Infrastructure vulnerable to sun's blasts | Life | pentictonherald.ca - pentictonherald.ca | Canada News Media
Connect with us

Science

Infrastructure vulnerable to sun's blasts | Life | pentictonherald.ca – pentictonherald.ca

Published

 on


These days most of us are familiar with the term “space weather.” Actually, “solar weather” is a more accurate term because what we mean by space weather is what the sun is sending in our direction and what its effects are on our space neighbourhood, the Earth, and our activities. The main things we have to consider are the solar wind, solar flares, and coronal mass ejections.

The solar wind is a continuous and highly variable blast of particles and magnetic fields moving outward from the Sun at speeds ranging from hundreds to thousands of kilometres a second. Most of this is held away from the Earth by our planet’s magnetic field. If left alone that field should be shaped like a doughnut.

The solar wind blowing over and around it has shaped it into a long teardrop. How important our magnetic field is to us is shown by what we see on Mars. That planet’s magnetic field decayed long ago, and since then the solar wind has scoured away most of the planet’s atmosphere.

TNCMS.AdManager.init
(
domain: “www.pentictonherald.ca”,
secureDomain: “pentictonherald.ca”,
virtualregion:
popup: __tnt.ads.popup
,
callback:
expandable: __tnt.ads.expandable,
html: __tnt.ads.html,
image: __tnt.ads.image,
pagecurl: __tnt.ads.curl,
text: __tnt.ads.text,
video: __tnt.ads.video

);

The sun is a nuclear fusion powered ball of hot plasma threaded by magnetic fields. These emerge through the surface and form huge loops, filled with trapped, million-degree plasma. This “magnetoplasma” is rather like a mass of elastic.

It can be stretched, twisted or compressed. The constant motion of the solar surface leads to these loops getting tremendously stressed, and a colossal amount of energy stored in them. In most cases there are processes that can relax the stresses and release the energy slowly. However, on occasion instabilities develop which release that energy catastrophically, resulting in a huge explosion, known as a solar flare.

Huge bursts of high-energy radiation, such as X-rays are produced; electrons are accelerated to almost the speed of light and shot off into space, along with beams of other high-energy particles.

Here on the Earth’s surface, protected by our magnetic field and atmosphere, these hazards pose little threat. However, for those in space or flying over the poles at high altitudes, the radiation and high-energy particles from the sun can pose problems.

Coronal mass ejections, or “solar storms” are loops that have snapped off at the roots and catapulted out into space at thousands of kilometres a second. They are mostly stopped by the Earth’s magnetic field, but they can cause intense magnetic storms, which in turn cause power outages and other issues.

For us here on Earth, over history solar activity has, as far as we know, posed little threat to living things. The main thing was the occasional spectacular and beautiful displays of aurora.

However, over the last few decades, things have started to change. Our increasing dependence on high-tech infrastructure has made us more and more vulnerable to disruptions of our hi-tech lives.

A big question here is how big solar flares can get. Is it possible they could threaten our lives as opposed to our technical infrastructure?

Astronomers recently detected a flare on another star that released millions of times the energy of the biggest solar flare observed so far. This star, designated HD 283572 lies some 400 light years away. It is young star, only around 3 million years old, and is about 40% more massive than the Sun. If the Sun produced such an event, it is not clear that our atmosphere and magnetic field could protect us from the environmental damage it could produce.

Such flares could have devastating effects on life starting up on young planets. It looks as though when we are looking for life on planets orbiting other stars, we will need to consider the behaviour of those stars. Only one of these megaflares has been detected so far so we have no idea how rare they are.

Ken Tapping is an astronomer with the National Research Council’s Dominion Radio Astrophysical Observatory, Penticton.

Adblock test (Why?)



Source link

Continue Reading

Science

The body of a Ugandan Olympic athlete who was set on fire by her partner is received by family

Published

 on

 

NAIROBI, Kenya (AP) — The body of Ugandan Olympic athlete Rebecca Cheptegei — who died after being set on fire by her partner in Kenya — was received Friday by family and anti-femicide crusaders, ahead of her burial a day later.

Cheptegei’s family met with dozens of activists Friday who had marched to the Moi Teaching and Referral Hospital’s morgue in the western city of Eldoret while chanting anti-femicide slogans.

She is the fourth female athlete to have been killed by her partner in Kenya in yet another case of gender-based violence in recent years.

Viola Cheptoo, the founder of Tirop Angels – an organization that was formed in honor of athlete Agnes Tirop, who was stabbed to death in 2021, said stakeholders need to ensure this is the last death of an athlete due to gender-based violence.

“We are here to say that enough is enough, we are tired of burying our sisters due to GBV,” she said.

It was a somber mood at the morgue as athletes and family members viewed Cheptegei’s body which sustained 80% of burns after she was doused with gasoline by her partner Dickson Ndiema. Ndiema sustained 30% burns on his body and later succumbed.

Ndiema and Cheptegei were said to have quarreled over a piece of land that the athlete bought in Kenya, according to a report filed by the local chief.

Cheptegei competed in the women’s marathon at the Paris Olympics less than a month before the attack. She finished in 44th place.

Cheptegei’s father, Joseph, said that the body will make a brief stop at their home in the Endebess area before proceeding to Bukwo in eastern Uganda for a night vigil and burial on Saturday.

“We are in the final part of giving my daughter the last respect,” a visibly distraught Joseph said.

He told reporters last week that Ndiema was stalking and threatening Cheptegei and the family had informed police.

Kenya’s high rates of violence against women have prompted marches by ordinary citizens in towns and cities this year.

Four in 10 women or an estimated 41% of dating or married Kenyan women have experienced physical or sexual violence perpetrated by their current or most recent partner, according to the Kenya Demographic and Health Survey 2022.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

B.C. sets up a panel on bear deaths, will review conservation officer training

Published

 on

 

VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version