The Moon doesn't have to be in your direct line of sight.
Each May, Earth drifts through the ancient debris of Halley's Comet, and the sky offers its usual invitation to look up — but the cosmos rarely arranges itself for our convenience. This year, a full moon arrives at precisely the wrong moment, dimming the Eta Aquariids even as a newly discovered comet, a planetary conjunction, and a rare blue micromoon quietly fill the rest of the month with their own quiet rewards. The sky in May is less a spectacle than a negotiation, asking observers to weigh what the light takes away against what patience and a pair of binoculars might still reveal.
- A full moon crashes the Eta Aquariids' peak, cutting the expected meteor count from up to 30 per hour down to a modest 5 to 10 — the lunar calendar and the comet's debris trail simply don't align this year.
- Optimistic forecasts of 50 meteors an hour circulating online are theoretical fictions, based on conditions no real observer in Australia will actually experience.
- Comet C/2025 R3 PanSTARRS offers a consolation prize — glowing blue-green in the western sky after sunset, it asks only for binoculars and no early alarm.
- Venus and Jupiter are drawing visibly closer each evening, building toward a striking conjunction around June 9–10 that will make them the two brightest objects in the night sky.
- May closes with a blue micromoon on the 31st — the second full moon in a single calendar month, a small astronomical rarity that arrives roughly once every two and a half years.
May arrives with a promise the Moon will break. The Eta Aquariids meteor shower peaks in the first week, but a full moon hangs in the sky at almost exactly the wrong moment, washing out most of what would otherwise be a decent show. Earth passes through the dust trail left by Halley's Comet every May, and under truly dark skies you might see 20 to 30 meteors an hour — but with the Moon still bright and waning, Melbourne Planetarium astronomer Tanya Hill puts that count at somewhere between 5 and 10. The best window is the hour or two before dawn on May 6 and 7, when the radiant point near the star Eta Aquarii sits high enough to observe before sunrise swamps the sky.
The online estimates claiming 50 meteors an hour are misleading, according to astrophysicist Jonti Horner of the University of Southern Queensland. Those figures assume perfect darkness, perfect eyesight, and ideal geometry — conditions Australia won't meet. Still, Horner suggests it's worth stepping outside if you're already awake before dawn. Next year will be better; the new moon falls on May 6 in 2027, leaving the sky dark and generous.
For those unwilling to set an alarm, comet C/2025 R3 PanSTARRS offers an easier reward. Glowing blue-green in the western sky just after sunset, it shines at magnitude 5.2 — borderline for the naked eye but clear through binoculars. Astrophotographers have already captured it in striking detail. Meanwhile, Venus and Jupiter are converging in the evening sky, closing toward their nearest approach around June 9 or 10, when Venus will dominate so completely that Jupiter's own brilliance will seem dim beside it.
May bookends itself with two full moons — the Flower Moon on the 2nd and a blue moon on the 31st. The name has nothing to do with colour; it simply marks the second full moon in a single calendar month, a consequence of the 29.5-day lunar cycle that produces this coincidence roughly once every 2.5 years. Both moons also qualify as micromoons, reaching fullness near the Moon's farthest point from Earth, making them slightly smaller and dimmer than a supermoon — though the difference is subtle enough that most observers won't notice. May's sky, in the end, is a study in trade-offs: one spectacle dimmed by lunar glare, and several quieter wonders waiting for anyone willing to look.
May arrives with a promise the Moon will break. The Eta Aquariids meteor shower, that reliable annual visitor, peaks in the first week of the month—but this year a full moon will be hanging in the sky at almost exactly the wrong moment, washing out most of what would otherwise be a decent show. The timing is the problem. Earth passes through the dust trail left by Halley's Comet every May, and particles burn up in the atmosphere to create the meteors. Under truly dark skies with perfect conditions, you might see 20 to 30 of them in an hour. But the full moon, still bright and waning, will compete with the faint streaks of light. Tanya Hill, an astronomer at the Melbourne Planetarium, puts the math plainly: that 20-to-30 count drops to somewhere between 5 and 10 when the Moon is up. The best window is the hour or two before dawn on May 6 and 7, when the radiant point—the spot in the sky from which the meteors appear to originate, near the star Eta Aquarii in Aquarius—is high enough to see but the Sun hasn't yet drowned everything out.
The online estimates you'll find claiming 50 meteors an hour are misleading, according to Jonti Horner, an astrophysicist at the University of Southern Queensland. Those numbers come from something called the zenithal hourly rate, a theoretical measure that assumes perfect darkness, perfect eyesight, and the radiant point directly overhead. Australia's actual conditions fall well short of that ideal. Still, Horner suggests that if you're already awake before dawn—coffee in hand, wrapped against the cold—it's worth stepping outside and looking up. The meteors will be there, just fewer of them. Next year will be better. The new moon falls on May 6 next year, leaving the sky dark and generous. For now, if you can't stomach the early morning and the poor odds, there are other things worth watching.
Comet C/2025 R3 PanSTARRS is glowing in the western sky just after sunset, having swung around the Sun in late April. The comet has a blue-green tint and currently shines at magnitude 5.2, which means it's visible under dark skies but borderline for the naked eye. Binoculars will show it clearly. Astrophotographers have already captured it in detail—Ron Webb and others with high-end cameras and zoom lenses have recorded long-exposure images, while those with small telescopes are pulling in even finer detail. The comet is an easier target than the meteors and requires no alarm clock.
Venus and Jupiter are also in the evening sky, and they're on a collision course. Venus is unmistakably bright in the western sky after sunset. Jupiter, higher in the northwest, appears to be approaching it from our vantage point. Over the next six weeks, the two planets will swing closer together, reaching their closest approach around June 9 or 10. By then the Moon will have set, making Venus and Jupiter the brightest objects in the night sky. The difference in brightness between them will be striking—Venus will dominate in a way that makes Jupiter's own brilliance seem dim by comparison.
May bookends itself with a pair of full moons. The first, the Flower Moon, rose on May 2. The second arrives on May 31. When two full moons occur in a single calendar month, the second one is called a blue moon—a name that has nothing to do with color. Because the lunar cycle runs 29.5 days, blue moons are relatively rare, happening roughly once every 2.5 years. Both of May's full moons will also qualify as micromoons by some definitions, meaning they'll reach fullness when the Moon is near its apogee, its farthest point from Earth. This makes them smaller and dimmer than a supermoon, though the difference is subtle enough that most observers won't notice. The sky in May, then, is a study in trade-offs: the meteor shower compromised by lunar glare, but the comet, the planets, and the rare double full moon offering their own rewards to anyone willing to look.
Citas Notables
Under ideal conditions you'd expect 20–30 meteors an hour, in the hour before dawn, but the Moon drops this right down to only about 5–10— Tanya Hill, astronomer at Melbourne Planetarium
If you've got to be at work before dawn, take your coffee outside, sit down, wrap up warm— Jonti Horner, astrophysicist at University of Southern Queensland
La Conversación del Hearth Otra perspectiva de la historia
Why does the Moon ruin the meteor shower so completely? Can't you just look away from it?
The Moon doesn't have to be in your direct line of sight. Its light scatters across the whole sky, drowning out the faint streaks. It's like trying to see stars from a parking lot with floodlights on. The meteors are dim—most of them are. You need darkness.
So the timing is just bad luck?
Not luck, exactly. The Eta Aquariids peak when they peak because that's when Earth crosses Halley's dust trail. The Moon's phases follow their own cycle. Every few years they align badly. Next year they won't.
Is the comet a consolation prize?
Not really. It's a different kind of thing. The comet is steady, visible for weeks, and you can watch it change position night to night. The meteors are brief flashes. Some people prefer one, some the other.
What about the Venus and Jupiter thing—is that rare?
Planetary conjunctions happen regularly, but this one is worth watching because Venus is so bright. When they're closest, in early June, you'll see the difference in brightness very clearly. It's a good reminder that brightness isn't the same as importance.
And the blue moon at the end of May—is that actually significant?
It's uncommon enough to be worth noting. Two full moons in one month happens maybe once every two and a half years. But it's more of a calendar curiosity than an astronomical event. The Moon itself doesn't change. We just notice it because of how we count months.