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What, exactly, is so special about the Supermoon? – The Weather Network

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One of the most popular events when it comes to pubic interest in astronomy and stargazing is the ‘Supermoon’. What is this phenomenon and why is it so compelling to us?

We’re just around the corner from another Supermoon, as one will be crossing our sky on the night of Monday, March 9. If it seems like you’ve been hearing about them a lot, these days, it’s not just a figment of your imagination. In fact, in any given year, there are at least six, and as many as eight, ‘super’ Moons.

WHAT IS A SUPERMOON?

A Supermoon is a Full Moon or New Moon that is near or at its closest distance to Earth in its orbit.

It isn’t really an astronomical term. Instead, it was thought up by astrologer Richard Nolle, in 1979.

Nolle defined a ‘super’ Moon as “a new or full moon which occurs with the Moon at or near (within 90% of) its closest approach to Earth in a given orbit (perigee).”

The March 9 ‘super’ Full Moon. Credit: NASA’s Scientific Visualization Studio

With the Moon closer than normal at this time, it translates into a Super Full Moon appearing slightly larger in the night sky. What people tend to notice more, however, is the brightness of a Super Full Moon. A Supermoon can appear up to one third brighter than normal!

WATCH BELOW: SEE EVERY VIEW OF THE MOON FOR 2020 IN LESS THAN 5 MINUTES

ASTRONOMICALLY SPEAKING

To put all of this in astronomical terms, a Supermoon is when the Moon reaches its Full or New phase when it is at a distance from Earth of 361,524 km or closer.

Look it up in a textbook, and the distance between Earth and the Moon is 384,400 kilometres. That is only the Moon’s average distance, however.

As the Moon travels around the Earth, its path traces out an ellipse, rather than a perfect circle. That means on each orbit, the Moon spends roughly half the time closer to Earth and half the time farther away. There is also a point where it reaches its closest distance to Earth on that orbit (perigee) and a point where it reaches its farthest distance (apogee).

Moon-Orbit-2020

Since Earth and the Moon are travelling together around the Sun and there are other planets in the solar system, this movement and the tug of gravity from all of these other objects skews the Moon’s orbit ever so slightly. As a result, the ellipse the Moon traces is never exactly the same, orbit by orbit.

With the exact shape and orientation of the Moon’s elliptical orbit shifting ever so slightly, month by month, the Moon’s perigee and apogee distances change as well, and the timing of these events is never the same.

The Moon’s perigee distance can vary between about 356,400 – 370,400 km, and its apogee distance varies between 404,000–406,700 km. Even these are just averages, though. The absolute closest perigee on record was on January 4, 1912, at a distance of 356,378 km. The absolute farthest apogee on record will be on February 3, 2125, at a distance of 406,718 km.

In 2020, there are four Super Full Moons, with the closest perigee Full Moon on the night of April 7-8, when it reaches a distance of 357,042 km. For comparison, the farthest apogee Full Moon is on October 31 – Halloween – at a distance of 406,163 km. (If you’re keeping track, although the February Full Moon occurs in the early morning of the 9th, a full day and a half before the perigee Moon, the Moon is still 99.6% full when it rises on that night

2020-Supermoons-Minimoons

Not that anyone sees them, except during a solar eclipse, but there are three Super New Moons in 2020, as well – on September 16, October 16 and November 15.

2020-SuperNewMoons

WHY THE FASCINATION?

Since there are three of them, at least, every year, Super Moons are certainly not rare. It is often difficult to actually tell that the Moon looks bigger. So, why are Super Moons so compelling to us?

There are definitely more spectacular things to see in the night sky. Meteor showers, lunar eclipses and planetary alignments are just a few that happen on a fairly regular basis. Seeing the full splendour of a glittering sky of stars, with the Milky Way stretching from horizon to horizon, is absolutely awe-inspiring.

Nothing quite compares to the Moon, however.

Besides the Sun, the Moon is our most common and recognizable sight in the sky, day or night. While a Full Moon is a wonder to see, even the thinnest Crescent Moon is still an amazing sight to behold.

Even when we are standing under the brightest lights of the downtown core of a city, where the urban light pollution washes out all the stars and planets in the night sky, if the Moon is in the sky, it will still be clearly visible.

For this reason, the Moon is a very important part of our lives, especially for those who usually miss out on all the other astronomical events in a year. Quite simply, it is our most common point of connection with the universe beyond our planet.

So, when something about the Moon changes, or when it is exceptionally big and bright, it definitely attracts everyone’s attention.

Sources: NASA | Fourmilab

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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

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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.”

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

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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.

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