Add-on submissions

[levinli303]

Submit your add-ons in this issue, thanks for your contribution! Submission template:

**Title:**
**Description:** (a short description to be shown on the addon download window)
**Proposed category:** (pick one of the existing categories (https://celestia.mobi/resources/), or suggest a new one)
**Demo Object Name:** (optional, the name of the main object used for Go to command)
**Author(s):**
**Release date:** (The date this add-on is released. If left empty, will be the date the add-on is uploaded here)
**Link to download:** (Please use zip to package the addon)
**Image:** (optional, no UI control element, HUD display, label. Avoid using "tall" pictures (height > width))
**Thumbnail:** (optional, by default will be the downscaled version of Image if present, so unless you want something different to show as a thumbnail, leave it empty)
**Additional metadata:** (optional, this can be anything that web supports. Link, image, audio, video, text, attributed text, cel URL, cel/celx scripts, embedded stuff (for example a YouTube video)...)

For updates to existing add-ons, please attach the id to the add-on and only include updated fields from the template. For removal of add-ons, please attach the id too.

The id is part of the link to the add-on: For example, this addon below has an id of A4577B17-4C60-0C1E-CAB5-92A604FF0EC3 https://celestia.mobi/resources/item?item=A4577B17-4C60-0C1E-CAB5-92A604FF0EC3

Check before uploading an add-on

Your add-on will be running on Android/iOS/macOS/Windows, to enable maximum compatibility, please ensure that

1. files names referenced in models, ssc, dsc files, etc are exactly the same as the actual file names (some file systems are case sensitive. For example if in your .ssc there is Mesh "Progress.cmod", then the file name should be exactly Progress.cmod not progress.cmod).
2. Textures should have width/height of power of 2 (for example: 1024 512, a texture of 1000 500 will not work on many mobile devices).
3. If your add-on requires specific Celestia versions, please mention in the description. Please also ensure that your add-on should not crash running on other versions.
4. If you are updating an existing add-on, note that existing users will not see an update button, so it might be a good idea to include version history in the description.
5. Please try to use smaller files for image/thumbnail/other metadata. For example, use JPG if alpha value is not needed.

Example:

Title: Kepler-1649 Description: The Kepler-1649 planetary system, which is a red dwarf star orbited by a Venus-analogue and an Earth-analogue. Alternate surfaces for planet c are included. Proposed category: Exoplanets Demo Object Name: Kepler-1649/c Author(s): SevenSpheres Release date: 2020-07-16 Link to download: Kepler-1649.zip Image:

[DaveBowman2001]

Title: WASP-11 Description: WASP-11, also known as HAT-P-10, is a binary star system comprising of a K-type main-sequence star and a red dwarf about 408.1 light-years away from the constellation Aries. A Jupiter-sized planet completes an orbit around the primary star once every 3.7 days Proposed category: Exoplanets (Early Years, 1988 ~ 2008) Demo Object Name: WASP-11 A Author(s): Edasich Release date: 2009-Jun-4 Link to download: WASP-11.zip Image: Additional metadata: Size comparison of WASP-11 b and Jupiter

[DaveBowman2001]

Title: HAT-P-18 Description: HAT-P-18, also known as TOI-2127, is a K-type main-sequence star about 528.9 light-years away in the constellation Hercules. A Jupiter-sized planet completes a retrograde orbit around its star once every 5.3 days Proposed category: Exoplanets (Kepler Era, 2009 ~ 2017) Demo Object Name: HAT-P-18 Author(s): Edasich Release date: 2009-Nov-16 Link to download: HAT-P-18.zip Image: Additional metadata: Size comparison of HAT-P-18 b and Jupiter

[levinli303]

I've added paging support for web. For example, you can check this page where you can scroll down to see a page 2 option. https://celestia.mobi/resources/category?category=413228EC-051A-D8EE-5E6D-F883A4953F26

to opt out of paging, you can add page=0

For example: https://celestia.mobi/resources/category?category=413228EC-051A-D8EE-5E6D-F883A4953F26&page=0

[SpaceExplorer2008]

Title: Luna 9 Description: Luna 9 was a soviet space probe intended to land on the surface of the Moon. Launched on January 31, 1966, it landed gently on the Moon on February 3, 1966 and became the first successful Moon landing. The probe took photographs from the surface of the Moon until three days after its landing. The last contact with the probe took place on February 6, 1966. Proposed Category: Spacecraft (1951 ~ 2000) Demo Object Name: Luna 9 Author(s): Jack Higgins Release date: 2008-06-07 Link to download: luna 9.zip Image:

Additional Metadata: Photograph of the Moon's surface by Luna 9, February 1966.

[SpaceExplorer2008]

Title: Uranus's Largest Moons Description: This addon adds textures for the five largest moons of the planet Uranus: Miranda, Ariel, Umbriel, Titania and Oberon. Proposed Category: Planets and Moons Demo Object Name: N/A Author(s): Snowfall-The-Cat, FarGetaNik Release date: 2017-07-03 Link to download: uranusmoons.zip Images:

[SpaceExplorer2008]

ADDON UPDATE: Added full MESSENGER trajectory around Mercury between 2011 and 2015 for more accuracy, plus description update and added metadata.

Description: MESSENGER was a NASA space probe with the aim of studying the planet Mercury. Launched on August 3, 2004, it passed once by Earth, twice by Venus and three times by Mercury before entering Mercury's orbit in March 18, 2011. MESSENGER studied and photographed Mercury until April 30, 2015, when its fuel ran out and the probe crashed into the planet's surface. Link to download: MESSENGER.zip

Additional Metadata:

MESSENGER being prepared for launch, 2004

MESSENGER launch aboard the Delta II rocket, August 3, 2004

Earth photographed by MESSENGER during flyby in August 2005

Venus photographed by MESSENGER during its second flyby of the planet, 2007

Mercury photographed by MESSENGER during its second flyby of the planet in October 2008

First photo of Mercury taken after successful orbital insertion, March 2011

[DaveBowman2001]

Update to Sputnik-1, its name now disappears on the date of last contact (1957-Oct-26). Also a proposal to rename this addon into Sputnik 1

Title: Sputnik 1 Description: Sputnik 1 was a Soviet satellite and the first to be placed in Earth orbit, starting the Space Age. Launched on 1957-Oct-4, it continued to broadcast signals to Earth for 22 days before it went silent thereafter. It reentered the Earth's atmosphere on January 1958. Link to download: Sputnik 1.zip Image:

[DaveBowman2001]

Title: Sputnik 2 Description: Sputnik 2 was the second spacecraft ever sent into orbit, and the first one to carry a living animal in space, a dog named Laika, on 1957-Nov-3. However, the spacecraft was not designed to return to Earth, and Laika tragically died on the satellite's fourth orbit. The satellite continued its operations until the batteries depleted on 1957-Nov-10, before reentering the atmosphere on April 1958 Proposed category: Spacecraft (1951 ~ 2000) Demo Object Name: Sputnik 2 Author(s): linuxman Release date: 2008-Aug-21 Link to download: Sputnik 2.zip Image: Additional metadata: Launch on an R-7 rocket, 1957-Nov-3

The first living creature in orbit, Laika

[DaveBowman2001]

Title: Sputnik 3 Description: Sputnik 3 was a Soviet scientific satellite launched on 1958-May-15 from Baikonur Cosmodrome by a modified R-7 rocket. It carried a large array of instruments for geophysical research of the upper atmosphere and near space. Sputnik 3 was actually planned to be the first satellite to be sent into space, but complications in its development led to the construction of the much simpler Sputnik 1. It operated in orbit for six weeks, before falling back and reentering the atmosphere just 692 days after launch in April 1960 Proposed category: Spacecraft (1951 ~ 2000) Demo Object Name: Sputnik 3 Author(s): linuxman Release date: 2006-Nov-20 Link to download: Sputnik 3.zip Image:

[DaveBowman2001]

Title: Gliese 581 (Disproven Planets) Description: This addon adds the three additional planets (d, f, g) of Gliese 581 which has been disproven by follow-up studies after their reported discoveries. This includes the two former potentially habitable planet candidates d and g, which are now attributed to stellar activity rather than actual planet signals

(NOTE: See the Exoplanets (Early Years, 1988 ~ 2008) category for this star system's confirmed planets b, c, and e)

Proposed category: Hypothetical & Disproven Demo Object Name: Gliese 581 Author(s): John van Vliet Release date: 2011-Jun-7 Link to download: Gliese 581 (Disproven).zip Image:

[DaveBowman2001]

Title: Tiangong Space Station Description: Tiangong is a modular space station currently being constructed by China in LEO starting from the launch of Tianhe on 2021-Apr-29. Once completed, it will have an orbital mass of 60-100 tons, roughly about 1/5 the mass of the ISS and have the same size as Mir. As of March 2022, there are two long-term Shenzhou expeditions have stayed aboard the station, with the second one becoming the first six-month long mission by the CNSA

(NOTE: This should not be confused with the earlier Tiangong 1 and 2, which served as space station testbeds for China from 2011 to 2019)

Proposed category: Spacecraft (2021 ~ Present) Demo Object Name: Tianhe Author(s): Thomas Tarrants (Sirius_Alpha) Release date: 2021-Aug-28 Link to download: Tiangong Space Station.zip Image: Additional metadata: Live: Special coverage on China's first space station mission - YouTube

[DaveBowman2001]

Quick Update to Tiangong Space Station above, forgot to notice the textures were npot.

Link to download: Tiangong Space Station.zip

[DaveBowman2001]

Title: TOI-237 Description: TOI-237 is a red dwarf about 124.31 light-years away in the constellation Sculptor. One confirmed superterran planet orbits the star once every 11.16 days Proposed category: Exoplanets (TESS Era, 2018 ~ Present) Demo Object Name: TOI-237 Author(s): Betegelge Release date: 2021-Dec-29 Link to download: TOI-237.zip Image:

[SpaceExplorer2008]

@DaveBowman2001 I would like to suggest you, to create a smaller version of the ISS addon. The current one is very good, but due to the huge amount of textures it has strong crashes. On my smartphone, I had to delete all the normal map textures from the ISS addon so it wouldn't crash and close Celestia. But for even weaker devices, it will appear that you could limit around just 20 MB of textures in the entire addon. Crashing problems do not usually occur because of the 3D models, but because of the textures. If you do, keep the old addon, and this new reduced version as an alternate addon.

[SpaceExplorer2008]

Title: Luna 10 Description: Luna 10 was a soviet space probe launched on March 31, 1966 towards the Moon. On April 3, 1966, Luna 10 became the first space probe to orbit the Moon. The probe performed 460 orbits around the Moon until the communication was lost on May 30, 1966. What happened after that is uncertain, it is not possible to know if the probe collided with the lunar surface or stayed in orbit much longer. Proposed Category: Spacecraft (1951 ~ 2000) Demo Object Name: Luna 10 Author(s): DaveBowman2001 Release date: 2021-06-07 Link to download: Luna 10 Image:

[DaveBowman2001]

Title: Tiangong 1 and 2 Description: Tiangong 1 and Tiangong 2 were the first space stations operated by China. Like the Salyut series before Mir, they served as testbeds for the modular space station simply named Tiangong, which was launched in 2021. Three Shenzhou missions were launched to Tiangong 1, while one Shenzhou mission was conducted on Tiangong 2 for 33 days. The two stations operated from 2011 to 2019 Proposed category: Spacecraft (2001 ~ 2020) Demo Object Name: N/A Author(s): Thomas Tarrants (Sirius_Alpha), DaveBowman2001 Release date: 2021-Aug-18 Link to download: Tiangong 1 and 2.zip Image:

[DaveBowman2001]

I would like to suggest you, to create a smaller version of the ISS addon. The current one is very good, but due to the huge amount of textures it has strong crashes.

I'll see if I could make the textures smaller on the next update, but it is not guaranteed if it will be as small as 20 MB

[SpaceExplorer2008]

@DaveBowman2001 Everything is fine. Just try as much as possible.

Title: Luna 13 Description: Luna 13 was a soviet space probe launched on December 21, 1966. The probe successfully landed on the Moon on December 24, 1966 and operated for December 28, 1966 until communication was lost. Proposed Category: Spacecraft (1951 ~ 2000) Demo Object Name: Luna 13 Author(s): Jack Higgins Release date: 2008-06-07 Link to download: Luna 13 Image:

[DaveBowman2001]

Title: Luna 19 and 22 Description: Luna 19 and Luna 22 were the twin Soviet spacecraft that mapped the lunar surface in 1971-1972 and 1974-1975 respectively. They were basically Lunokhod rovers redesigned to become 5.7 ton lunar orbiters, among the heaviest such spacecraft ever launched. They were left derelict in lunar orbit until they crashed somewhere on the lunar surface on unknown dates, presumably at most a year after last contact with Earth Proposed category: Spacecraft (1951 ~ 2000) Demo Object Name: N/A Author(s): DaveBowman2001, linuxman Release date: 2021-Jun-12 Link to download: Luna 19 and 22.zip Image: Additional metadata: The Moon as seen by Luna 19, 1972

The Moon as seen by Luna 22, 1975

[DaveBowman2001]

Title: Luna 17 and 21 Description: Luna 17 and Luna 21 were the two Soviet lunar landers that delivered the two Lunokhod rovers in 1971 and 1973. Originally designed to support the Soviet human Moon missions, they were repurposed for fully robotic explorations, the first ones to move on the surface of an extraterrestrial body. Although both lost contact with Earth at the end of their missions, the retroreflectors mounted on top of the rovers is still used to this day, primarily to precisely measure the distance of the Moon from the Earth. Proposed category: Spacecraft (1951 ~ 2000) Demo Object Name: N/A Author(s): linuxman Release date: 2007-Jan-21 Link to download: Luna 17 and 21.zip Image: Additional metadata: Luna 17 imaged by Lunokhod 1, 1970

Mare Imbrium as seen by Lunokhod 1, 1970

The rim of Le Monnier crater as seen by Lunokhod 2, 1973

[DaveBowman2001]

Update for the Mariner 2 addon. Name now disappears on the date of last contact (1963-Jan-3)

Release date: 2008-Aug-12 Link to download: Mariner 2.zip Image: Additional metadata: Final preparations before launch, 1961-Dec-31

Launch on an Atlas-Agena rocket, 1962-Aug-27

[SpaceExplorer2008]

ADDON UPDATES: Minor modifications to spacecraft addons

Updated Mars Global Surveyor addon Link to download: MGS.zip

Updated Mars Odyssey addon Link to download: mars odyssey.zip

Updated Mars Express addon Link to download: mars express.zip

Updated Mars Reconnaissance Orbiter addon Link to download: Mars Reconnaissance Orbiter.zip

Updated MAVEN addon Link to download: MAVEN.zip

Updated ExoMars (Trace Gas Orbiter) addon Link to download: ExoMars.zip

[levinli303]

ok for now, please include add-on id instead of links for add-on updates. id is part of the add-on link see the original post for where the id is. you can keep the link if you want, but the id need to be explicitly visible.

[DaveBowman2001]

Title: Gliese 9482 Description: Gliese 9482, also known as HIP 70849, is a K-type main-sequence star about 78.5 light-years away in the constellation Lupus. A super-Jovian planet is found orbiting about 11 AU from its parent star, alongside a very distant brown dwarf Proposed category: Exoplanets (Kepler Era, 2009 ~ 2017) Demo Object Name: GJ 9482 A Author(s): Trolligi Release date: 2021-Jul-22 Link to download: Gliese 9482.zip Image:

[DaveBowman2001]

Title: TOI-709 Description: TOI-709 is a blue subdwarf star about 4,616.5 light-years away in the constellation Dorado. In 2020, a Neptune-sized planet was detected to orbit this star, however it's existence is yet to be confirmed by follow-up studies in the future Proposed category: Exoplanets (Unconfirmed) Demo Object Name: TOI-709 Author(s): Trolligi Release date: 2021-May-8 Link to download: TOI-709.zip Image:

[DaveBowman2001]

Title: MACHO 120.22303.5389 Description: MACHO 120.22303.5389 is a Sun-like star accompanied by a brown dwarf about 4,418.4 light-years away in the constellation . In 2007, a super-Jovian planet was detected with a 2.4-day long orbit around the star, however its existence is yet to be confirmed by follow-up studies Proposed category: Exoplanets (Unconfirmed) Demo Object Name: MACHO 120.22303.5389 A Author(s): The Minmus Derp Release date: 2021-Jul-8 Link to download: MACHO 120.22303.5389.zip Image:

[DaveBowman2001]

Title: LX Serpentis Description: LX Serpentis, also known as Stepanian's Star, is a contact binary star system consisting of a Sun-like star and a red dwarf about 1,606 light-years away from the constellation Serpens Caput. Due to the close proximity of both stars to each other, it allows a super-Jovian planet to orbit both stars in the system Proposed category: Exoplanets (Kepler Era, 2009 ~ 2017) Demo Object Name: LX Ser Author(s): The Minmus Derp Release date: 2021-Jul-7 Link to download: LX Serpentis.zip Image:

[levinli303]

let's actually set a limit on number of add-ons submitted per day before we support paging on iOS/android. and also... save for the future....

[levinli303]

@levinli303 If so, where do I find the addon ID?

the guide is updated:

The id is part of the link to the add-on: For example, this addon below has an id of A4577B17-4C60-0C1E-CAB5-92A604FF0EC3 https://celestia.mobi/resources/item?item=A4577B17-4C60-0C1E-CAB5-92A604FF0EC3

[SpaceExplorer2008]

ok

[SpaceExplorer2008]

@levinli303 Like that? If you're right, you can now be sent to Celestia:

Updated Venus Express addon ID: 2882017D-E666-93AF-BA49 Link to download: venus express.zip

[levinli303]

yes, but the ID your provided is incorrect. it should be 2882017D-E666-93AF-BA49-17E33B4F9B71

[SpaceExplorer2008]

ADDON UPDATES:

Updated Lunar Orbiter addon ID: 3800A29B-9CC8-BDA6-2A62-5DD27A967755 Link to download: lunar orbiter.zip

Updated Lunar Prospector addon ID: B99BC6E7-A035-6BA2-CA65-B7F9DA2BEDD1 Link to download: lunar prospector.zip

Updated Mariner 2 addon ID: CBD4B0E2-F359-F4F2-606E-B0D3E5996781 Link to download: Mariner 2.zip

[DaveBowman2001]

ADDON UPDATES: Lunar Orbiter, Lunar Prospector, Mariner 2

Why did you change the BodyFrame of these spacecraft? The previous versions were coded so that their high-gain antennas are always pointed at Earth, thereby simulating communications. Now they're fully pointed to the Sun instead. I noticed you also did this on the Martian orbiters on this post (on a side note, for now Mars Odyssey does indeed look better if it's pointed fully at the Sun)

[SpaceExplorer2008]

@DaveBowman2001 There's a reason for this: Solar panels at a bad angle. I'll take three examples: Juno, Lucy and Stardust. When gravitational assists by the Earth occur, weeks before closest approach the solar panels are on opposite sides of the sun. Sometimes in the inner Solar System, for spacecraft that didn't have gravitational assists, it still gets bad angles. For spacecraft using RTGs (Pioneer 10/11), Voyager 1/2, New Horizons, Cassini, Galileo or Ulysses the antenna pointed at Earth is an excellent option, as they do not use solar energy.

[DaveBowman2001]

@SpaceExplorer2008, solar panels do not necessarily point directly to the Sun even in real life, as the solar radiation is intense enough (in the case of Juno, the radiation around Jupiter) to significantly degrade the panels' capability to gain power if it were directly pointed towards it. Plus, the phenomena you described is just one of the limitations of Celestia, but it's better if their HGAs are always pointed towards Earth like their counterparts in real life for reasons I've stated in the previous post

[SpaceExplorer2008]

Still, I think the Juno looks a lot better with the solar panels permanently pointed at the Sun. I'll at least update Mariner 2 to the version you provided.

[SpaceExplorer2008]

Mariner 2 addon update. Antennas pointed to Earth again. ID: CBD4B0E2-F359-F4F2-606E-B0D3E5996781 Link to download: Mariner 2.zip

[SpaceExplorer2008]

Title: Surveyor Description: The NASA Surveyor program is a series of seven lunar landers intended to study the surface of the Moon up close from 1966 to 1968. Their findings would later prove to be critical to the eventual success of the Apollo program of landing a man on the moon before the decade of the 60s is out. Five landers successfully touched down and relayed data back to Earth, of which one of them (Surveyor 3), is the only spacecraft ever visited by humans (Apollo 12) on an extraterrestrial surface to this day. Proposed Category: Spacecraft (1951 - 2000) Demo Object Name: N/A Author(s): DaveBowman2001 Release date: 2021-03-30 Link to download: Surveyor.zip Image:

Additional Metadata: Surveyor 3 photographed on the Moon on the Apollo 12 mission

Surveyor 3 and astronaut Pete Conrad on the Moon, Apollo 12 mission, November 1969.

[DaveBowman2001]

Title: PDS 70 Description: PDS 70, also known as V1032 Centauri, is a very young K-type T Tauri star about 369.7 light-years away in the constellation Centaurus. The star has a very dense protoplanetary disk with two super-Jovian planets orbiting it, the first one discovered is also the first protoplanet to be directly imaged Proposed category: Exoplanets (Kepler Era, 2009 ~ 2017) Demo Object Name: PDS 70 Author(s): Gurren Lagann Release date: 2021-Apr-22 Link to download: PDS 70.zip Image: Additional metadata: ALMA image of a resolved circumplanetary disk around exoplanet PDS 70c

[DaveBowman2001]

Title: HR 8799 Description: HR 8799 is a young A-type main-sequence star about 134.7 light-years away in the constellation Pegasus. Its system of four super-Jovians and a prominent debris disk is retroactively became the first star system whose orbital motion of its planets were directly imaged, after Fomalhaut b's existence was disproven in 2020 Proposed category: Exoplanets (Early Years, 1988 ~ 2008) Demo Object Name: HR 8799 Author(s): Gurren Lagann Release date: 2021-Jun-20 Link to download: HR 8799.zip Image: Additional metadata: Timelapse of the planets of HR 8799 moving from 2009 to 2016

[DaveBowman2001]

Title: NN Serpentis Description: NN Serpentis is an eclipsing binary star system comprising of a red dwarf and a white dwarf about 1,702 light-years away in the constellation Serpens Caput. Two super-Jovian planets are found orbiting both stars in the system Proposed category: Exoplanets (Kepler Era, 2009 ~ 2017) Demo Object Name: NN Ser Author(s): fyr02 Release date: 2019-Jun-26 Link to download: NN Serpentis.zip Image:

[DaveBowman2001]

Title: MY Camelopardalis Description: MY Camelopardalis is a contact binary of two O-type giant stars in the open cluster Alicante 1, about 13,046 light-years away in the constellation Camelopardalis. Proposed category: Stars Demo Object Name: MY Cam Author(s): nussun Release date: 2020-Aug-6 Link to download: MY Camelopardalis.zip Image:

[DaveBowman2001]

Proposal to rename HD 189733 b (6DFB79CB-1B2B-56FA-9E30-7DCDAB4E241C) into simply HD 189733

[SpaceExplorer2008]

Title: GRAIL Description: The GRAIL was an lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft GRAIL-A (Ebb) and GRAIL-B (Flow) were launched on September 10, 2011 aboard a single launch vehicle: the most-powerful configuration of a Delta II, the 7920H-10. GRAIL-A separated from the rocket about nine minutes after launch, GRAIL-B followed about eight minutes later. They arrived at their orbits around the Moon 25 hours apart. The first probe entered orbit on December 31, 2011 and the second followed on January 1, 2012. The two spacecraft impacted the Lunar surface on December 17, 2012. Proposed Category: Spacecraft (2001 - 2020) Demo Object Name: N/A Author(s): toutatis Release date: 2021-07-19 Link to download: GRAIL.zip Image:

[DaveBowman2001]

Title: Fomalhaut Description: Fomalhaut is a triple star system consisting of an A-type and K-type main-sequence stars and a red dwarf about 25 light-years away in the constellation Pisces Austrinus. From 2008 to 2020, a planet was suspected to be forming in the protoplanetary disk surrounding the primary star of the system, until it was later determined it is just a dense cloud of debris within the disk

(NOTE: See the Hypothetical & Disproven category for this star system's now nonexistent planet, Dagon)

Proposed category: Stars Demo Object Name: Fomalhaut Author(s): Cham, Gurren Lagann Release date: 2017-Jul-27 Link to download: Fomalhaut.zip Image: Additional metadata: Hubble infrared image of Fomalhaut's debris disk that makes it look like the Eye of Sauron in "Lord of the Rings"

[DaveBowman2001]

Title: Fomalhaut (Disproven Planet) Description: This addon adds the former planet candidate called Dagon, which was previously the first exoplanet discovered through direct imaging until its existence was disproven in 2020 when the supposed planet was just a dense cloud of debris in the star's protoplanetary disk

(NOTE: See the Stars category for this star system's protoplanetary disk to be seen)

Proposed category: Hypothetical & Disproven Demo Object Name: Fomalhaut Author(s): Cham, Gurren Lagann Release date: 2017-Jul-27 Link to download: Fomalhaut (Disproven Planet).zip Image:

[SpaceExplorer2008]

Title: Vostok 1 Description: Vostok 1 was the first spaceflight of the Vostok programme and the first human orbital spaceflight in history. The Vostok 3KA space capsule was launched from Baikonur Cosmodrome on April 12, 1961, with soviet cosmonaut Yuri Gagarin aboard, making him the first human to reach orbital velocity around the Earth and to complete a full orbit around the Earth. This spaceflight lasted 1 hour and 48 minutes.

NOTE: The model is a little heavy and therefore may cause some minor crashes.

Proposed Category: Spacecraft Demo Object Name: Vostok 1 Author(s): ElChristou Release date: N/A Link to download: vostok.zip Image:

[levinli303]

just set up a new page, add-ons with most visits

https://celestia.mobi/resources/popular

[SpaceExplorer2008]

Title: Vanguard 1 Description: Vanguard 1 is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched (following Sputnik 1, Sputnik 2, and Explorer 1); it was launched March 17, 1958. Vanguard 1 was the first satellite to have solar electric power. Although communications with the satellite were lost in 1964, it remains the oldest human-made object still in orbit, together with the upper stage of its launch vehicle. Proposed Category: Spacecraft (1951 - 2000) Demo Object Name: Vanguard 1 Author(s): toutatis Release date: 2020-08-27 Link to download: Vanguard.zip Image: