---
title: "Tonight's Sky"
url: 'https://casazza.net/Home/software/tonights-sky'
markdown: 'https://casazza.net/Home/software/tonights-sky.md'
date: '2026-10-27'
description: 'Tonight’s Sky Planning an effective observing session requires knowing precisely what objects are observable above your local horizon at any given hour of the night. Tonight’s Sky is a custom web application built to calculate solar system ephemerides and deep-sky visual observability thresholds in…'
---

# Tonight’s Sky

Planning an effective observing session requires knowing precisely what objects are observable above your local horizon at any given hour of the night. Tonight’s Sky is a custom web application built to calculate solar system ephemerides and deep-sky visual observability thresholds in real time. Rather than digging through generic planetarium software or static paper tables, this tool quickly models astronomical twilight, moon phases, planetary positions, and optimal transit times tailored to your observing site.

Designed with the practical observer in mind, it helps you sequence your target list from dusk till dawn, ensuring you make the absolute most of every dark-sky hour without wasting time on objects obstructed by terrain or twilight glare.

 [Launch Tonight’s Sky](https://tonightssky.com)

---

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