The high, dry, cloud-free desert around San Pedro de Atacama is one of the best places on Earth to look at the stars, and the night sky is a main reason many travellers come. At an altitude of more than 2,400 m, with very little cloud, humidity or light pollution, the Milky Way appears as a bright, textured band from horizon to horizon, and planets, star clusters and nebulae can be seen with the naked eye or through a telescope. Many professional observatories are located in this region, including the international ALMA array, and amateur astronomers and guides in the village have built a thriving industry around sharing the sky with visitors. A typical astronomy tour starts after dark with a short drive out of the village to a site away from the lights. A guide explains the constellations of the southern hemisphere, including the Southern Cross and the Magellanic Clouds, using a laser pointer, and then sets up several telescopes for views of the Moon, planets such as Jupiter and Saturn when they are in the sky, double stars, and bright clusters and nebulae. Many operators offer photographs of you under the stars, and some include hot drinks, snacks or a glass of wine, which are welcome in the cold. It is a humbling, memorable evening.
How it works
Tours run on most nights and last about two to three hours, with pickup from your hotel. Sessions are often organised in small groups, and some operators have their own sites, domes and equipment. Moon phase matters: a full Moon washes out faint objects, though the Moon itself is a spectacular telescope target, and the darkest skies come around the new Moon. Cloud is rare but can occur, particularly in the summer months of the altiplanic winter, so ask about the operator's policy if the sky is not suitable.
What to expect
The desert is cold at night all year round, so bring a warm jacket, hat, gloves and thick socks. Telescopes need time to settle, and your eyes need about twenty minutes to adapt to the dark, so avoid looking at phone screens and use a red light if you need one. Guides usually tell you a mix of science and local stories, including how Andean cultures read the dark patches of the Milky Way as animal shapes. Photography is possible but requires a tripod, so many operators offer photographs or advice instead.
Making the most of it
Look up the Moon phase before choosing your night, and avoid the days around the full Moon if the sky is your priority. Schedule stargazing on a day with a relaxed morning, since it can finish late. Options range from large-group tours with several telescopes to small-group or semi-private sessions and astrophotography experiences.
If you have a particular interest, such as deep-sky objects or photography, ask the operator in advance. The Atacama is also home to public visitor programmes at some observatories, which are worth checking if you want to go further.
What to expect
The experience
A guided evening session in the dark desert with a sky tour and views through telescopes.
Best time
After dark, ideally around the new Moon for the darkest sky.
How long
Two to three hours with pickup from your hotel.
Tips
Dress very warmly, avoid white light, check the Moon phase and book a small-group session if you can.
Quick picks
- Best for
- Anyone who wants to see the Milky Way and planets in unusually clear skies.
- Families
- Older children are often fascinated, though the late hours and cold can be tough for younger ones.
- Couples
- A starry sky and a warm drink make a memorable romantic evening.
- Pair with
- Pair it with a sunset outing earlier the same day.
- Time needed
- Allow an evening.
Good questions
Why is San Pedro de Atacama good for stargazing?+
High altitude, very dry air, little cloud and low light pollution give some of the clearest night skies in the world.
When is the best time?+
The darkest skies come around the new Moon. A full Moon brightens the sky and hides faint objects.
Is it cold?+
Yes, desert nights are cold all year. Bring a warm jacket, hat, gloves and thick socks.
Can I take photos?+
Many operators take photos of you with the stars. Taking your own night-sky photos requires a tripod and manual settings.
What if it is cloudy?+
Clouds are rare but can occur. Ask the operator about their policy on rescheduling or refunds.