Nights on Earth lists astronomical events including meteor showers and planetary conjunctions.
Free
24 alternativesSiril
Siril processes astronomical images and provides information about available software versions.
About Siril
Siril is an installable application for pre-processing and processing astronomical images. It is designed for noise reduction and improving the signal-to-noise ratio of an image from multiple captures. Downloads are listed for Linux, Windows and macOS, including Intel and Apple Silicon Mac builds. Version 1.4.4 was released on June 17, 2026.
Pricing is not clearly stated.
Key features
- Calibration using bias, dark and flat master files
- Automatic or manual alignment
- Stacking registered images with outlier rejection
- Colour calibration, deconvolution and histogram stretching
- Star brightness variation analysis and astrometry information for objects in an image
- Automatic processing with dedicated scripts or manual step-by-step control
- Native processing of SER videos for deep-sky lucky imaging
- Alignment can target all stars, one star or the nebulae body
Best for: People working with astronomical images who need calibration, stacking, enhancement and analysis tools.
Watch out for
- The current 1.4.4 release page notes known issues and links to the bug tracker.
- MINGW64 Windows 64-bit and portable builds are marked deprecated.
Siril at a glance
- Website
- siril.org
- Category
- Education & Learning › Space & Astronomy
- Type
- App
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, macOS, Windows
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Siril alternatives
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