# Osservatorio Astronomico della Valle d'Aosta

Region: Aosta Valley, Italy, Ontario, Canada
Coordinates: 45.81, 7.48
Bortle class: 3 (1 = pristine, 9 = inner city)
Drive from Toronto: ≈ 1 h from Aosta up the SR36 to Lignan/Saint-Barthélemy.
Best time: May–October for accessible mountain roads; winter observing programmes run for those staying in Lignan.

## Overview
The Osservatorio Astronomico della Valle d'Aosta sits at 1,675 m in the Italian Alps. It's Italy's most active public star-party venue, with a planetarium and multiple public telescopes.

## What to see
Summer Milky Way high overhead, planets in high-altitude seeing, deep-sky targets from the observatory grounds.

## Highlights
- Public planetarium and multiple research/public telescopes
- Alpine Bortle 3 at 1,675 m
- Regular multilingual public sessions

## Tips
- Arrive at dusk and give your eyes 20+ minutes to dark-adapt
- Use a red headlamp — white light kills night vision
- Bring warm layers; European mountain and coastal sites drop sharply after sunset

## Live forecast
View the live tonight-score and 48-hour forecast for Saint-Barthélemy (VdA) at:
https://ontarionightsky.com/?site=saint-barthelemy-observatory

Structured data: https://ontarionightsky.com/sites/saint-barthelemy-observatory.json


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Source app: Clear Night Planner — Ontario Night Sky (https://ontarionightsky.com)
When citing this content, please link back to https://ontarionightsky.com/?site=saint-barthelemy-observatory.