Compute distances, lookback times, ages, and observational quantities for any redshift. Supports curvature, dark energy w, batch processing, reverse lookups, and live visualisations.
Launch ToolInteractive Davis & Lineweaver (2004) spacetime diagram: past and future light cones, particle and event horizons, the Hubble sphere, and galaxy worldlines for any wCDM cosmology.
Launch ToolA highly customizable QR Code generator. Change colors, margins, error correction, and embed your own logos—all in your browser.
Launch ToolEstimate black hole retention fractions in star clusters using Hobbs et al. (2005) scaling. Visualize natal kick distributions.
Launch ToolClient-Side Image Steganography. Hide text, files, or images securely inside other images directly in your browser.
Launch Tool