Everything You Need to Know About 2021's Eta Aquarids Meteor Shower
This spectacular starry event only happens once a year — here's how you can get a glimpse.
Sometimes, we're all looking onwards, upwards and forwards because we're thinking about the future. In a 16-month period that's seen normality as everyone knows it change and evolve rapidly, that's hardly surprising. But don't forget to look up literally, too — especially when must-see sights keep gracing the night sky.
When it comes to vibrant astronomical visions, the past few weeks have well and truly delivered. First, the Lyrids meteor shower lit up the night. Then, the 'pink' supermoon did its lunar thing. Every autumn, the Eta Aquarids meteor shower also sets the sky ablaze, and it's that time now.
This year, the shower will be at its most spectacular early on Friday, May 7 — very early, in fact. If you're eager to catch a glimpse, even from just your backyard or balcony, here's how.
WHAT IS IT
The Eta Aquarids might not be as famous as Halley's Comet, but the shower is actually a distant relation — because the bits and pieces you see flying around were on Halley's path a really, really long time ago. And, rather than only being visible every 76 years (the next Halley's Comet sighting is in 2061), the Eta Aquarids come around every year, usually between April 19–May 28 every year. The shower's name comes from the star from which they appear to come Eta Aquarii, which is part of the Aquarius constellation. So, that's what you'll be looking for in the sky.
Luckily, being in the southern hemisphere, we get some of the best views in the world. On average, you can see up to 20–40 meteors per hour.
WHEN TO SEE IT
The shower will reach a peak in the early morning of Friday, May 7, but will still be able to be seen for a few days on either side. The best time to catch an eyeful is just before dawn after the moon has set, so around 4am.
This year, at that time, you'll be in the running to see as many as 50 meteors every 60 minutes. Each will be moving at about 225,000 kilometres per hour, shining extraordinarily brightly and leaving a long wake. The shower's cause is, essentially, the Earth getting in the comet's way, causing stardust to fry up in the atmosphere.
HOW TO SEE IT
Usually, when a meteor shower lights up the sky, we'd tell city-dwellers to get as far away from light pollution as possible to get the best view. If you can't venture out of town at the moment, you can still take a gander from your backyard or balcony.
To help locate the shower, we recommend downloading the Sky Map app — it's the easiest way to navigate the night sky (and is a lot of fun to use even on a non-meteor shower night). If you're more into specifics, Time and Date also has a table that shows the direction and altitude of the Eta Aquarids. It has been updating this daily.
The weather might get in the way of your viewing, though. Sydney is set for showers until Friday — fingers crossed that the wet weather takes a break during the early hours. It's also forecast to be partly cloudy in Melbourne until the weekend, mostly sunny in Brisbane, showery and cloudy in Perth, and partly cloudy in Adelaide.
This year, the meteor shower will also have to compete with the moon, which is expected to reduce visibility — so catching a glimpse pre-dawn after the moon sets is your best bet.
