Eta Aquarid Meteor Shower Peaks May 5-6: Halley's Comet Debris Lights Up Pre-Dawn Sky

Key facts

• The Eta Aquarid meteor shower is active from April 19 to May 28, 2025, peaking overnight on May 5-6.
• The shower originates from debris left by Halley's Comet (1P/Halley), which orbits the Sun every 76 years.
• Maximum rate: about 50 meteors per hour under clear skies, according to the American Meteor Society.
• Meteors travel at approximately 41 miles (66 km) per second.
• Best viewing time: around 4 a.m. local time on May 6, when the radiant in Aquarius is highest.
• Southern Hemisphere observers may see up to 60 meteors per hour; northern observers may see 10-30 per hour.
• A waning gibbous moon will be present during the peak, potentially washing out fainter meteors.
• The shower's radiant is near the constellation Aquarius, but meteors can appear across the entire sky.

A Celestial Display from Halley's Comet

Earth is currently traversing a stream of debris left by Halley's Comet, giving rise to the annual Eta Aquarid meteor shower. The shower, which began on April 19 and continues through May 28, reaches its peak overnight on May 5-6, offering skywatchers a chance to see dozens of shooting stars per hour. The chunks of space debris that create the Eta Aquarids come from a celestial icon: Halley's Comet, which orbits the Sun every 76 years. As the comet approaches the Sun, ice beneath its surface sublimates, ejecting dust that eventually spreads along its orbital path. When Earth passes through that material, particles burn up in the atmosphere, producing bright streaks across the sky.

Peak Viewing: Timing and Location Matter

The best time to view the shower is before dawn on May 6, when the radiant—the point from which meteors appear to originate—is highest in the sky. The American Meteor Society recommends around 4 a.m. local time for optimal viewing. The radiant lies near the constellation Aquarius, which rises in the hours after midnight. Latitude plays a crucial role in visibility. The Eta Aquarids are best observed from the Southern Hemisphere, where the radiant climbs higher, yielding up to 60 meteors per hour. Northern Hemisphere observers can expect 10 to 30 meteors per hour, with those closer to the equator seeing more. the shower will also be visible in parts of Russia, with experts advising viewers to look toward the southeastern horizon.

Moonlight Interference: A Challenge for Northern Observers

This year, the peak coincides with a bright waning gibbous moon, which can wash out fainter meteors. However, there is a strategic advantage: because Earth spins from west to east, the moon and Aquarius will be on opposite sides of the sky during the pre-dawn peak. The moon will be heading toward the western horizon while Aquarius rises in the east. Viewers can reduce glare by turning their backs to the moon or positioning a large object—such as a tree or building—between themselves and the moon. The moon becomes less of a problem as May progresses, and the shower continues, albeit at a waning rate, until around May 27 or 28.

How to Maximize Your Meteor-Watching Experience

No special equipment is needed to enjoy the Eta Aquarids. The key is to find the darkest possible location away from city lights, lean back, and take in as much sky as possible. Allow at least 30 minutes for your eyes to adjust to the dark. Avoid using your phone or any white light; if you need a flashlight, use a red light setting to preserve night vision. Do not stare directly at Aquarius. Meteors closer to the radiant have shorter trains and are harder to spot. Instead, let your gaze wander across nearby constellations to catch the longer, more spectacular streaks. Patience is essential—the show unfolds over hours.

Broader Context: Earth's Annual Dance with Cometary Debris

The Eta Aquarids are one of several meteor showers that Earth encounters each year as it orbits the Sun. These showers occur when the planet passes through streams of debris left by comets or asteroids. The regularity of these events—occurring at the same time each year—reflects the predictable geometry of our solar system. Halley's Comet, the parent body of the Eta Aquarids, also produces the Orionid meteor shower in October. The comet itself will next be visible from Earth in 2061. For now, its legacy continues in the form of fast, bright meteors that often leave long, visible trails across the sky.

Outlook: Opportunities Beyond the Peak

Even if cloudy skies or moonlight interfere with the peak, the shower remains active for several more weeks. a broader period of increased activity from May 3 to May 10, during which observers may see 30 or more meteors per hour. After that, rates gradually decline until the shower ends in late May. For those who miss the display entirely, the month of May also offers other celestial events, including two full moons—a rare occurrence. Skywatchers are encouraged to keep looking up; the universe rarely disappoints those who wait.

The bottom line

• The Eta Aquarid meteor shower peaks on the night of May 5-6, 2025, with best viewing before dawn on May 6.
• The shower is caused by debris from Halley's Comet, which orbits the Sun every 76 years.
• Southern Hemisphere observers may see up to 60 meteors per hour; northern observers may see 10-30 per hour.
• A bright waning gibbous moon may obscure fainter meteors, but turning away from the moon can help.
• No special equipment is needed; find a dark location, allow 30 minutes for dark adaptation, and look away from the radiant.
• The shower remains active until May 28, with a broader peak period from May 3 to May 10.