Science
Orcas that hunt sperm whales may be new population, study suggests – Global News
Researchers from the University of British Columbia said they’ve identified a potentially new population of open-ocean orcas, which hunt the biggest predators on the planet.
In a study published Friday, researchers said a group of 49 orcas has been observed hunting sperm whales off the coast of California and Oregon.
![Click to play video: 'Great White Shark killed by lone Orca whale in first-ever instance caught-on-camera'](https://i1.wp.com/media.globalnews.ca/videostatic/news/xgq8e9mot8-vzj3ajxesq/WhaleThumberSite.jpg?w=1040&quality=70&strip=all)
Lead author Josh McInnes said the orcas were seen hunting a herd of nine adult sperm whales, “eventually making off with one.”
It’s the first time killer whales have been reported attacking sperm whales on the West Coast, he said.
“Other encounters include an attack on a Pygmy sperm whale, predation on a northern elephant seal and Risso’s dolphin, and what appeared to be a post-meal lull after scavenging a leatherback turtle,” said McInnes, who is a masters student in the UBC Institute for the Oceans and Fisheries.
Researchers said the orcas that were observed in nine encounters from 1997 to 2021 could either belong to a subpopulation of transient killer whales or a unique oceanic population.
The study said the encounter that was witnessed with the sperm whales occurred in 1997 about 130 kilometres off the California coast. Many of the sperm whales in the pod were left with “extensive injuries,” while one was killed, the study said.
“Approximately 12 killer whales were initially involved in the hunt, but this number increased to an estimated 35 killer whales spread out over 3 km. Small concentrated groups of four to five killer whales randomly targeted and attacked individual sperm whales in the rosette,” the study said, describing how the whales gathered in a circle with their heads together and their tails pointing outward.
![Click to play video: 'Orca calf spotted with northern resident pod near Bowen Island'](https://i0.wp.com/media.globalnews.ca/videostatic/news/12711cj9gy-z5oudkg5gf/STILL_ORCA_BABY.jpg?w=1040&quality=70&strip=all)
“Fresh blood and an oil slick of animal fat could be seen at the surface following each attack,” the study continued.
It said one of the whales was dragged away from the rosette with several orcas seen feeding on it.
In another encounter that took place in 2001 about 350 kilometres off the California coast, seven killer whales from the same group were observed scavenging from a leatherback turtle.
McInnes said scientists collected a lot of photographs and data through these encounters, but they couldn’t match or recognize any of the orcas to other known killer whales in the northeastern Pacific.
He notes there are three different types of killer whales that live along the coast of California and Oregon: residents, transients, and offshores.
The study said the individuals they encountered shared physical similarities with both transient and offshore ecotypes, but were not “a perfect fit” with either.
The report said researchers were able to identify the orcas as possibly a new group partially because of bite scars on their bodies from the cookiecutter shark, a species of parasitic sharks that lives in the deep ocean.
“The presence of cookiecutter shark wounds provides indirect evidence that these unknown killer whales had spent time in warmer oceanic waters,” said the study.
![Click to play video: 'Record year for Bigg’s killer whale sightings off B.C. coast in 2023'](https://i2.wp.com/media.globalnews.ca/videostatic/news/83ms0qtwxw-8pmabfrzga/orcas.jpg?w=1040&quality=70&strip=all)
McInnes said almost all of the orcas had the scars, while they haven’t seen them on other killer whales.
“But the big question is, where do these killer whales kind of fit in? We don’t know … but what we do know is that they represent a population that seems to spend more time in the open ocean,” McInnes said in an interview.
Co-author Andrew Trites from the UBC Institute for the Oceans and Fisheries said it’s “pretty unique” to find a new population of killer whales given the time needed to gather photos and recognize the animals as different than known populations.
Researchers said they also observed physical differences in the killer whales such as patches on their fins and saddle.
They said they hope to document more sightings and data from the new population in order to investigate exactly how different these orcas are from other documented populations.
McInnes said the discovery is the first part of a fun puzzle that they are working on.
“We’re just kind of at the tip of the iceberg of what these whales are doing. I mean, are they all one population? Are they multiple? We don’t know. So, I feel like this is kind of the big start of the next steps in our research, and to maybe get more sightings and more information,” said McInnes.
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© 2024 The Canadian Press
Science
Asteroid Apophis will visit Earth in 2029, and this European satellite will be along for the ride
![Asteroid Apophis](https://canadanewsmedia.ca/wp-content/uploads/2024/07/UYbQoEvD846VZKrRhJbczh-320-80.jpeg)
The European Space Agency is fast-tracking a new mission called Ramses, which will fly to near-Earth asteroid 99942 Apophis and join the space rock in 2029 when it comes very close to our planet — closer even than the region where geosynchronous satellites sit.
Ramses is short for Rapid Apophis Mission for Space Safety and, as its name suggests, is the next phase in humanity’s efforts to learn more about near-Earth asteroids (NEOs) and how we might deflect them should one ever be discovered on a collision course with planet Earth.
In order to launch in time to rendezvous with Apophis in February 2029, scientists at the European Space Agency have been given permission to start planning Ramses even before the multinational space agency officially adopts the mission. The sanctioning and appropriation of funding for the Ramses mission will hopefully take place at ESA’s Ministerial Council meeting (involving representatives from each of ESA’s member states) in November of 2025. To arrive at Apophis in February 2029, launch would have to take place in April 2028, the agency says.
This is a big deal because large asteroids don’t come this close to Earth very often. It is thus scientifically precious that, on April 13, 2029, Apophis will pass within 19,794 miles (31,860 kilometers) of Earth. For comparison, geosynchronous orbit is 22,236 miles (35,786 km) above Earth’s surface. Such close fly-bys by asteroids hundreds of meters across (Apophis is about 1,230 feet, or 375 meters, across) only occur on average once every 5,000 to 10,000 years. Miss this one, and we’ve got a long time to wait for the next.
When Apophis was discovered in 2004, it was for a short time the most dangerous asteroid known, being classified as having the potential to impact with Earth possibly in 2029, 2036, or 2068. Should an asteroid of its size strike Earth, it could gouge out a crater several kilometers across and devastate a country with shock waves, flash heating and earth tremors. If it crashed down in the ocean, it could send a towering tsunami to devastate coastlines in multiple countries.
Over time, as our knowledge of Apophis’ orbit became more refined, however, the risk of impact greatly went down. Radar observations of the asteroid in March of 2021 reduced the uncertainty in Apophis’ orbit from hundreds of kilometers to just a few kilometers, finally removing any lingering worries about an impact — at least for the next 100 years. (Beyond 100 years, asteroid orbits can become too unpredictable to plot with any accuracy, but there’s currently no suggestion that an impact will occur after 100 years.) So, Earth is expected to be perfectly safe in 2029 when Apophis comes through. Still, scientists want to see how Apophis responds by coming so close to Earth and entering our planet’s gravitational field.
“There is still so much we have yet to learn about asteroids but, until now, we have had to travel deep into the solar system to study them and perform experiments ourselves to interact with their surface,” said Patrick Michel, who is the Director of Research at CNRS at Observatoire de la Côte d’Azur in Nice, France, in a statement. “Nature is bringing one to us and conducting the experiment itself. All we need to do is watch as Apophis is stretched and squeezed by strong tidal forces that may trigger landslides and other disturbances and reveal new material from beneath the surface.”
By arriving at Apophis before the asteroid’s close encounter with Earth, and sticking with it throughout the flyby and beyond, Ramses will be in prime position to conduct before-and-after surveys to see how Apophis reacts to Earth. By looking for disturbances Earth’s gravitational tidal forces trigger on the asteroid’s surface, Ramses will be able to learn about Apophis’ internal structure, density, porosity and composition, all of which are characteristics that we would need to first understand before considering how best to deflect a similar asteroid were one ever found to be on a collision course with our world.
Besides assisting in protecting Earth, learning about Apophis will give scientists further insights into how similar asteroids formed in the early solar system, and, in the process, how planets (including Earth) formed out of the same material.
One way we already know Earth will affect Apophis is by changing its orbit. Currently, Apophis is categorized as an Aten-type asteroid, which is what we call the class of near-Earth objects that have a shorter orbit around the sun than Earth does. Apophis currently gets as far as 0.92 astronomical units (137.6 million km, or 85.5 million miles) from the sun. However, our planet will give Apophis a gravitational nudge that will enlarge its orbit to 1.1 astronomical units (164.6 million km, or 102 million miles), such that its orbital period becomes longer than Earth’s.
It will then be classed as an Apollo-type asteroid.
Ramses won’t be alone in tracking Apophis. NASA has repurposed their OSIRIS-REx mission, which returned a sample from another near-Earth asteroid, 101955 Bennu, in 2023. However, the spacecraft, renamed OSIRIS-APEX (Apophis Explorer), won’t arrive at the asteroid until April 23, 2029, ten days after the close encounter with Earth. OSIRIS-APEX will initially perform a flyby of Apophis at a distance of about 2,500 miles (4,000 km) from the object, then return in June that year to settle into orbit around Apophis for an 18-month mission.
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Furthermore, the European Space Agency still plans on launching its Hera spacecraft in October 2024 to follow-up on the DART mission to the double asteroid Didymos and Dimorphos. DART impacted the latter in a test of kinetic impactor capabilities for potentially changing a hazardous asteroid’s orbit around our planet. Hera will survey the binary asteroid system and observe the crater made by DART’s sacrifice to gain a better understanding of Dimorphos’ structure and composition post-impact, so that we can place the results in context.
The more near-Earth asteroids like Dimorphos and Apophis that we study, the greater that context becomes. Perhaps, one day, the understanding that we have gained from these missions will indeed save our planet.
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Science
McMaster Astronomy grad student takes a star turn in Killarney Provincial Park
![Art News Canada](https://canadanewsmedia.ca/wp-content/uploads/2024/07/observatory-1.jpg)
Astronomy PhD candidate Veronika Dornan served as the astronomer in residence at Killarney Provincial Park. She’ll be back again in October when the nights are longer (and bug free). Dornan has delivered dozens of talks and shows at the W.J. McCallion Planetarium and in the community. (Photos by Veronika Dornan)
BY Jay Robb, Faculty of Science
July 16, 2024
Veronika Dornan followed up the April 8 total solar eclipse with another awe-inspiring celestial moment.
This time, the astronomy PhD candidate wasn’t cheering alongside thousands of people at McMaster — she was alone with a telescope in the heart of Killarney Provincial Park just before midnight.
Dornan had the park’s telescope pointed at one of the hundreds of globular star clusters that make up the Milky Way. She was seeing light from thousands of stars that had travelled more than 10,000 years to reach the Earth.
This time there was no cheering: All she could say was a quiet “wow”.
Dornan drove five hours north to spend a week at Killarney Park as the astronomer in residence. part of an outreach program run by the park in collaboration with the Allan I. Carswell Observatory at York University.
Dornan applied because the program combines her two favourite things — astronomy and the great outdoors. While she’s a lifelong camper, hiker and canoeist, it was her first trip to Killarney.
Bruce Waters, who’s taught astronomy to the public since 1981 and co-founded Stars over Killarney, warned Dornan that once she went to the park, she wouldn’t want to go anywhere else.
The park lived up to the hype. Everywhere she looked was like a painting, something “a certain Group of Seven had already thought many times over.”
She spent her days hiking the Granite Ridge, Crack and Chikanishing trails and kayaking on George Lake. At night, she went stargazing with campers — or at least tried to. The weather didn’t cooperate most evenings — instead of looking through the park’s two domed telescopes, Dornan improvised and gave talks in the amphitheatre beneath cloudy skies.
Dornan has delivered dozens of talks over the years in McMaster’s W.J. McCallion Planetarium and out in the community, but “it’s a bit more complicated when you’re talking about the stars while at the same time fighting for your life against swarms of bugs.”
When the campers called it a night and the clouds parted, Dornan spent hours observing the stars. “I seriously messed up my sleep schedule.”
She also gave astrophotography a try during her residency, capturing images of the Ring Nebula and the Great Hercules Cluster.
![](http://dailynews.mcmaster.ca/wp-content/uploads/sites/3/2024/07/astronomy-2.jpg)
“People assume astronomers take their own photos. I needed quite a lot of guidance for how to take the images. It took a while to fiddle with the image properties, but I got my images.”
Dornan’s been invited back for another week-long residency in bug-free October, when longer nights offer more opportunities to explore and photograph the final frontier.
She’s aiming to defend her PhD thesis early next summer, then build a career that continues to combine research and outreach.
“Research leads to new discoveries which gives you exciting things to talk about. And if you’re not connecting with the public then what’s the point of doing research?”
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Science
Where in Vancouver to see the ‘best meteor shower of the year’
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Eyes to the skies, Vancouver, because between now and September 1st, stargazers can witness the ‘best meteor shower of the year’ according to NASA.
Known for its “long wakes of light and colour,” the Perseid Meteor Shower will peak on August 12th, 2024 – so consider this list a great place to start if you’re in search of a prime stargazing spots!
Grab your lawn chairs and blankets, and seek as little light pollution as possible. Here are some ideal stargazing spots to check out in and around Vancouver this summer.
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Wreck Beach
If you’re willing to brave the stairs and the regulars, it doesn’t get much better than Wreck Beach for watching the skies – for both sunsets and stargazing. The west-facing views practically eliminate immediate distractions from the city lights.
Spanish Banks Park
Spanish Banks is the perfect mixture of convenience and quality. Its location offers unobstructed views of the skies above, and it’s far enough away from downtown to mitigate some of the light pollution.
Burnaby Mountain Park
If it’s good enough for a university observatory, it’s good enough for us. Pretty much anywhere on Burnaby Mountain will offer tremendous viewpoints, but the higher you get the better (safely).
Porteau Cove
A short drive from Vancouver gets you incredible views of the Howe Sound from directly on the water. And naturally, its distance from any nearby community makes it a prime spot for stargazing.
Cypress Mountain
In addition to having one of the best viewpoints in Vancouver period, Cypress Mountain (and the road up to it) is also a great place to watch the sky. For a double-whammy, we say that you come around sunset, then hang out while the sky gets dark. Sure, it might take a few hours, but the view is worth it.
So there you have it, stargazers! Get ready to witness a dazzling show this summer.
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