Disclaimer

Plain words about what this site is and is not.

Educational information only. The Astronomer’s Atlas is a reference and learning resource. Nothing here is professional advice of any kind: not scientific consulting, not engineering guidance, not legal, financial, or medical advice.

Science moves; numbers carry uncertainty. Astronomical values are measurements with error bars, and they get revised. We label uncertain values, state ranges where experts disagree, and update pages as sources publish, but at any moment some figure on this site will already be out of date. Verify against primary sources before relying on any value.

Computed sky information is approximate. Tonight’s Sky and the calendar use simplified astronomical models and UTC dates; visibility depends on your location, horizon and weather. Never plan anything safety-critical around them. And never observe the Sun without certified filters.

Launch times shift. Every launch window shown is “no earlier than” and often moves by hours or days. Check the operator before driving anywhere.

External links. News items and source links lead to sites we do not control and whose content we are not responsible for.

AI-assisted content. Portions of this site are produced with AI assistance and clearly labeled where generated at runtime; figures are indicative and may be out of date, so always verify with primary sources.

Use of the site constitutes agreement with the Terms of Use; liability limitations appear there and in the footer of every page.