Astrophotography Blog: Crux

Showing posts with label Crux. Show all posts

Tuesday, September 17, 2019

Bolivia Astrophotography - Salar de Uyuni at Night

These photographs capture an unforgettable night under the stars at the Salar de Uyuni in Bolivia — a place that feels almost unreal after dark. Shot during a guided Uyuni stargazing tour, the images reveal the brilliance of the southern hemisphere night sky above the world’s largest salt flat.

At an elevation of approximately 3,650 meters (12,000 feet), Salar de Uyuni offers exceptionally transparent air, minimal light pollution, and dramatic atmospheric effects. The night skies above Salar de Uyuni approach Bortle Class 1 on the dark-sky scale. Such skies allow the Milky Way to appear extremely bright and structured, with visible airglow and exceptional contrast even at low elevations above the horizon. The result is a sky filled with intense star fields, vivid red and green airglow, and prominent southern constellations such as Crux (the Southern Cross).

The vast salt surface creates a unique foreground for astrophotography. Distinct hexagonal salt patterns, formed by crystallization as water evaporates, are visible even at night and provide scale and texture beneath the Milky Way.

Camera & Settings:
Canon EOS 60Da
Canon EF 16–35mm f/2.8L
30 seconds · f/2.8 · ISO 6400
Panoramic night-sky composition

Milky Way rising diagonally above the salt horizon at Salar de Uyuni, Bolivia, under southern hemisphere night sky

Bolivia Astrophotography - Salar de Uyuni at Night

In this first image, the Milky Way rises diagonally from the salt horizon on the left toward the upper right of the frame. The Galactic Center is clearly visible, glowing intensely against the high-altitude sky.

Person illuminated by a small light beneath the Milky Way at Salar de Uyuni, showing scale and detail against the salt flat

Salar de Uyuni Milky Way Bolivia Astrophotography

The second image includes a person illuminated by a small light source. This provides a clear sense of scale against the immense salt flat and highlights how the Milky Way and airglow dominate the high-altitude night sky.

Southern hemisphere Milky Way and airglow above Salar de Uyuni salt flat at high altitude

Southern hemisphere night sky Milky Way Bolivia Astrophotography

The third image highlights the richness of the southern Milky Way combined with subtle airglow colors — a signature of extremely dark, high-altitude observing sites. The Crux constellation (Southern Cross) is especially well defined here, as this frame was captured with a tighter field of view and moderate zoom rather than as part of a wide panoramic sweep.

With over 10,500 km² of salt, more than 10 billion tons of crystalline deposits, and up to 70% of the world’s known lithium reserves, Salar de Uyuni is not only a geological wonder, but also one of the most extraordinary natural platforms for night-sky photography on Earth.

Tuesday, March 13, 2018

Crux (Southern Cross), Milky Way and Palm Tree - Galapagos Night Sky Astrophotography

The Galápagos Islands offer a rare opportunity to photograph the southern night sky from an equatorial location. In this image, the sky is filled with southern-hemisphere highlights rarely visible from mid-northern latitudes.

Prominently visible are Alpha Centauri — the closest stellar system to our Solar System — the distinctive Crux (Southern Cross) constellation, and the faint glow of the South Celestial Pole. A palm tree in the foreground provides a natural tropical frame, emphasizing the unique location and latitude.

Crux Southern Cross Milky Way and palm tree over Galapagos Islands equatorial night sky astrophotography

Crux (Southern Cross), Milky Way and Palm Tree - Galapagos Night Sky Astrophotography

Image details:
Panorama of 3 frames
Canon EOS 60Da · Canon EF 16–35mm f/2.8L II USM
16 s · f/2.8 · ISO 6400
Puerto Villamil, Isabela Island, Galápagos, Ecuador

The South Celestial Pole in this image is located using two independent geometric methods. The first method uses the Crux (Southern Cross) constellation: a line extended along the long axis of Crux points toward the south celestial pole.

The second method uses Alpha Centauri and Beta Centauri. By drawing an imaginary line connecting these two bright stars and then constructing a perpendicular line through the midpoint between them, this perpendicular also points toward the south celestial pole.

When both constructions are applied to the same image, the Crux axis line and the Centauri perpendicular intersect very close to the south celestial pole. The annotated image above shows this intersection clearly.

Annotated southern sky showing Crux axis and Alpha Beta Centauri perpendicular intersecting at the South Celestial Pole

The South Celestial Pole - Galapagos Equator Sky - Annotated

From this image, the south celestial pole appears very close to the horizon. Because Isabela Island lies on the equator, this photograph captures a true equatorial sky — a rare vantage point where the geometry of Earth and the celestial sphere becomes visually apparent.

Related Galápagos & Equatorial Sky Astrophotography:

Tuesday, March 6, 2018

Sky Ladder - Galapagos Nightscape Astrophotography

The night sky over the Galápagos Islands is one of the darkest and most pristine I have ever experienced. Based on the Bortle scale, the sky quality was extremely close to Class 1 — an excellent dark-sky site. Under these conditions, clouds appear only as dark voids against the star-filled sky, and airglow is clearly visible to the naked eye.

Surprisingly, I had seen very few night-sky photographs from the Galapagos before this trip. Yet once you experience the darkness firsthand, it becomes clear that astrophotography is a natural extension of the islands’ unique appeal. As awareness grows, nightscape astrophotography may well become another attraction of the Galápagos.

Sky Ladder Milky Way nightscape from the Galápagos Islands under near Bortle 1 dark skies with visible airglow

Sky Ladder - Galapagos Nightscape Astrophotography

The image is titled “Sky Ladder”. In the foreground, a simple ladder leads upward toward the observer’s platform. As the ladder ends, the Milky Way continues its path across the sky, creating the illusion that the ladder itself ascends directly into the galaxy. This natural alignment transforms an ordinary object into a symbolic bridge between Earth and the cosmos.

Canon EOS 60Da, Canon EF 16–35mm f/2.8L II USM
30 seconds · f/2.8 · ISO 6400
Puerto Villamil, Isabela Island, Galápagos, Ecuador
Nightscape Astrophotography

Related Astrophotography Posts:

Galápagos Astrophotography Series:
Equatorial Sky & Airglow: Why the Equatorial Sky Glows More Red — Tanzania & Galápagos
Minimalist Nightscape Astrophotography: Drive Safely Between the Milky Way and the Haystack

Notes:

Another defining feature of this photograph is its equatorial location. As I later observed in Tanzania, airglow near the equator often appears more reddish compared to higher latitudes. Combined with the Galápagos’ isolation — far from continental light pollution — the result is a uniquely rich and atmospheric night sky.

Monday, May 9, 2016

Peru Astrophotography

Finally, my dream happens and I was able to see south sky – Southern Cross, Alpha Centauri, Large Magellanic Cloud etc. These photos were done during my trip to Peru, Central Andes, near Inca sacred valley and Cusco city - Chinchero village. I had limited time for astrophotography during shopping time of our women. Altitude is about 3,762 m or 12,339 ft. At such altitude the sky absolutely amazing! You really feel that stars are much closer.

Canon EOS 60Da, EF16-35mm f/2.8L II USM lens, ISO-4000, f/2.8, 30 seconds. on this photo you can see Alpha Centauri which is the closest star to the Sun, just 4.37 light-years. Thinking about next vacation :)

Peru Astrophotography - Milky Way and Alpha Centauri

Canon EOS 60Da, EF16-35mm f/2.8L II USM lens, ISO-4000, f/2.8, 30 seconds. Peru is on South hemisphere and on the photo you can find the south pole (3 1/2 times the distance between Gacrux and Acrux).