What is the source of the data?
Our database of launches keeps thousands and thousands of pieces of data that we diligently organize to present it on the website in a coherent and meaningful way. We collect the data from various sources: Wikipedia, official websites of launch service providers, Twitter, news articles.
New data arrives all the time - in fact, a few times a day - either with the help of automatic machinery we've built, or entered manually.
Is the data complete?
We strive to build a complete catalog of all rocket launches ever happened and all launches that are known to be planned. That said, we prioritize information relevant to the current launches and, more broadly, to the space industry's ongoing development.
There are a few areas where we know our catalog is currently lacking information.
For example, the test "hops" of Starship prototypes or test flights of the Blue Origin's New Shepard rocket. Those are all essential for the development of the space industry, and we will definitely add them to our database. There have been many more suborbital flights of other rockets, and we are aiming to add the most notable ones eventually.
Lists of astronauts and cosmonauts
We already have data for many crewed flights (including Vostok, Soyuz, and Mercury-Redstone), and we are planning to add all the remaining data (for example, crew info of all the Space Shuttle missions).
Mission details for some flights
There have been less than 7000 rocket flights over the last 60+ years. One might say that it's a rather small number for such a long period and thus every rocket launch counts and there are no insignificant ones. We agree. And yet, we have to admit that, to some extent, rocket launches have become a routine (in a good way!). For some of them, there is really not much to say, so listing the payloads and technical info might be just enough. As a result, we aim to add details for the most significant events first, but will eventually cover all of them, including those that we (subjectively) find less interesting.
Can I rely on the data?
Yes and no.
We strive to be diligent in collecting and organizing data, and we expect it to be correct to a large extent. Yet, we can't give you a guarantee that the data is 100% accurate. Data sources are not always free from mistakes and typos, and it may take some time for us to notice a problem and correct it. Then, there is also some time lag between actual events and their reporting on our site.
If you depend on the correctness of the data financially or in any other significant way, we urge you to be mindful and do your own diligent research. Compare data from a few independent sources before taking any action or making a serious decision.