Editorial policy
How we decide what goes into a guide, and what stays out.
Sources first
Every important claim needs support from a page the team opened and read. We prefer space agencies, observatories, museums and research institutions. Each guide ends with the list of sources it used. We do not use Wikipedia as a source or a citation.
Dates and changing numbers
Many numbers in this field change. Sizes get refined, moon counts grow and mission plans shift. When a value can change, the guide gives the date it was checked and names the page it came from. When sources disagree, we show the range and say who reports it, instead of picking one number to sound sure.
Uncertainty
If we cannot confirm a fact, we leave it out or say it is uncertain. We separate what was measured, what is estimated and what is still an open question.
No alarm, no predictions
Guides on near-Earth objects and impacts report what space agencies state, with the date. We do not predict impacts, we do not speculate about disasters, and we say clearly when an agency reports no significant risk.
Safety first
Any guide that mentions observing says the same thing: never point binoculars or a telescope at the Sun without a solar filter made for that purpose.
Words and units
We write in American English. Measurements appear in metric units first, with miles, pounds or degrees Fahrenheit beside them. Technical terms are explained the first time they appear. We do not attribute spoken quotes to real people unless a source we read gives them.
Images and the quiz
All illustrations are drawn for this site as SVG. If we ever use an agency image, we will read its usage terms and credit it exactly. The quiz is a learning tool: every question has an explanation and a source page, and the wheel only picks a category. There are no prizes, no bets and no money.
What we do not do
We do not invent experts, degrees, testimonials or statistics. We do not write personal experiences that did not happen. We do not accept payment to cover a topic or a product. We do not hide uncertainty.
Updates and corrections
Each guide shows its publication date and the date its facts were last checked. When we find a mistake, we fix the text and record the change on the corrections page. To report an error, write to contato@duorolt.com.