What Australian sky watchers can expect as the Perseids return for 2025
Dubbed 'the best meteor shower of the year' by experts, the Perseids are one of the busiest showers with about 50 to 100 meteors seen per hour, according to NASA.
The event produces fast, bright streaks and occasional fireballs, larger bursts of light caused by bigger chunks of space debris burning up in Earth's atmosphere.
The meteors come from debris left behind by comet 109P/Swift-Tuttle, which last passed through the inner solar system in 1992 and is almost twice the size of the asteroid believed to have wiped the dinosaurs from Earth.
As Earth moves through this trail of dust and rock each year, the particles slam into our atmosphere at high speeds, creating the familiar flashes of light in the night sky.
NASA says the Perseids are best viewed in the pre-dawn hours, when the sky is darkest and the shower's radiant point, the constellation Perseus, is higher above the horizon, but they can sometimes be seen from about 10pm.
But there's a catch for Aussie viewers: The best views are in the Northern Hemisphere.
Only those in the far north of Australia may catch a glimpse of the brighter meteors, and even then, the brightness of the moon will reduce visibility significantly.
Those in southern Australia will likely miss out altogether.
The shower runs from July 17 to August 23, with peak activity expected about August 12.
Hashtags
Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
ABC News
an hour ago
- ABC News
Scientists look to Indigenous history to manage flood risk in Hawkesbury-Nepean Valley
Accounts of floods recorded in Aboriginal oral history centuries ago could provide vital clues to how climate change will affect flood risk in the future. Scientists working on a disaster adaptation plan for the Hawkesbury-Nepean Valley in Sydney's north-west are looking into the past to help predict the future. Stephen Yeo, senior flood risk specialist at the NSW Reconstruction Authority, said records at Windsor go back to the early days of European settlement. "On this river system, we have the longest record of floods in Australia from the early 1790s right up to the present," he said. "That's actually pretty short in geological time." The biggest flood recorded since European settlement was in June 1867. But there are early colonial accounts of Aboriginal elders describing an even bigger flood that happened eight years before the arrival of the First Fleet. "During that flood it apparently poured in torrents for seven nights and seven days," Dr Yeo said. He said this event changed what scientists know about the magnitude and frequency of flooding in the river system. "It suggests that the flood in 1780 was perhaps 2 or 3 metres higher than what we currently think is the record flood in 1867. "So that's actually really valuable information from that Aboriginal storytelling." Waterway scientist Daryl Lam is part of a team searching for traces of pre-settlement floods. "History is telling us what has happened before really can happen again, so if we can find evidence of big floods from the past, it gives us some understanding of what we can potentially see in climate change," he said. Samples of sediment have been collected from three locations high above the river bank. These samples will be taken back to a laboratory and analysed to pinpoint exactly when the sediment was deposited. Measurements taken at the site will allow researchers to calculate how high the floodwaters rose. "Here in the Hawkesbury-Nepean, we have gauge records that go beyond a hundred years," Dr Lam said. "If we take into account oral history, we might be able to push it out to 200 years or 500 if we are lucky. "With paleoflood reconstruction, we will be able to work out a longer timescale." Archaeologist Bec Chalker said evidence of Aboriginal occupation can be found in caves all along the river. "We find tools that are hidden up on crevices in the shelters, just like we would put our tools and kitchen utensils on a shelf at home." She said Indigenous knowledge built up over generations was proving to be a valuable resource. "We have a lot to learn, and I think people are more open to learning now." Climate change is adding to the flood risk with every degree of atmospheric warming increasing rainfall in the catchment by 8 per cent. Between 2020 and 2022, the area flooded six times. With 114,000 people now living on the flood plain, the NSW Reconstruction Authority is considering whether building levees and improving evacuation roads will help mitigate the risk. "Climate change is here, we have to factor it into today's decision-making," Dr Yeo said.
ABC News
4 hours ago
- ABC News
Sea turtle clinic on Magnetic Island showcases dedication of wildlife carers
Down a dirt track behind the sandhills of an idyllic Queensland tropical beach is a ramshackle, but special, cluster of buildings. This unassuming place occupies the site of a former sewage pumping plant, and is where a team of dedicated volunteers run the Magnetic Island Network for Turtles (MINT) clinic for sick and injured sea turtles. The clinic isn't usually open to the public, but I'm here to find out exactly what happens when your patient is a sea turtle, and how the volunteers' work helps some of the Great Barrier Reef's threatened species. The day starts at 8am when biologist and volunteer Adriana Labate unlocks the gates. Adriana Labate is part of the MINT turtle clinic's daily care team. ( ABC Science: Anna Salleh ) She leans over the first "hospital bed", a "self-cleaning" aquaculture tank that is a bit over 2 metres wide and made of dark green plastic. "This is Boris," she tells me, her soft voice competing with the hum, swish and gurgle of the water filtering system. The scent of seawater fills the air. Inside the tub is a green sea turtle ( Chelonia mydas ) that was rescued after being spotted struggling with fishing line wrapped around its left flipper. Boris hasn't eaten since arriving some weeks ago. Patient Boris spends a lot of time sitting on a rock. ( ABC Science: Anna Salleh ) It is still too early to tell if Boris is a "he" or a "she" because at about 20 years of age, the turtle is still a youngster. It becomes easier to tell the difference between male and female green sea turtles once they mature at about the age of 30 and males develop longer tails, but for now, volunteers use a mix of pronouns to refer to their juvenile patients. The other current patient is Joni, a slightly younger green sea turtle, that was found stranded on one of the Island's beaches. Joni was underweight, could not swim normally, and had a shell infection that made it softer than normal. Unlike Boris, Joni greets Adriana enthusiastically at the edge of the tank. "She already knows food is coming," Adriana says, scooping some turtle scat out of the water. Life on the reef Both Joni and Boris were born on the Great Barrier Reef before riding the currents in the Pacific — like Nemo — as far away as South America. That's decades spent defying the odds; only 1 in 1,000 sea turtle hatchlings survive to adulthood. While swimming on the surface of the high seas, the turtles would have eaten whatever they came across such as squid, jellyfish, and algae. Now they've come back to the Reef to mature and breed and would normally switch to feeding mainly on seagrass on the sea floor. Seagrass is a protected marine plant, and it is illegal to harvest it from the wild, so the patients are fed greens like bok choy or cos lettuce instead. But high-protein seafood is the quickest way to get them to put on much-needed weight. In the volunteer headquarters, Adriana carefully weighs out a portion of chopped squid to feed to Joni. Adriana walks past volunteer HQ, which houses a kitchen-cum-office. ( ABC Science: Anna Salleh ) Adriana heads to the kitchen to get Joni's breakfast. The walls are adorned with colourful turtle-themed mosaics. (ABC Science: Anna Salleh) It's important to know how much the patients are eating as part of getting them well enough to be released. ( ABC Science: Anna Salleh ) It's important to know how much the patients are eating as part of getting them well enough to be released. (ABC Science: Anna Salleh) Joni loves her squid but is a fussy eater. ( ABC Science: Anna Salleh ) High-protein squid will help Joni gain weight before being released back into the wild. (ABC Science: Anna Salleh) Volunteers keep detailed records of their patients. ( ABC Science: Anna Salleh ) Volunteers keep detailed records of what happens on their shifts. (ABC Science: Anna Salleh) Joni is a little fussy, preferring squid over prawns, and especially likes being tantalised by squid tentacles, Adriana says. "You wave them around and pretend that it's an animal … They think that's the creature swimming." Adriana notes that Joni is eating well and has regular bowel movements, which is a good sign there are no gut blockages. Sadly, the records show Boris is losing weight. Turtles can 'give up on life' Turtles can need rescuing for lots of reasons. Some, like Boris, get tangled up in discarded fishing gear, and some are slashed by passing boat propellers. Others battle diseases due to poor water quality, have their food sources destroyed or are choked by plastic. Affected turtles can't swim or dive for food properly. And no food means no energy. It's a vicious cycle. "They get to a point where they're so weak they just wash up on the beach and give up on life," says Paul Groves, co-founder of MINT. Paul's "day job" is as a marine scientist with the Great Barrier Reef Marine Park Authority. But his main job in the hospital is to look after infrastructure, which includes keeping the seawater in the tanks circulating, clean and at the right temperature — to avoid "turtle soup" in the north Queensland summer. Paul Groves smiling at the camera. ( ABC Science: Anna Salleh ) Paul Groves helped found the clinic. (ABC Science: Anna Salleh) Paul is always perfecting the filtration system to reduce the amount of seawater he has to pump up from the beach, which he describes as his "least favourite job". ( ABC Science: Anna Salleh ) Paul's responsible for keeping the seawater circulating and filtered. With a background in aquariums, it's a system he's always trying to perfect. (ABC Science: Anna Salleh) This colourful header tank put in with community help holds seawater pumped up from the nearby beach. ( ABC Science: Anna Salleh ) The better job he does at filtration, the less seawater he has to pump up from the beach to this header tank, something he describes as his "least favourite job". (ABC Science: Anna Salleh) Adult green sea turtles can take four to six people to lift, says Paul. To help cope with bigger patients the hospital got a grant to install a crane to lift bigger patients. ( ABC Science: Anna Salleh ) Paul recently got a grant to install a crane to lift adult green sea turtles, which can otherwise take four to six people to lift. (ABC Science: Anna Salleh) Adults sea turtles can weigh hundreds of kilograms. Here Paul shows a small and large harness that can be used to transfer rescued turtles to the hospital. ( ABC Science: Anna Salleh ) These small and large harnesses are used to transfer rescued turtles from the beach to the clinic. (ABC Science: Anna Salleh) Paul helped establish MINT in 2012 to rescue turtles like Boris and Joni and nurse them back to health so they could be released again to the wild. Back then, countless starving and weak sea turtles washed up on the beaches around Townsville after Cyclone Yasi destroyed the seagrass beds they grazed on. The impact of Yasi also spurred Tim Downs, a Magnetic Island local, to volunteer to help the MINT clinic's medical team. Tim Downs is a volunteer at the turtle clinic. ( ABC: Anna Salleh ) Over the years, Tim's seen countless patients admitted to the clinic — and not all survive. He recalls one "badly smashed up" turtle that had been struck by a boat. Another boat strike case left a deep cut on a turtle's head. "She was very badly concussed … we had her for about three days before she died." Then there was the case of an animal that had its neck trapped in a crab pot. Most patients have "floating syndrome", where the gut is unable to digest its contents properly, so gas from decomposing food builds up inside the turtle causing it to float aimlessly. Swallowing something they shouldn't have is one of the main causes of this life-threatening condition. Fishing line cut blood circulation to Boris' left flipper. ( ABC Science: Anna Salleh ) Turtles have downward-facing spines in their gut to help them filter food from sea water that they "vomit" back out through their nostrils. But this means they can't easily cough anything back up again. And unless it gets passed at the other end, something as innocent as an escaped party balloon can cause a potentially fatal blockage. Swallowed fishing line can wrap around a turtle's innards too, Tim explains. And the movement of the gut tightens the line, making it difficult to pass or be removed by surgery. "It's a pretty agonising death for them," he says. All patients that can fit are put in a CT scanner for free at James Cook University. ( Supplied: JCUVets ) All patients that can fit are put in a CT scanner for free at James Cook University. (Supplied: JCUVets) Tim at the door of the hospital's mobile "tiny home" medical centre. ( ABC Science: Anna Salleh ) Tim at the door of the clinic's mobile "tiny home" medical centre. (ABC Science: Anna Salleh) 20250502_090510 The medical centre is a mobile tiny home that can be conveniently moved if MINT's rent-free status with Townsville City Council ends, or there is a mass stranding of turtles. ( ABC Science: Anna Salleh ) It's in here that complex procedures like tube feeding occur. (ABC Science: Anna Salleh) Boris gets medical care Thankfully, a CT scan indicates Boris hasn't swallowed any fishing gear. But the turtle isn't eating. "His prognosis is good, providing he gets off his hunger strike," Tim says. And if Boris doesn't start eating soon, tube feeding might be necessary. Gina Sweeney, an ex-nurse, injects Boris with a drug to stimulate appetite in the hope it helps. Patients can also get injections of vitamins, antibiotics or painkillers as part of their care. Gina then chases the Boris around the tank to catch and manoeuvre the 13kg turtle out of the tank. That may seem hefty but adult male turtles can weigh up to 150kg. She gently places Boris on the injecting table carefully avoiding contact with the sore flipper that was damaged by fishing line. Gina injects Boris with an appetite stimulant. ( ABC Science: Anna Salleh ) Gina first came across a turtle in the wild while diving on the Great Barrier Reef. "There's something so majestic and I just love them — prehistoric, gentle, graceful … I'm fascinated," she says. "It's a privilege to be able to look after them." Gina feels connected to green sea turtles like Boris. ( ABC Science: Anna Salleh ) Joni's day spa When it's Joni's time for some medical care, first on the agenda is a shell clean. In the wild, "cleaner fish" would keep a turtle's shell in good nick, but in the clinic, patients need a weekly scrub. Out come a selection of dish brushes used to scrub most of the shell, and toothbrushes for the sensitive infected parts. Luckily for Joni, this whole process doubles as a delicious back scrub. Turtles apparently like their butt being scrubbed. ( ABC Science: Anna Salleh ) Turtles have nerve endings in their shell and they particularly enjoy being scrubbed near their rear end, in the same way a dog does, says Lily Donnelly, a PhD student in conservation genetics at James Cook University. "They do enjoy a scratch. They get a bit invigorated by it," she says. After the scrub, Lily cleans out the tiny sores on Joni's shell and puts ointment on them. Then she flips Joni over to attend to the sores on the turtle's underside. Lily is also involved in the medical team. ( ABC Science: Anna Salleh ) Lily, who volunteers in the medical team, is also studying the impact of extreme weather on turtles. (ABC Science: Anna Salleh) Ointment is dabbed into sores on Joni's underside. ( ABC Science: Anna Salleh ) Ointment is dabbed into sores on Joni's underside. (ABC Science: Anna Salleh) Joni's day spa kit including paw-paw ointment and toothbrush to apply it. ( ABC Science: Anna Salleh ) Joni's day spa kit complete with paw paw ointment. (ABC Science: Anna Salleh) A weigh-in is the final stage before Joni is returned to her tank. ( ABC Science: Anna Salleh ) Joni is putting on weight, but is still quite thin. (ABC Science: Anna Salleh) A volunteer gently cradles Joni's head and at times covers the turtle's eyes with a towel to keep it calm. The final part of Joni's "whole body pamper" is a massage with paw paw ointment. Extreme weather takes a toll Lily's been volunteering for the clinic since 2022, and MINT recently got a grant for her to research ways to improve flatback sea turtle ( Natator depressus ) reproduction success on Magnetic Island. Most patients that come to the clinic are green sea turtles, which spend more time close to shore than other species. Hawksbill sea turtles( Eretmochelys imbricata ) are sometimes rescued too. But flatbacks are the main species that nests on the Island's beaches. And extreme temperatures have seen some flatback turtle eggs boiled in their shells, Lily says. "The sand is too hot, and their eggs and turtles are getting cooked before they hatch." Back in the volunteer headquarters, Lily retrieves plastic containers with some of her research samples from a freezer. Her gloved hands cradle a frozen ball — it's a hard-boiled yellow egg yolk with a tiny turtle embryo still clinging to it. This flatback turtle egg was found cooked in the sand. ( ABC Science: Anna Salleh ) Overheating not only affects the number of hatchlings from each nest but when babies do survive, they're more likely to be female — something that can also affect reproduction success for the species. A record deluge too has been a challenge for turtles. This year's monsoon saw around 2.5 metres of rain fall in a just few short months. From one of the other freezer bags, she takes out another victim of extreme weather: a dead hatchling that got "cold shock" after 10 straight days of driving rain. "It got stuck in the sand dunes and it didn't make it." Lily holds a hatchling that didn't survive the record-breaking wet season. ( ABC Science: Anna Salleh ) Volunteers and fundraising Paul has organised a working bee to attract prospective volunteers so there are more people here today than usual. But there's a lot of training required to be a volunteer and people often leave not long after they arrive. This leaves a gap in the feeding roster that has to be rapidly plugged with the remaining volunteers. He encourages people who are prepared to commit for at least six months. While a voluntary workforce is good, the clinic still needs to get grants for infrastructure and electricity, and fundraise for running costs such as food for the patients. They aim to feed a recovering turtle 10 per cent of its body weight in seafood every day. Paul and Tim chat to a potential new recruit. ( ABC Science: Anna Salleh ) Fortunately, there is a volunteer vet on the team and James Cook University provides free CT scans for any patients that can fit in their scanner. Medications and surgery must be paid for separately though, and this is where the Magnetic Island community steps in. "People on the Island collect their cans and bottles and then donate them to us and that [a "cash for cans" container deposit scheme] pays for the food and the medicine and electricity," Paul says. Around the Island, people support fundraising efforts for the clinic. ( ABC Science: Anna Salleh ) As I leave, the place still buzzes with activity. Adriana has shifted from patient care to painting doors and Paul is assessing whether or not he can build a roof over some holding tanks to prevent turtles drowning when it rains heavily. Joni goes home Two months after my first visit to the turtle clinic, a notice pops up in my social media feed. Joni has recovered and will be released back into the wild. After 16 weeks in care Joni has done well and if anything is "a little bit fat," which should give her a head start going back into the ocean, says Dhanushka Jayokody-Perera, a volunteer vet. Dr Dhanushka Jayokody-Perera — known as "Dr Dhash" — volunteers veterinary services to the clinic. ( ABC Science: Anna Salleh ) "Joni's recovered much quicker than some of the others we've had," Dr Jayokody-Perera says. On a bright, sunny Saturday, I join a group of islanders who form a U-shape on the beach as Joni is lifted down to the water's edge. Joni is carried through a crowd on the last leg of the journey from the clinic to back to the reef. ( ABC Science: Anna Salleh ) Joni is carried through a crowd on the last leg of the journey from the clinic back to the reef. (ABC Science: Anna Salleh) After 16 weeks, Joni is back in the ocean. ( ABC Science: Anna Salleh ) After 16 weeks, Joni is back in the ocean. (ABC Science: Anna Salleh) This is the moment the volunteers have been waiting for. Joni takes off like a rocket through the water as the crowd claps and cheers. Lily reflects on the highs and lows of turtle care. "It's bittersweet, but it's always great to see them go back to their ocean home," she says. But not all turtles that come into the clinic make it back home. An X-ray revealed Boris had a broken flipper. The team gave him painkillers and a moon boot, and he picked up for a while, but then complications from a lack of blood set in and the turtle needed surgery to remove part of the flipper. Sadly, despite all the team's efforts, Boris didn't recover and unexpectedly died two days after Joni was released. Tim reflects on the time he spent with Boris. "They win you over because you care for them for so long," he says. "[Boris's death] is sad, but it's something you have to accept when you take on the role of a rehabilitator. "We think about the ones we can save, rather than the ones we lose."
ABC News
2 days ago
- ABC News
Scientists release seven-point plan to tackle SA's 'catastrophic' toxic algal bloom
An independent group of marine scientists from around Australia has released a seven-point plan to tackle what it describes as South Australia's "catastrophic" toxic algal bloom. The Biodiversity Council, an independent group founded by 11 Australian universities, has outlined seven key actions that federal and state governments should consider to "urgently respond" to the bloom, known as Karenia mikimotoi. It includes spending at least $10 million to immediately kick-start scientific research to assess which species are affected by the bloom, how much, and monitor recovery. It has also warned that the algal bloom is not just a South Australian issue, and the impact will be far-reaching amid increasing marine heatwaves across the country. Biodiversity Council member, professor Gretta Pecl from the University of Tasmania's Institute for Marine and Antarctic Studies, said the washed up marine life on beaches is just a sliver of the animals killed, with most animal bodies "rotting on the sea floor". "The exact death toll would be impossible to determine as monitoring of marine environments and species is fairly lacking in Australia, but we cannot wait to act," she said. The harmful algal bloom has been ravaging marine life throughout the state since March, disrupting fishing, aquaculture and tourism industries and threatening fragile coastal ecosystems. The state and federal governments this week pledged $28 million to assist in dealing with the bloom, but Federal Environment Minister Murray Watt stopped short of declaring it a national disaster. Professor Pecl said the funding was a "fantastic start" but much more would be needed. She said the scale of wildlife deaths is likely to be equivalent to the Black Summer Bushfires and the impact will be felt across borders. "Although the footprint of the harmful algal bloom at the moment looks like it's limited to South Australia, many of those species there have really important connections to the west coast and the east coast. "The damage that's been incurred … will massively exceed the boundaries of the bloom itself." The report said more than 450 marine species had been observed washed up across South Australian coastlines, with over 14,000 observations by citizen scientists. It also said while natural oceanographic conditions played a role, the crisis has also been driven by human activities. Professor Pecl said harmful algal blooms had also been highlighted many times before amid increased ocean warming. "The scale of each harmful algal bloom event seems to be increasing," she said. "If there isn't something done to mitigate, to reduce climate emissions, warming will continue and these kind of events will be more and more likely." The proposed actions for Australian and state governments to respond to the bloom, and Australia's broader marine heatwave are: The report was produced by a team of scientists from five Australian universities including, The University of Adelaide, The University of Tasmania, Monash University, The University of Melbourne, and The University of Western Australia. Biodiversity Council member, professor Nicki Mitchell from the University of Western Australia's Oceans Institute said Australia must prepare for a more "dangerous climate future". "Due to man-made climate change, the frequency and intensity of natural disasters that harm biodiversity, industries and communities will only increase," she said. "This includes not just harmful algal blooms, but also marine and terrestrial heatwaves, floods and bushfires." Professor Ivan Nagelkerken from the University of Adelaide Environment Institute said Adelaide's coast would always be vulnerable to algal blooms. "South Australia's gulfs are particularly vulnerable to algal blooms due to coastal nutrient inputs, warming shallow waters and poor water exchange," he said. "We must collectively do all we can to reduce coastal nutrient inputs and greenhouse gas emissions. "Locally, we can also build the resilience of ecosystems to recover by protecting and restoring marine ecosystems, like kelp forests and seagrass beds, to support bigger fish populations as well as absorb carbon and improve water quality." Mr Watt earlier this week said the federal funding pledged would likely go to cleaning up and research. "There will need to be some further discussions between ourselves and the South Australian government about exactly the details of how that funding is used," he said. "But it's intended to deal with a number of short-term requirements, and some of the longer-term needs that South Australia is going to face as it recovers from this event." He said it would also assist affected businesses, boosting "community awareness" and investing in scientific research. "This is an unprecedented event and one of the difficulties has been understanding exactly what its impacts are and what sort of response is required," he said.
