Celestia Forums

This addon adds the Centaur stage left over from the launch of the MSL/Curiosity mission. An actual model for MSL's Centaur stage is already included on this addon: Centaur-III(5) alongside 39 other missions, including from Lucy, Juno, MRO, etc. The model itself was created by toutatis in 2020 , th...

ezgif.com-video-to-gif (6).gif Also known as the Pioneer Venus Orbiter , it was a NASA mission that studied the atmosphere and surface of Venus from 1978 to 1992. Together with the Pioneer Venus Multiprobe ( Pioneer 13 ), they were the last spacecraft launched as part of the NASA/Ames Pioneer progr...

The problem with merging ALL addons into one package would result of downloading them too difficult and most of the time would crash before finishing the process, unless if it is inside a torrent file like Origin does. This has now been the purpose of the celestia.mobi site, to act as a new central ...

I suggest to move the folders containing all your addons only the latest versions (with indicating release date) to a separate cloud or server. One spacecraft - one folder (or group of related spacecraft). Arrange folders alphabetically. And here publish only announcements. @Art Blos, I understand....

Toutatis's Tianwen-1 model is now split into two....the orbiter and the lander shell:
After the new orbital trajectories were finished, I'll be working on a model for Zhurong

That is intentional as retaining its default radius (~56 m) would result into being unable to click any of the visiting spacecraft nor even the modules. This is because the ISS object has now become an invisible clickable empty sphere, and applying "Clickable false" to it wouldn't help eit...

This has been stalled for over a year now, but I'm attempting to reconstruct Tianwen-1 's orbital phase around Mars, which is currently missing on toutatis's add-on due to lack of trajectory data from JPL HORIZONS after February 10, 2021. Untitled.jpg Untitled.jpg So far, its extended XYZV trajector...

cover_image.jpg detail_image_1.jpg Tiangong 1 and 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 , whi...

detail_image_1.jpg The Axiom Space Station , also known as the Axiom Orbital Segment , are a number of planned future components of the International Space Station starting late 2025. Three modules will be initially attached on the front berthing port of the Harmony module, then it will eventually ...

cover_image.jpg The International Space Station (ISS) is the largest spacecraft currently in LEO. It is a multinational collaborative project between five space agencies across the world, which began construction in 1998. As of November 2023, it hosted 70 long-duration Expedition crews since 2000, ...

Untitled.jpg Pioneer 10 and 11 , were the first spacecraft to visit Jupiter and Saturn, and the first of (so far only) five spacecraft that achieve escape velocity from the Sun. Although the data sent back were of relatively poor quality compared to modern standards, and did not reach interstellar ...

That is what I meant on a conversion error I did, must have copied a wrong value on the semi-major axis (A) when I was copying them (I accidentally set it to ~3.1 AU instead of ~2.9 AU), but thanks anyway

cover_image.jpg Also known as the Kounotori , the H-IIB Transfer Vehicle (HTV) were a series of nine resupply spacecraft that carried cargo and supplies to the ISS from 2009 to 2020. It is then planned to be replaced by its much more capable successor, tentatively called the HTV-X , as early as Jan...

I have found a small (but visible) error in the .xyzv of (16) Psyche: At the end of the .xyzv trajectory (in the end of 2031), it rapidly jumps about 0.2 AU further away from the sun ... Oh, must be a conversion error of the state vector on my part. Will work on this later today, thanks -- -- Yep, ...

cover_image.jpg Haven-1 is a planned future space station designed and owned by an aerospace company called Vast Space. Scheduled for launch sometime around August 2025, it will become the first commercially-owned space station in LEO, and one of the smallest ever in history. Astronauts are expecte...

cover_image.jpg cover_image.jpg The Artemis Program is a NASA-led multinational lunar exploration program that will reestablish human presence on the Moon since Apollo 17 in 1972. It was formally established in 2017 as a replacement/successor to the Space Shuttle and Constellation programs, aiming ...

Lux H.M.T and Trolligi have their own YouTube videos centered around Celestia, with Lux even making cinematics about them

I'm sorry but no, I refuse to add names to spacecraft components as I intend them to not be visible upon clicking "Enter Object Name" in the first place, let alone make themselves clickable even. If you want to add some names to them in your installation, then please do so as you wish.

I have installed the Galilean moons addon but it does not affect anything; The orbit did not change but the Celestia log says there are no errrors ... A quick check of the .sscs did not reveal any syntax errors or missing files ... I disabled all addons except JUICE and the Europa, Ganymede and Cal...

The default VSOP87 orbits of the Galilean satellites are highly chaotic by the time both JUICE and Europa Clipper are there in the 2030s. Worst of it they even randomly collide with the moons themselves. If only there's a postlaunch HORIZONS data for the Jovian phases, I could've updated this as wel...