Denver is known for its breathtaking landscapes, vibrant culture, and a sky that often dazzles with incredible natural phenomena. Among these natural wonders, few events compare to the awe-inspiring sight of a solar or lunar eclipse. For those who live in or visit the Mile-High City, eclipses present a unique opportunity to witness celestial mechanics at play and appreciate the beauty of our solar system.

In this post, we’ll take an in-depth look at the eclipses visible from Denver, Colorado, including the science behind them, historical significance, and practical advice on how to safely enjoy these mesmerizing events. Whether you’re a seasoned skywatcher or a newcomer to the world of eclipses, you’ll find everything you need to know to make the most of these rare and awe-striking occurrences.

What is an Eclipse?

The Two Types of Eclipses

An eclipse occurs when one celestial body moves into the shadow of another, temporarily blocking the light or visibility of the object behind it. There are two main types of eclipses that can be observed from Earth: solar eclipses and lunar eclipses.

1. Solar Eclipses

A solar eclipse occurs when the Moon passes directly between the Earth and the Sun, casting a shadow over part of the Earth. The Moon’s shadow can create three types of solar eclipses:

  • Total Solar Eclipse: The Moon completely covers the Sun, creating an eerie twilight during the day.
  • Partial Solar Eclipse: Only a portion of the Sun is obscured by the Moon.
  • Annular Solar Eclipse: The Moon is too far from Earth to completely cover the Sun, leaving a ring-like effect around the edges of the Moon.

2. Lunar Eclipses

A lunar eclipse occurs when the Earth passes between the Sun and the Moon, casting its shadow onto the Moon. There are two primary types of lunar eclipses:

  • Total Lunar Eclipse: The entire Moon passes through Earth’s shadow, often turning a reddish color due to the scattering of sunlight through Earth’s atmosphere.
  • Partial Lunar Eclipse: Only part of the Moon moves through the Earth’s shadow, creating a partial darkening of the lunar surface.
  • Penumbral Lunar Eclipse: The Moon passes through the outer part of Earth’s shadow, causing a subtle dimming that can be hard to notice without keen observation.

Both solar and lunar eclipses are fascinating phenomena that captivate skywatchers around the world. In Denver, Colorado, residents and visitors alike can enjoy these celestial spectacles when the timing and conditions are right.

Eclipses Visible in Denver, Colorado

Solar Eclipses in Denver

1. The 2017 Total Solar Eclipse: A Historic Event

On August 21, 2017, a total solar eclipse passed across the United States, and Denver was fortunate enough to experience a near-total eclipse. Although the path of totality—the area where the Sun was completely covered by the Moon—did not pass directly over Denver, the city witnessed an incredible 92% obscuration of the Sun.

During this event, Denver residents gathered in parks, streets, and open spaces, donning special eclipse glasses to safely view the phenomenon. As the eclipse progressed, the temperature dropped, and the sky took on an eerie twilight hue, adding to the surreal nature of the event. For those who couldn’t make it to the path of totality, the partial eclipse in Denver was still a remarkable sight, and the experience of a solar eclipse is something many will remember for a lifetime.

2. Upcoming Solar Eclipses Visible in Denver

While Denver won’t be directly in the path of totality for the next few solar eclipses, there will still be some incredible opportunities to witness partial eclipses. Here’s a look at the upcoming solar eclipses visible in Denver:

April 8, 2024 – Total Solar Eclipse (Partial in Denver)

  • Visibility: The path of totality will pass through parts of Mexico, the United States, and Canada. While Denver will not be in the path of totality, the city will experience a partial solar eclipse. Approximately 90% of the Sun will be obscured by the Moon, offering a stunning view, albeit not the full totality experience.
  • Time: The eclipse will begin around 11:30 AM local time and reach its peak at 1:00 PM. It will end by 2:30 PM.

For this solar eclipse, it is crucial to use proper eye protection, such as eclipse glasses, to safely observe the phenomenon.

August 12, 2045 – Total Solar Eclipse (Partial in Denver)

  • Visibility: Although the path of totality will not pass directly over Denver, the city will witness a partial solar eclipse. For those willing to travel to the path of totality, cities like Denver will see a significant, though not complete, obscuration of the Sun.
  • Time: As this eclipse is a long time away, specific details regarding timing and visibility will be determined closer to the event.

Lunar Eclipses in Denver

1. The May 2021 Total Lunar Eclipse

On May 26, 2021, Denver experienced a total lunar eclipse. This eclipse was visible in full from the city, with the Moon passing completely into the Earth’s shadow, turning a reddish hue during the peak of the eclipse. Denverites were treated to a dramatic view of the “blood moon,” a rare and stunning sight that many had been eagerly anticipating.

2. Upcoming Lunar Eclipses Visible in Denver

Lunar eclipses are a regular occurrence, and Denver will be able to witness several over the coming years. Here are some notable upcoming lunar eclipses:

November 8, 2022 – Total Lunar Eclipse

  • Visibility: This total lunar eclipse will be visible in Denver, providing an excellent opportunity to see the “blood moon.” The Moon will gradually move into the Earth’s shadow, changing color as it progresses through the eclipse.
  • Time: The eclipse will begin around 3:00 AM local time, with totality occurring at 4:00 AM. The eclipse will end by 6:00 AM.

May 5, 2025 – Penumbral Lunar Eclipse

  • Visibility: This penumbral eclipse will be visible from Denver as a subtle dimming of the Moon. Though it may not be as dramatic as a total lunar eclipse, it still offers a unique opportunity for skywatchers to observe how the Earth’s shadow affects the Moon.
  • Time: The penumbral eclipse will begin around 6:30 AM and end by 8:30 AM local time.

May 16, 2022 – Total Lunar Eclipse

  • Visibility: This will be another total lunar eclipse visible from Denver, with the Moon passing completely through the Earth’s shadow and taking on the reddish hue for which blood moons are famous.
  • Time: The eclipse will begin around 10:30 PM local time and last until 1:30 AM the next day.

How to Safely Observe Eclipses in Denver

Solar Eclipse Viewing: Protect Your Eyes

One of the most important aspects of viewing solar eclipses is eye safety. Looking directly at the Sun, even when it is partially obscured by the Moon, can cause permanent eye damage. To safely view a solar eclipse, always use eclipse glasses that meet the international standard for eye protection (ISO 12312-2).

If you don’t have access to eclipse glasses, you can create a pinhole projector to safely view the eclipse’s progression. This simple device allows sunlight to pass through a small hole and project an image of the eclipse onto a surface.

Lunar Eclipse Viewing: A Simpler Experience

Lunar eclipses are much easier to view than solar eclipses, as they do not pose any risk to your eyes. You can simply find a dark spot, away from city lights, to get the best view of the eclipse. Bring a blanket or lawn chair, and enjoy the experience with friends and family. A pair of binoculars or a telescope can enhance the view, but even with the naked eye, a lunar eclipse is a spectacular sight.

Best Locations in Denver for Viewing Eclipses

Denver offers plenty of excellent spots for observing both solar and lunar eclipses. Some top locations include:

  • City Park: A large, open space with a clear view of the sky.
  • Red Rocks Amphitheatre: A scenic spot with unobstructed views of the horizon, perfect for watching celestial events.
  • Chautauqua Park: Located near Boulder, this park offers panoramic views of the sky.
  • Lookout Mountain: A high vantage point that provides great views of the city and the surrounding sky.

Preparing for Eclipses in Denver

When preparing for an eclipse, whether solar or lunar, it’s important to check the exact timing of the event in your local area. Weather conditions can impact visibility, so make sure to have backup plans in case clouds interfere with your view. Also, bring along necessary items such as:

  • A comfortable chair or blanket
  • A camera or binoculars
  • Sunscreen and water (for daytime solar eclipses)
  • A hat or other sun protection

Conclusion: Embrace the Celestial Wonders of Denver

Eclipses offer a unique opportunity to witness one of nature’s most spectacular phenomena, and in Denver, skywatchers are lucky to experience these events in such a picturesque setting. Whether you’re observing a solar or lunar eclipse, the experience of watching the skies shift and change is one that is both humbling and awe-inspiring.

As you plan your next eclipse viewing in Denver, remember to stay safe, respect the celestial event, and take time to appreciate the beauty of the universe. With upcoming eclipses on the horizon, there’s no better time to start making plans for these incredible experiences.