adplus-dvertising
Connect with us

Science

Look up Tuesday night! Mars hasn't been this bright in October in over 30 years – The Weather Network

Published

 on


Mars has been growing brighter in the night sky throughout the year so far. On Tuesday night, the planet will be at the brightest we’ve seen it in October in 32 years.

According to NASA, on October 6, 2020, Mars will be 62.1 million kilometres away from Earth. That’s the closest it’s come to us since July and August of 2018, when it reached a distance of 57.6 million km on July 31.

Mars was just 57.6 million km from Earth on July 31, 2018, the closest since 2003. By August 21, 2018, it was farther away than it is now, in October 2020. Credit: NASA/Scott Sutherland

According to NASA, Mars came even closer to Earth in 2003 – 55.7 million km on August 27 – which was the closest the two planets had been in around 60,000 years. Still, by October 2003, the planets had drawn farther away from one another than they are now.

The last time Mars was this bright in our October sky was all the way back in 1988!

How will your skies be for the event, Tuesday night? Watch the video below, which presents the forecast cloud conditions across the country.

WHAT’S GOING ON?

As Earth orbits around the Sun, it follows a slightly elliptical orbit that brings us closest to the Sun (perihelion) in January and farthest (aphelion) in July. On the other hand, Mars traces a wider ellipse, which is nearly oppositely oriented to Earth’s. Its perihelion is close to Earth’s aphelion, and vice versa.

Roughly every two years and two months, Mars and Earth experience an alignment known as Opposition. The two planets line up so that Mars is on the exact opposite side of Earth from the Sun. This year, it occurs on October 13.

Mars-CloseApproach+OppositionMars closest approach vs Mars conjunction of 2020. Credit: NASA/Scott Sutherland

Right around Mars Opposition, the two planets come close to one another. If this happened every 2 years, precisely, it would occur on the same day. Due to the roughly 2 months ‘extra’ tacked on, this can happen at any time of the year. In fact, there’s a specific cycle where the planets draw closer and closer for subsequent Oppositions, then pull farther and farther away, then draw closer again, and so on.

The closest of these events is always when Mars Opposition occurs in late August – with Earth nearly at its farthest from the Sun, and Mars at its closest to the Sun.

BEWARE THE MARS HOAX

Mars hoax-cropAn infamous internet hoax tries to claim that Mars and the Moon will look the same size in the sky. Credit: NASA

While watching Mars right now is great, due to the planet’s brightness in our night sky, watch out for a persistent hoax that will try to blow this fact WAY out of proportion.

Every year, a message makes the rounds over social media, with a wild and utterly false claim that the planet Mars will look as big as the Moon in our sky.

Typically, this message targets August 27, but the hoaxers always revive their story by just changing the date.

The plain and straightforward truth is, the planet Mars has never come even close to appearing as big as the Moon in Earth’s skies, and it never will.

The hoax meme’s problem is that it leaves out an essential detail: the only way the Moon and Mars will ever look to be the same size is if you look at the Moon with the naked eye, and Mars through a telescope.

This detail was included in an original 2003 notice to the public, which told of Mars’s closest approach in some 60,000 years, which won’t be repeated until 2287. The hoaxers subsequently left that out important detail when they repeated it in the years after.

How can we be sure it won’t happen?

Firstly, the closest Earth and Mars ever come to each other is 54.6 million kilometres. That’s roughly 142 times farther away than the Moon. So, if Mars was to appear as big as the Moon, from that distance, the planet would need to be 142 times larger than it is, or over three and a half times bigger than Jupiter!

And secondly, With a 6,779 km diameter, Mars is just under twice as big as the Moon (diameter 3,474 km). So, if Mars stayed the same size to look as big as the Moon, it would have to reach a distance of just over twice as far away as the Moon, or around 750,000 km away from Earth. Mars getting that close to Earth is just as impossible as the planet suddenly inflating to 3.5x the Jupiter size!

Some of the newest additions to this hoax try to add a measure of ‘doomsday’ to the meme. Claims of “panic in the scientific community,” due to a previous closest encounter – back in the year 57,617 B.C. – supposedly caused “changes in the earth’s crust and climatic disasters.” But that is all nonsense. Mars cannot have that kind of effect on Earth from over 50 million km away.

The best things to do for this event are to ignore any strange memes or doomsday claims, and as Mars Opposition approaches, get out and take in the Red Planet at its brightest. If you have access to a telescope or binoculars to get a closer look, all the better!

Sources: NASA | With files from The Weather Network.

Thumbnail courtesy: Getty Images

Let’s block ads! (Why?)

728x90x4

Source link

Continue Reading

News

Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

Published

 on

 

More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

___

Follow AP’s climate coverage at https://apnews.com/hub/climate

___

Follow Seth Borenstein on Twitter at @borenbears

___

Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

Source link

Continue Reading

Science

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

Published

 on

 

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.

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

Trending