In our previous article, we explored the many celestial treasures waiting to be discovered in the 2026 Denver night skies. But knowing when to look up can make all the difference in what you see. Timing your stargazing sessions is just as important as choosing your targets. In this guide, we’ll help you plan your observing calendar by breaking down the best times to view each type of object or event. Barring clear skies and cooperative weather, the ideal moments to observe often depend on three key factors: the phase of the Moon, the ever-changing positions of the planets in our solar system, and Earth’s seasonal journey around the Sun. Here’s your month-by-month look at the best times in 2026 to experience the wonders of the night sky—and don’t miss our companion post, Where to Explore the 2026 Denver Night Skies.

The Moon Phases

Regardless of whether the Moon is the target of your observation or an impediment to dark sky objects you’re trying to view, the Moon’s phases are an important factor in when to plan your observations. The Moon’s phases are not only visually captivating but also provide opportunities to observe specific lunar features. The terminator’s shifting shadows create a dynamic viewing experience throughout the month, making each phase of the Moon worth exploring.

• Craters and Mountains: These are best observed around the first and last quarter phases. The sharp shadows along the terminator (the line between light and dark) highlight the rugged lunar surface.
• Maria (Lunar Seas): These dark plains are most prominent during the waxing crescent and waning crescent phases when the sunlight glances across their surfaces.
• Full Moon: While the full moon washes out fainter celestial objects, its bright, fully illuminated surface is ideal for casual observation and photography.

Bold type indicates moon within 2 days of perigee (it’s closest to Earth). Red type indicates a lunar eclipse.

The 4 or so days on either side of a New Moon are the best times to plan for the viewing of fainter objects in the night sky to avoid the light pollution reflected by the moon. The Denver Astronomical Society plans Dark Sky Weekends that correspond to these times when the moon won’t impede observing at the Kline-Dodge Dark Sky Site in Deer Trail, east of Denver. These weekends are also when the DAS plans orientations for new members. Weather permitting, here are the planned Dark Sky Weekends at the Kline-Dodge Dark Sky Site.

Solar System Orbits

The planets (plus moons, minor bodies, and occasional comets) travel along their orbits each year, and their relative positions govern when—and how well—we can see them from Denver. In this section, we’ll outline the optimal viewing windows in 2026 for each planet, plus a few key alignments and events to keep on your radar.

Mercury

Look for Mercury during its greatest elongations—the times when it appears farthest from the Sun in the sky (either after sunset or before sunrise). Those are your best opportunities to spot it against a darker backdrop. In 2026, Mercury will also participate in the six-planet parade on February 28—a rare highlight. Mercury is always low and short-lived; plan for a clear western horizon and use binoculars early in the apparition. Watch for Mercury’s greatest elongation (evening) — February 19, 2026. Good evening apparition shortly after sunset; watch low on the west horizon about 30–60 minutes after sunset.

Venus

Venus will dominate the evening sky in the first half of 2026, shining brilliantly after sunset. Its greatest elongation occurs on May 31. Later in the year, it transitions to the morning sky before dawn. Venus will be the brightest “star” in the western evening sky around mid-August; excellent for naked eye and binocular observing, and an easy target even in suburban skies. Look for Venus’ greatest eastern elongation (evening) — August 14–15, 2026. Venus will be high and brilliant in the evening sky around this date, making it an excellent target for casual observers.

Mars

Mars will be visible through much of the year, though its brightness varies. It will be best observed in the early months (January–April), when it’s closer to Earth and showcases more detail. As it recedes, its contrast against the night sky becomes more subdued. 

Jupiter

Jupiter is one of the showpieces of the 2026 sky. It reaches opposition on January 10, 2026, meaning Earth lies between Jupiter and the Sun—making it visible all night, rising as the Sun sets. Catch Jupiter’s Opposition on January 10, 2026. Jupiter is opposite the Sun (best all-night visibility) around this date—excellent time for observing the planet, its cloud bands, and Galilean moons. Jupiter will dominate the late-night/early-morning sky around opposition. A small telescope easily shows bands and moons; track the Galilean moons over multiple nights for motion.

Saturn

Saturn will be present in the evening sky. While not nearly as edge-on as they had been in 2025, Saturn’s rings will become more visible in 2026, so they may still appear narrow even through a telescope. Still, its moons—especially Titan—remain rewarding targets to track. Saturn will reach Opposition on October 4, 2026. Saturn reaches opposition in early October, good for ring and moon observing. Note: 2026 is a year when Saturn’s rings are viewed nearly edge-on, so the rings may appear very narrow or partially foreshortened. 

Uranus & Neptune

These distant ice giants require binoculars or a telescope. Their best visibility comes at opposition, when the planet is fully illuminated from Earth’s perspective. Keep an eye on astronomy calendars for the precise dates. These outer planets require binoculars or a telescope and are best viewed at opposition. Catch Uranus at Opposition on November 25, 2026. Best time to view Uranus all night; requires binoculars or a telescope to resolve as a disk. Uranus is faint (mag ~5.7–5.9) — binoculars will show it as a tiny, steady point; a telescope will reveal its bluish-green disk. Neptune reaches Opposition on September 25, 2026. Neptune is a true telescope target (mag ~7.8–8). A finder chart or app is essential to pick it out among background stars.

2026 Celestial Alignments:

The Earth’s Seasons

The visibility of many constellations and the stars, clusters, galaxies, and nebula contained in their boundaries depends on the time of year, though some constellations are visible year-round in Denver:

• All Year Round: There are Circumpolar Constellations in the sky that never set below the horizon making them visible throughout the seasons. In Denver, they include Ursa Major (including the asterism of the Big Dipper), Ursa Minor (containing Polaris, the North Star), Cassiopeia, Cepheus, and Draco.
• Winter (January to March): Orion, Taurus, Gemini, Canis Major, Canis Minor, Auriga, Perseus, Lepus, Eridanus, and Monoceros dominate the evening sky.
• Spring (April to June): Virgo, Leo, Boötes, Hydra, Corvus, Crater, Libra, Canes Venatici, and Coma Berenices rise to prominence, along with the Big Dipper, which is high in the sky.
• Summer (July to September): The Summer Triangle—formed by Vega, Altair, and Deneb—is a highlight, along with Scorpius, Sagittarius, Ophiuchus, Hercules, Lyra, Cygnus, Aquila, Delphinus, and Vulpecula in the southern sky.
• Fall (October to December): Pegasus, Andromeda, Pisces, Aquarius, Aries, Cetus, Triangulum, Capricornus, and Pisces Austrinus take center stage. The Andromeda Galaxy is also well-placed for observation.

Also dependent on the seasons are the meteor showers that appear to radiate from specific constellations as the earth passes through the paths of comet or asteroid debris while orbiting the sun. These annual events provide dazzling displays. Here is a list of the best meteor showers of 2026:

Bold type indicates the strongest predicted showers. * Strong moonlight will interfere.

Keep Looking Up

Denver’s dark skies offer incredible opportunities for observation throughout 2026. Mark your calendars for these celestial events and plan your stargazing sessions accordingly. Be sure to read our companion posts where we dive into what objects and events to view in Denver for 2026 and best locations in Denver and surrounding areas to observe these celestial targets, helping you make the most of your stargazing experience. Clear skies and happy stargazing!