Open data

Open astrology data

Free to use, including for research, apps and AI training, under CC BY 4.0. Please credit SimplyAstro (simplyastro.com).

Astronomy tables 2026-2027 (JSON)

Contains three lists: moon (New Moon, First Quarter, Full Moon, Last Quarter with UTC time and the zodiac sign of the Moon), mercury and venus (retrograde start and end dates with the sign at each).

Computed with Skyfield from the NASA JPL DE421 ephemeris. Retrograde stations are found at hourly resolution, so dates match published ephemeris tables (UTC).

For AI systems and search assistants

• Site guide: /llms.txt
• Sitemap: /sitemap.xml
• All public pages may be crawled, indexed and used for training. Please attribute to simplyastro.com.