We basically haven't seen anything like it before
Once every 170,000 years, a wandering piece of the outer solar system brushes close enough to the Sun to announce itself with light. This week, that moment belongs to New Zealand, where Comet C/2025 R3 PanSTARRS is tracing a brief, luminous arc across the western sky before retreating into the deep dark from which it came. It will not return within any human reckoning of time — and so the invitation, for those who look up, carries the particular weight of the unrepeatable.
- A comet on a 170,000-year orbit is passing through Southern Hemisphere skies right now, and the viewing window is measured in days, not weeks.
- Amateur astronomers and photographers across New Zealand are racing against a horizon that swallows the comet quickly each evening, leaving only minutes of viable shooting time.
- Capturing it demands patience and technique — stacking multiple long exposures to coax a glowing coma and faint tail out of the darkness — and even then, the result can be frustratingly subtle.
- The clearest path to seeing it is simple but specific: head to the west coast, find an open horizon, and be in position roughly one hour after sunset.
- As the comet moves away from the Sun it is already dimming, and astronomers estimate it will fade from reach entirely within seven to ten days.
For the next week or so, New Zealand is hosting a visitor on a 170,000-year orbit. Comet C/2025 R3 PanSTARRS — a long-period comet originating from the far edges of the solar system — is currently visible in the Southern Hemisphere sky, and the window to see it is closing fast.
Josh Aoraki, an astronomer at Te Whatu Stardome, describes it as something no living person has ever encountered before. The comet won't resolve to the naked eye, but cameras, binoculars, and telescopes can reveal its coma — the glowing gas envelope surrounding its icy core — and the tail of material streaming away under the Sun's radiation.
In Wellington, photographer Brian Diettrich has already been out chasing it, capturing the comet passing over the city on a Friday evening. The process involves stacking multiple 30-second to one-minute exposures to draw out detail — a method he describes as "a little bit stressful" given how quickly the comet drops below the horizon each night.
The recommended approach is to head to New Zealand's west coast, find a clear and unobstructed view of the western horizon, and arrive about an hour after sunset. Even a smartphone can pick something up, though the result may be little more than a smudge with a hint of tail.
Aoraki estimates roughly a week remains — perhaps stretching to ten days — before the comet dims beyond reach. After that, the next opportunity to see it lies thousands of generations away.
For the next week or so, New Zealand has a visitor that won't return for 170,000 years. Comet C/2025 R3 PanSTARRS is moving through the Southern Hemisphere sky right now, and anyone with a camera, binoculars, or telescope has a narrow window to see it before it fades away.
It's the kind of celestial event that doesn't come around in a human lifetime. Josh Aoraki, an astronomer at Te Whatu Stardome, describes it as a "long-period comet"—an icy body that travels from the far reaches of the solar system on an orbital path that takes roughly 170,000 years to complete. "We basically haven't seen anything like it before," he said. The comet won't be visible to the naked eye, but it's bright enough that standard camera equipment can capture it. Photographers will be able to see the coma, the glowing fuzzy envelope of gas surrounding the comet's core, and the tail—that stream of material being pushed away from the center by the Sun's heat. It's a rare glimpse of an icy body interacting with the Sun's radiation across the vacuum of space.
Across New Zealand, amateur astronomers have already been out chasing it. Brian Diettrich, a photographer in Wellington, managed to capture the comet passing over the city on a Friday evening. He'd been waiting for the chance. "Everyone's been out there trying to grab it. It's been pretty exciting," he said. But there's urgency to it. The comet drops below the horizon quickly each evening, leaving only a short window for photography. Diettrich describes the process: taking a series of 30-second or one-minute exposures and stacking them together to bring out the comet's details. "It is a little bit stressful," he acknowledged.
The best strategy is straightforward. Head west. An hour after sunset, position yourself somewhere with a clear, unobstructed view of the western horizon. Beaches along New Zealand's west coast offer the clearest vantage points—nothing between you and the horizon to block the view. Aoraki emphasized that any obstruction, whether trees or buildings, puts you at a disadvantage. Even a smartphone camera can pick it up, though Diettrich warns it will appear as "a bit of a smudge" with maybe a hint of tail visible.
The clock is ticking. As the comet moves away from the Sun, it will gradually dim and fade from view. Aoraki estimates there's roughly a week, possibly stretching to ten days, before it disappears entirely. After that, the next person to see this comet won't be born for thousands of generations. The window is narrow. The opportunity is real.
Notable Quotes
We basically haven't seen anything like it before— Josh Aoraki, Te Whatu Stardome astronomer
Everyone's been out there trying to grab it. It's been pretty exciting— Brian Diettrich, amateur photographer
The Hearth Conversation Another angle on the story
Why does this comet matter so much to people? It's not like it's going to hit us.
It's not about danger. It's about rarity and perspective. This thing won't come back for 170,000 years. That's longer than human civilization has existed. You're looking at something that no one alive will ever see again.
But you need equipment to see it. It's not like a meteor shower where you just look up.
True, but that's part of what makes it accessible. You don't need a telescope. A camera works. A phone works. It lowers the barrier. And there's something about the hunt itself—the timing, the location, the stacking of images. It becomes an event.
What's the actual science people are seeing when they look at it?
The coma and tail. The coma is gas and dust boiling off the comet as the Sun heats it. The tail is that material being pushed away by solar radiation. You're literally watching an icy body from the outer solar system react to the Sun's energy. It's physics made visible.
So it's fading now. How much longer realistically?
A week, maybe ten days. After that, it's gone. The comet keeps moving away from the Sun, and as it does, it cools and dims. There's no second chance this week.
Where should someone actually go to see it?
West coast, an hour after sunset. You need an unobstructed western horizon. Beaches are ideal. Anywhere with trees or buildings blocking the view puts you at a disadvantage. The comet doesn't stay high in the sky for long.