Verifying a Death Sky in Stellarium, Step by Step
You do not need to take our word for it: any death sky can be checked in Stellarium in a few minutes — set the time, the place, the coordinates and the rule, and the result speaks for itself.
Set Stellarium to the recorded date, time and coordinates; turn on the equatorial grid; read the zenith (straight up); find the flagged star by its catalog ID and measure its angular distance from the zenith. Four steps, and the result is either confirmed or refuted.
What you need: free software and a record
Stellarium is free, open-source planetarium software, available as a desktop app and on the web. Pair it with one record: date, time (mind the time zone), the place’s coordinates, and the catalog ID of the flagged star. All of these appear on our case pages and certificates.
Step one: set time and place
Open the date-and-time dialog, enter the recorded moment, and set the time zone to the one in use at that place at that time; then set the location by coordinates. These two inputs orient the whole dome — they deserve the most care, and they are where mistakes most often hide.
Step two: read the zenith — step three: find the star
Press Z to look straight up, enable the equatorial grid, and read the right ascension and declination of that point; compare them with the numbers on the record. Then search the catalog ID, and the software will point straight at the star. Look at where it sits relative to the zenith — it should be the closest star in that neighborhood.
What if it does not match
Check the three usual suspects first: a wrong time zone (especially daylight saving or historical zones), coordinates entered with the wrong sign, or an “exact” time that is actually approximate. If none of those explain it, the difference deserves attention — send us a screenshot and we will check it; if we got it wrong, we correct it and say so. A system that can be refuted is a system that can be trusted.
FAQ
Is the web version of Stellarium enough?
Yes for the core steps: setting time, location and the equatorial grid. The desktop version handles historical time zones and fainter stars more completely for stricter checks.
Why is the nearest star I get slightly different?
Usually the catalog depth or filter rule differs: we restrict candidates to stars brighter than a given magnitude and above the horizon, while different apps show different catalog depths by default. The gap is normally tiny — the method matters more than one star.
用 Stellarium 亲自核对一片离世的星空
不需要相信我们:任何一片离世的星空,都可以用免费的 Stellarium 在几分钟内核对一遍——把时间、地点、坐标与规则逐一放进去,结果会自己说话。
步骤:在 Stellarium 里把日期、时刻与地点设为记录中的值与坐标,打开赤道坐标网格,读出天顶(正上方)的赤经赤纬;再按星表编号找到被标注的那颗星,核对它与天顶的角距是否为最近。四步之内,结果可验证、可反驳。
准备:免费软件与一条记录
Stellarium 是免费开源的星空软件,桌面版和网页版都能用。搭配一条记录即可开工:日期、时刻(注意时区)、地点的经纬度,以及被标注的星表编号。这些信息在我们的案例页与证书上都能找到。
第一步:把时间与地点设对
在软件中进入日期时间设置,填入记录中的时刻并把时区调为当时当地所用的时区;在地点设置中输入经纬度。这两个输入决定了天穹的朝向——它们是整次核对里最需要小心的地方,也是最容易出错的地方。
第二步:读出天顶,第三步:找到那颗星
按 Z 键看向天顶(正上方),打开赤道坐标网格,读出该点的赤经与赤纬,与记录页上的数值比对。然后用搜索功能输入星表编号,软件会直接指向那颗星;观察它与天顶的相对位置——它应当是那一带角距最小的星。
对不上怎么办
先查最常见的三处差异:时区填错(尤其是夏令时或历史时区)、坐标方向填反、或记录里的"时刻"本身是近似值。若这些都不是,差异就值得深究——把截图发给我们,我们核对;如果确实算错,我们更正并写明更正。一个能被反驳的系统,才是一个可以被信任的系统。
FAQ
网页版 Stellarium 够用吗?
够用:设定时间、地点与坐标网格这几项核心功能都在。桌面版在历史时区与星空深度上更完整,适合更严格的核对。
为什么我算出的最近星和页面差一点?
常见原因是星表范围与筛选规则不同:我们会限定亮于某个星等且高于地平线的星,不同软件默认显示的星表深度不一样。差额通常很小,核对方法本身比单颗星更重要。