image/png
tags: Image
19 changes: 19 additions & 0 deletions editions/tour/tiddlers/Solar System/Neptune.tid
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created: 20230720104752241
modified: 20230720104941305
title: Neptune
type: text/vnd.tiddlywiki
tags: Planet [[Gas Giant]]

[img class=hero-image [Neptune Image]]

Neptune is the eighth and farthest planet from the [[Sun]] in the [[Solar System]]. It is an ice giant. It is the fourth-largest planet in the system. Neptune has five rings. These rings are hard to see from the [[Earth]].

Neptune's mass is 17 times [[Earth]]'s mass and a little bit more than [[Uranus]]' mass. Neptune is denser and smaller than [[Uranus]]. Its greater mass makes its gravity make its atmosphere smaller and denser.

It was named after the Roman god of the sea, Neptune. Neptune's astronomical symbol is ♆, the trident of the god Neptune.

Neptune's atmosphere is mostly hydrogen and helium. It also contains small amounts of methane which makes the planet appear blue. Neptune's blue color is much darker than the color of [[Uranus]]. Neptune also has the strongest winds of any planet in the [[Solar System]], as high as 2,100 km/h or 1,300 mph.

Urbain Le Verrier and John Couch Adams were the astronomers who discovered Neptune. Neptune was not discovered using a telescope. It was the first planet to be discovered using mathematics. In 1821, astronomers saw that [[Uranus]]' orbit was different from what they expected. Another nearby planet's mass was changing [[Uranus]]' orbit. They found Neptune was the cause.

Voyager 2 visited Neptune on 25 August 1989. It was the only spacecraft to visit the planet. Neptune used to have a huge storm known as the "Great Dark Spot". Voyager 2 discovered the spot in 1989. The dark spot was not seen in 1994, but new spots were found since then. It is not known why the dark spot disappeared. Visits by other space probes have been planned.
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title: Planet Image
type: image/png
tags: Image
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created: 20230720112945287
modified: 20230720113139369
title: Planet
type: text/vnd.tiddlywiki
tags: [[Solar System]]

[img class=hero-image [Planet Image]]

A planet is a large object such as [[Venus]] or [[Earth]] that orbits a star. Planets are smaller than stars, and they do not make light. [[Jupiter]] is the biggest planet in the [[Solar System]], while the smallest planet in the [[Solar System]] is [[Mercury]].

Planets are shaped like a slightly squashed ball (called a spheroid). Objects that orbit planets are called satellites. A star and everything which orbits it are called a star system.

There are eight planets in the [[Solar System]]. [[Pluto]] used to be called a planet, but in August 2006, the International Astronomical Union decided it was a dwarf planet instead. There are four more known dwarf planets in the [[Solar System]], Ceres, Makemake, Eris and Haumea.

The name "planet" is from the Greek word πλανήτης (planetes), meaning "wanderers", or "things that move". Until the 1990s, people only knew the planets in the [[Solar System]].

4,905 extrasolar planets (exoplanets) have been discovered in 3,629 planetary systems (January 2022 data). The count includes 808 multi-planetary systems. Known exoplanets range in size from gas giants about twice as large as Jupiter down to just over the size of the [[Moon|Earth's Moon]]. About 100 of these planets are roughly the size as [[Earth]]. Nine of these orbit in the habitable zone of their star.
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title: Pluto Image
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