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The Milky Way and Yellowstone's Fiery Heart

Milky Way over Yellowstone
Image: NASA / Dave Lane
Quick answer · as of 17 Aug 2026

A celestial view over Yellowstone's Silex Spring captures the Milky Way's grandeur, showcasing the interplay of cosmic and geothermal forces.

The image captures the Milky Way arching over Silex Spring in Yellowstone National Park. This vibrant hot spring, illuminated by artificial light, is a testament to the geothermal activity beneath the Earth's crust. The colours are due to thermophilic bacteria thriving in the hot water, while steam rises from the spring, heated by the Yellowstone Hotspot. Above, the Milky Way's central band, a dense region of stars, stretches across the sky, reminding us of our place in the universe.

Connecting Earthly Wonders to Cosmic Phenomena

Yellowstone's geothermal features are a result of the same tectonic forces that shape our planet's surface. The Yellowstone Hotspot is a mantle plume, a column of hot rock rising from deep within the Earth, responsible for the park's geysers and hot springs. Meanwhile, the Milky Way provides a backdrop of cosmic scale, with billions of stars forming the galaxy's central band. This juxtaposition of terrestrial and celestial phenomena highlights the interconnectedness of natural forces. For those interested in tracking celestial objects, the Orbital Radar pass predictor can help locate satellites as they traverse the night sky.

Frequently Asked Questions

What causes the colours in Silex Spring?
The colours are caused by layers of bacteria that thrive in the hot water of the spring.
What is the Yellowstone Hotspot?
The Yellowstone Hotspot is a mantle plume beneath the Earth's crust, responsible for the park's geothermal features.
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