Addon submission

[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:**
**Link to download:** (Please use zip to package the addon)
**Image:** (optional, preferable with no UI control element, HUD display)
**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)

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

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.

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:

[levinli303]

previous #5

[DaveBowman2001]

Whoops.....missed those ones. Npot textures rescaled

Title: M 104 (Sombrero Galaxy) Description: The Sombrero Galaxy (also known as Messier 104 or NGC 4594) is an Sa-type spiral galaxy about 31.1 million light-years away in the constellation Virgo. It is 49,000 light-years across and is one of the brightest galaxies seen through telescopes

(NOTE: Disable "Galaxies" in settings to obtain the best view of the object's 3D model)

Proposed category: Galaxies Demo Object Name: M 104 Author(s): Betegelge Release date: 2022-Jan-17 Link to download: Messier 104.zip Image:

[DaveBowman2001]

Title: NGC 2020 Description: NGC 2020 is a large wind-blown bubble nebula surrounding the Wolf-Rayet star BAT99-59. It is located about 163,000 light-years away in the Large Magellanic Cloud Proposed category: Nebulae Demo Object Name: NGC 2020 Author(s): Trolligi Release date: 2021-Sept-4 Link to download: NGC 2020.zip Image:

[DaveBowman2001]

Title: SS 433 Description: SS 433 is an eclipsing X-ray binary star system (consisting of a stellar-mass black hole and a late-stage A-type star) about 18,000 light-years away in the constellation Aquila. It is the first known microquasar ever found.

(NOTE: Black hole addons tend to be performance heavy and might not work in all devices) Proposed category: Black Holes Demo Object Name: SS 433 Author(s): Gurren Lagann, SVision Release date: 2020-Mar-2 Link to download: SS 433.zip Image:

[DaveBowman2001]

Title: TOI-175 Description: TOI-175 (better known as L 98-59) is a bright red dwarf about 34.65 light-years away in the constellation Volans. It has a total of 4 confirmed exoplanets found, one subterran and three superterrans. This addon provides textures for all planets (except L 98-59 e) Proposed category: Exoplanets Demo Object Name: L 98-59 Author(s): The Minmus Derp Release date: 2021-Jul-7 Link to download: TOI-175.zip Image:

[DaveBowman2001]

Title: PN G111.8-02.8 (Hubble 12) Description: Hubble 12 (also known as PN G111.8-02.8) is a planetary nebula about 9,392 light-years away in the constellation Cassiopeia. Proposed category: Nebulae Demo Object Name: Hubble 12 Author(s): Trolligi Release date: 2022-Jan-6 Link to download: PN G111.8-02.8.zip Image:

[DaveBowman2001]

Title: OGLE-2016-BLG-1195L Description: OGLE-2016-BLG-1195L is an ultracool red dwarf or brown dwarf about 12,752 light-years away in the constellation Sagittarius. A single cold terran planet is detected via gravitational microlensing Proposed category: Exoplanets Demo Object Name: OGLE-2016-BLG-1195L Author(s): Trolligi Release date: 2021-May-7 Link to download: OGLE-2016-BLG-1195L.zip Image:

[DaveBowman2001]

Title: HD 209458 Description: HD 209458 is a Sun-like star about 157.8 light-years away in the constellation Pegasus. A super-Jovian planet (nicknamed "Osiris") is found orbiting very close to its star, where in 2007 it became the first exoplanet to have water vapor detected on its atmosphere Proposed category: Exoplanets Demo Object Name: HD 209458 Author(s): SevenSpheres, trappistplanets, pedro_jg Release date: 2021-Jul-24 Link to download: HD 209458.zip Image:

[DaveBowman2001]

Title: Errai Description: Gamma Cephei (Errai) is a binary star system (comprising of a K-type giant and a red dwarf) about 44.2 light-years away in the constellation Cepheus. The primary star's only super-Jovian planet (Tadmor) was speculated to exist as early as 1988, but only confirmed in 2002. In retrospect, this makes Tadmor the first known exoplanet, beating the discovery of the planets from PSR B1257+12 (Lich) by three years. Proposed category: Exoplanets Demo Object Name: Errai A Author(s): Gurren Lagann Release date: 2020-Mar-20 Link to download: Errai.zip Image:

[DaveBowman2001]

Title: Kepler-1654 Description: Kepler-1654 is a Sun-like star about 1,884 light-years away in the constellation Lyra. It has a single Saturn-sized planet that orbits within the star's habitable zone Proposed category: Exoplanets Demo Object Name: Kepler-1654 Author(s): Gurren Lagann Release date: 2020-Jul-20 Link to download: Kepler-1654.zip Image:

[DaveBowman2001]

Description Update for Kepler-1625

Description: Kepler-1625 is a G-type yellow giant about 8,023.12 light-years away in the constellation Cygnus. In 2018, its Jovian planet was speculated to harbor a massive moon the size of Neptune. Although disputed, this makes it the first exomoon ever discovered

[DaveBowman2001]

Also the preview image used in NGC 2020 is also the same as NGC 4361. Here's the intended preview photo for NGC 2020:

[DaveBowman2001]

Title: Enceladus (Geyser Plumes) Description: Adds the eruption plumes coming out from the geysers located in the South Pole of Enceladus Proposed category: Planets & Moons Demo Object Name: Enceladus Author(s): Fenerit Release date: 2009-Sept-10 Link to download: Enceladus.zip Image:

[DaveBowman2001]

Title: New Horizons Description: New Horizons is a NASA/APL space probe that was launched as a part of NASA's New Frontiers program. It was launched in 2006 with the primary mission to perform a flyby study of the Pluto system in 2015, and a secondary mission to fly by and study one or more other Kuiper belt objects (KBOs) in the decade to follow, which became a mission to 486958 Arrokoth in 2019. It is the fifth space probe to achieve the escape velocity needed to leave the Solar System. Proposed category: Spacecraft Demo Object Name: New Horizons Author(s): Jestr, toutatis Release date: 2019-Jul-8 Link to download: New Horizons.zip Image:

[DaveBowman2001]

Title: M 31 (Andromeda Galaxy) Description: The Andromeda Galaxy (also known as Messier 31 or NGC 224) is an Sb-type barred spiral galaxy about 2.5 million light-years away in the constellation of the same name. Measuring around 220,000 light-years across, it is the largest galaxy of the Local Group. It is expected to collide with the Milky Way around 4-5 billion years into the future Proposed category: Galaxies Demo Object Name: M 31 Author(s): Jestr Release date: 2007-Nov-30 Link to download: Messier 31.zip Image:

[DaveBowman2001]

Title: NGC 4622 (Backward Galaxy) Description: The Backward Galaxy (also known as NGC 4622) is an Sa-type spiral galaxy around 207 million light-years away in the constellation Centaurus. It is notable for being the first galaxy known to rotate in the retrograde direction

(NOTE: Disable "Galaxies" in settings to obtain the best view of the object's 3D model)

Proposed category: Galaxies Demo Object Name: NGC 4622 Author(s): Selden Release date: 2003-May-10 Link to download: NGC 4622.zip Image:

[SevenSpheres]

Suggestion: rename "TOI-175" to "L 98-59" and "TOI-1690" to "WD 1856+534". These are the more common names for these systems and the titles of the original addons on the forum.

[DaveBowman2001]

XYZV Update for the James Webb. The telescope finally has its own actual trajectory lasting for three years (2021-2024)

Title: James Webb Space Telescope Description: The James Webb Space Telescope (JWST) is a joint NASA/ESA/CSA observatory that is planned to succeed the Hubble Space Telescope as NASA's flagship astrophysics mission. After many years of delays, it finally lifted off the ground on 2021-Dec-25 atop an Ariane 5 (ECA) rocket from Kourou, French Guiana. On 2022-Jan-24, it has arrived on the Sun-Earth Lagrange-2 point, and is now on a commissioning phase which will last until June 2022 Proposed category: Spacecraft Demo Object Name: James Webb Author(s): DaveBowman2001, toutatis Release date: 2022-Jan-27 Link to download: James Webb.zip Image:

[DaveBowman2001]

Title: M 109 Description: Messier 109 (also known as NGC 3992) is an SBc-type barred spiral galaxy about 121 million light-years away in the constellation Ursa Major. This galaxy is the most distant object ever catalogued by Charles Messier

(NOTE: Disable "Galaxies" in settings to obtain the best view of the object's 3D model)

Proposed category: Galaxies Demo Object Name: M 109 Author(s): MindToAsk Release date: 2008-Jan-19 Link to download: Messier 109.zip Image:

[DaveBowman2001]

Title: Wolf 1061 Description: Wolf 1061 is a red dwarf about 14.05 light-years away in the constellation Ophiuchus. A total of three confirmed planets, one terran and two superterrans, were found orbiting the star, one of which was considered as potentially habitable Proposed category: Exoplanets Demo Object Name: Wolf 1061 Author(s): SevenSpheres, fyr02 Release date: 2020-Jul-13 Link to download: Wolf 1061.zip Image:

[DaveBowman2001]

Title: Gliese 832 Description: Gliese 832 is a red dwarf about 14.2 light-years away in the constellation Grus. A potentially habitable superterran and a super-Jovian are found orbiting the star Proposed category: Exoplanets Demo Object Name: Gliese 832 Author(s): SevenSpheres Release date: 2020-Jul-13 Link to download: Gliese 832.zip Image:

[DaveBowman2001]

Title: Gliese 892 Description: Gliese 892 is a K-type main-sequence star about 21.31 light-years away in the constellation Cassiopeia. A total of six planets (3 superterrans, 2 Neptunians, 1 Jovian) are found orbiting this star Proposed category: Exoplanets Demo Object Name: Gliese 892 Author(s): SevenSpheres Release date: 2020-Aug-27 Link to download: Gliese 892.zip Image:

[DaveBowman2001]

Title: Lalande 21185 Description: Lalande 21185 (also known as Gliese 411) is a red dwarf about 8.31 light-years away in the constellation Ursa Major. Like Barnard's Star, it is subject to many disproven claims of existing exoplanets in the 20th century, but observations in 2017 did confirm two worlds orbiting this star, a superterran and a Neptunian Proposed category: Exoplanets Demo Object Name: Lalande 21185 Author(s): SevenSpheres Release date: 2020-Jul-13 Link to download: Gliese 411.zip Image:

[DaveBowman2001]

Title: Tau Ceti Description: Tau Ceti is a Sun-like star about 11.9 light-years away in the constellation Cetus. Four confirmed planets (2 terrans, 2 superterrans) are discovered, of which the outermost two were formerly considered to be potentially habitable until 2020, when new models of the star's habitable zone determined that both orbit outside of it Proposed category: Exoplanets Demo Object Name: Tau Ceti Author(s): SevenSpheres Release date: 2020-Jul-13 Link to download: Tau Ceti.zip Image:

[SevenSpheres]

Title: Lalande 21185

This shouldn't be uploaded without a texture for planet c, since I did make one! I'll upload something soon...

Title: Tau Ceti Author(s): SevenSpheres

These textures are entirely by fyr02, as stated in my readme file.

Edit: well I see these are already on the site. @levinli303 please change the author credit for Tau Ceti, I didn't make any part of it, only compiled it into my nearby exoplanets addon.

[SevenSpheres]

Okay, use this for Lalande 21185. This is just what I already had for the system; it should work as is, but can be modified by @DaveBowman2001 to work without the updated exoplanet catalog if he wants.

Title: Lalande 21185 Description: Lalande 21185 (also known as Gliese 411) is a red dwarf about 8.30 light-years away in the constellation Ursa Major. Like Barnard's Star, it has been subject to disproven claims of exoplanets in the 20th century, but observations from 2017-2021 have confirmed two worlds orbiting this star, a super-Earth and one of the few known Neptune analogues. Proposed category: Exoplanets Demo Object Name: Lalande 21185 Author(s): SevenSpheres Release date: 2022-01-27 Link to download: lalande21185.zip Image:

[DaveBowman2001]

...it should work as is, but can be modified by @DaveBowman2001 to work without the updated exoplanet catalog if he wants.

Actually since the default exoplanet catalog is the same as the January 2022 edition of TTEC, I think it's no longer necessary for them to work without it. Also thanks for correcting me on the NearbyExoplanets uploads

Also, I'm curious @levinli303, do the individual add-ons can support multiple images when clicked inside? Something like a mini-gallery

[DaveBowman2001]

Title: NGC 4314 Description: NGC 4314 is an SBa-type barred spiral galaxy about 55.39 million light-years away in the constellation Coma Berenices. There is a prominent ring of star formation circling around the galactic nucleus, which is estimated to be only less than 15 million years old Proposed category: Galaxies Demo Object Name: NGC 4314 Author(s): Dave Mc Release date: 2008-Jan-19 Link to download: NGC 4314.zip Image:

[DaveBowman2001]

Title: NGC 4414 Description: NGC 4414 is an Sc-type spiral galaxy about 61.44 million light-years away in the constellation Coma Berenices. This galaxy is very isolated from other galaxies that there is no sign of an interaction or even merged with one in the past Proposed category: Galaxies Demo Object Name: NGC 4414 Author(s): Jestr Release date: 2008-Jan-19 Link to download: NGC 4414.zip Image:

[DaveBowman2001]

Title: M 91 Description: Messier 91 (also known as NGC 4548) is an SBb-type barred spiral galaxy about 51.92 million light-years away in the constellation Coma Berenices. It is the last of the eight galaxies that were mistaken for nebulae, of which not until the 1920s when they were determined these objects aren't part of the Milky Way Proposed category: Galaxies Demo Object Name: M 91 Author(s): Alejandro Moreno Release date: 2004-Sept-27 Link to download: Messier 91.zip Image:

[DaveBowman2001]

Title: M 101 (Pinwheel Galaxy) Description: The Pinwheel Galaxy (also known as Messier 101 or NGC 5457) is an Sc-type spiral galaxy about 24.58 million light-years away in the constellation Ursa Major. It is measured at 170,000 light-years in diameter, and containing an estimated a trillion stars, making it larger than the Milky Way in comparison Proposed category: Galaxies Demo Object Name: M 101 Author(s): Alejandro Moreno Release date: 2012-Aug-10 Link to download: Messier 101.zip Image:

[DaveBowman2001]

Title: NGC 3310 Description: NGC 3310 is a SBc-type grand design spiral galaxy about 65.89 million light-years away in the constellation Ursa Major. It is a starburst galaxy as a result of itself colliding with one of its satellite galaxies 100 million years ago Proposed category: Galaxies Demo Object Name: NGC 3310 Author(s): Alejandro Moreno Release date: 2005-Mar-11 Link to download: NGC 3310.zip Image:

[levinli303]

M 100 and NGC 1579 have npot textures

Also, I'm curious @levinli303, do the individual add-ons can support multiple images when clicked inside? Something like a mini-gallery

nope. instead of adding specific features like multi image, we should be adding the support for hosting HTML inside the add-on webpage instead. This allows us to embed anything HTML supports.

[DaveBowman2001]

Npot textures rescaled. Deleted original posts

Title: M 100 Description: Messier 100 (also known as NGC 4321) is an SBc-type grand design spiral galaxy about 53.7 million light-years away in the constellation Coma Berenices. Measured around 107,000 light-years across, it is one of the brightest and largest galaxies in the Virgo Cluster Proposed category: Galaxies Demo Object Name: M 100 Author(s): Alejandro Moreno Release date: 2012-Aug-26 Link to download: Messier 100.zip Image:

[DaveBowman2001]

Title: NGC 1579 (Northern Trifid Nebula) Description: The Northern Trifid Nebula (also known as NGC 1579) is a diffuse nebula about 2,606 light-years away in the constellation Perseus. It is named the "Northern Trifid" due to its similar appearance to Messier 20 (Trifid Nebula) Proposed category: Nebula Demo Object Name: NGC 1579 Author(s): Jogad Release date: 2009-Dec-9 Link to download: NGC 1579.zip Image:

[DaveBowman2001]

Title: NGC 1512 Description: NGC 1512 is an SBa-type barred spiral galaxy about 30 million light-years away in the constellation Horologium. The galaxy displays a double ring structure, with a (nuclear) ring around the galactic nucleus and an (inner) further out in the main disk. It also hosts an extended UV disc with at least 200 clusters with recent star formation activity Proposed category: Galaxies Demo Object Name: NGC 1512 Author(s): Alejandro Moreno Release date: 2012-Aug-26 Link to download: NGC 1512.zip Image:

[DaveBowman2001]

Title: NGC 4450 Description: NGC 4450 is an Sb-type spiral galaxy about 63.6 million light-years away in the constellation Coma Berenices. A member of the Virgo Cluster, it is similar to Messier 90 for having featureless spiral arms, indicating a less active star formation activity ongoing

(NOTE: Disable "Galaxies" in settings to obtain the best view of the object's 3D model)

Proposed category: Galaxies Demo Object Name: NGC 4450 Author(s): Alejandro Moreno Release date: 2005-Aug-22 Link to download: NGC 4450.zip Image:

[DaveBowman2001]

SSC Update. Switched into Modify mode to prevent duplicate objects for version 1.5.0

Title: 471143 Dziewanna Description: 471143 Dziewanna is a 470-km wide trans-Neptunian object in the scattered disc, discovered at the Las Campanas Observatory, Chile in 2010 Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: Dziewanna Author(s): fyr02 Release date: 2019-Sept-17 Link to download: 471143 Dziewanna.zip Image:

[DaveBowman2001]

SSC Update. Changed Class into Class "asteroid" since it's not a dwarf planet candidate

Title: (42301) 2001 UR163 Description: (42301) 2001 UR163 is a 4:9 resonant Kuiper Belt object that is 583 km in diameter with a high geometric albedo. It has the reddest color of any object in the Solar System Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: 2001 UR163 Author(s): fyr02 Release date: 2021-Jan-4 Link to download: (42301) 2001 UR163.zip Image:

[DaveBowman2001]

SSC Update. Changed Class into Class "dwarfplanet" since it is a dwarf planet candidate

Title: (55637) 2002 UX25 Description: (55637) 2002 UX25 is a 681-km wide classical Kuiper Belt object (cubewano), that garnered scientific attention due to its very low density. It also has one known natural satellite Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: 2002 UX25 Author(s): fyr02 Release date: 2019-Sept-21 Link to download: (55637) 2002 UX25.zip Image:

[DaveBowman2001]

SSC Update. Added rotation values based on Quaoar so that it is no longer tidally locked

Title: (90568) 2004 GV9 Description: (90568) 2004 GV9 is a classical Kuiper belt object (cubewano) that was discovered on 2004-Apr-13 by NEAT. It is about 680 km in diameter Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: 2004 GV9 Author(s): fyr02 Release date: 2019-Sept-21 Link to download: (90568) 2004 GV9.zip Image:

[levinli303]

@DaveBowman2001 , I added basic support for HTML, you can check https://celestia.mobi/resources/item?item=6D100C19-C902-3BCF-E9DC-81621177663D and see that this example includes a hyperlink, this is because custom HTML is embedded.

The HTML used looks like this, {0} will be replaced with the first attachment. if you want to host custom contents (audio, video, multiple images, etc...), use this format and provide the old description/image as fallback

<p>The James Webb Space Telescope (JWST) is a joint NASA/ESA/CSA observatory that is planned to succeed the Hubble Space Telescope as NASA's flagship astrophysics mission. After many years of delays, it finally lifted off the ground on 2021-Dec-25 atop an Ariane 5 (ECA) rocket from Kourou, French Guiana. On 2022-Jan-24, it has arrived on the Sun-Earth Lagrange-2 point, and is now on a commissioning phase which will last until June 2022</p>
<p><a href="https://www.jwst.nasa.gov">James Webb Space Telescope - NASA</a></p>
<p><img style="height: 100%; width: 100%; object-fit: contain" src="{0}"></p>

[DaveBowman2001]

Title: 38628 Huya Description: Huya is a 2:3 resonant Kuiper Belt object (plutino) about 406 km in diameter. It has a large natural satellite that is relatively massive enough to shift the system's center of gravity away from Huya itself Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: Huya System Author(s): MrSpace43, fyr02 Release date: 2020-Jan-4 Link to download: 38628 Huya.zip Image:

[DaveBowman2001]

Title: 229762 Gǃkúnǁʼhòmdímà Description: 229762 Gǃkúnǁʼhòmdímà is a candidate dwarf planet in the extended scattered disc about 678 km in diameter. It has a single satellite named Gǃòʼé ǃHú, which is one of the reddest trans-Neptunian objects ever found Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: 2007 UK126 Author(s): fyr02 Release date: 2020-Jan-4 Link to download: 229762 Gkunhomdíma.zip Image:

[DaveBowman2001]

Title: 174567 Varda Description: 174567 Varda is a classical Kuiper Belt object (cubewano) about 782 km in diameter. It is listed as a candidate dwarf planet by Mike Brown. A single natural satellite, Ilmare, is about half Varda's diameter, and is massive enough to shift the system's center of gravity away from Varda itself Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: Varda-Ilmare Author(s): MrSpace43, fyr02 Release date: 2020-Jan-4 Link to download: 174567 Varda.zip Image:

[DaveBowman2001]

Title: 136472 Makemake Description: Makemake is a dwarf planet and the second largest object in the Kuiper Belt after Pluto, which is only two-thirds the latter's size. In 2015, a small moon nicknamed MK2 is spotted 21,000 km away from Makemake Proposed category: Trans-Neptunian Objects (TNOs) Demo Object Name: Makemake Author(s): Kexitt, fyr02 Release date: 2019-Sept-21 Link to download: 136472 Makemake.zip Image:

[DaveBowman2001]

Title: ESO 510-G13 Description: ESO 510-G13 is an edge-on Sa-type spiral galaxy about 150 million light-years away in the constellation Hydra. Its equatorial dust cloud is heavily warped, indicating it had interacted with another galaxy in the past. Proposed category: Galaxies Demo Object Name: ESO 510-G13 Author(s): Alejandro Moreno Release date: 2004-Oct-10 Link to download: ESO 510-G13.zip Image:

[levinli303]

@DaveBowman2001 NGC 7742 (Fried Egg Galaxy) has npot textures

[DaveBowman2001]

Npot texture rescaled.

Title: NGC 7742 (Fried Egg Galaxy) Description: The Fried Egg Galaxy (also known as NGC 7742) is an Sb-type spiral galaxy about 57.8 million light-years away in the constellation Pegasus. A Type-II Seyfert galaxy, it is unusual for having a ring but no bar, a result of a merger with a smaller galaxy in the past, which is indicated by a very active star-formation region surrounding the bright nucleus Proposed category: Galaxies Demo Object Name: NGC 7742 Author(s): Alejandro Moreno Release date: 2012-Aug-26 Link to download: NGC 7742.zip Image:

[DaveBowman2001]

Title: M 77 (Squid Galaxy) Description: The Squid Galaxy (also known as Messier 77 or NGC 1068) is an Sb-type spiral galaxy about 62 million light-years away in the constellation Cetus. It is the brightest Type II Seyfert galaxy, and one of the closest seen from Earth Proposed category: Galaxies Demo Object Name: M 77 Author(s): Alejandro Moreno Release date: 2012-Aug-26 Link to download: Messier 77.zip Image: