Science
Keep An Eye On The Sky For The Leonid Meteor Shower This Weekend Peak On The 18th
The Leonid meteor shower, expected to deliver brilliant meteors with persistent trains shooting across the night sky, is next for end-of-year celestial spectaculars.
According to EarthSky, the Leonids have been active since early November and are scheduled to peak this weekend at 12:33 a.m. ET Saturday. Skywatchers could witness 10 to 15 meteors each hour in a spectacular display.
Those hoping to see a meteor from this shower are in luck because the moon will be in its waxing crescent phase, which means there will be less light interference than there is with a full moon, according to Dr. Sharon Morsink, a professor of physics at the University of Michigan.
The University of Alberta is located in Edmonton, Alberta. According to the American Meteor Society, the moon will be 23% full on the night of the shower’s peak.
While Saturday is the peak, the same rates of meteors can be seen a few days before and after. According to Morsink, who also administers the university’s astronomical observatory, the optimum time to view the shower would be after midnight in any time zone when the constellation Leo will be highest in the sky.
The Leonid meteor showers
She said that Leo is the radiant of the meteor shower, which is where the event appears to start.
“The most important thing is to avoid light pollution,” Morsink said. “You can still see some meteors if you’re in the city, but you’re not going to see anywhere near the number you get to see if you get out of the city.”
According to NASA, the Leonids are famous for producing meteor storms, which occur when a shower produces at least 1,000 meteors per hour.
According to the American Meteor Society, the Leonids generated 144,000 meteors per hour in 1966, setting the record for the highest number of meteors per hour witnessed in a meteor stream. The shower also produced higher-rate outbursts in 1999 and 2001, but humanity does not anticipate another storm until 2099, when the Earth is expected to collide with a dense cloud of debris from the parent comet, Tempel-Tuttle.
As the comet orbits the sun, it leaves a trail of pebbles and dust behind it, which causes the yearly Leonid meteor shower to occur as Earth passes through the debris on its orbital path.
Although a Leonid storm event is not expected this year, there is always the possibility of seeing a few more meteors than the estimated rate, according to Morsink.
“Getting out and seeing any meteor shower for the first time is always fun,” she said. “It’s just this fascinating connection we have with the entire solar system — here’s this comet far away from us that has been circling the sun for an incredibly long time, probably billions of years.” It allows us to communicate with objects that are quite far away.”
Keep An Eye On The Sky For The Leonid Meteor Shower This Weekend
According to the American Meteor Society, meteors from the Leonids are expected to be blazing in the sky until the shower’s finality on December 2.
If you are eager to see more, here are the remaining meteor showers that peak in 2023:
● Geminids: December 13-14
● Ursids: December 21-22
Full moons
There are two full moons remaining in 2023, according to the Farmers’ Almanac:
● November 27: Beaver moon
● December 26: Cold moon
The Leonid meteors are a prolific meteor shower associated with the comet Tempel-Tuttle. They are visible annually in November when the Earth passes through the debris trail left by the comet. The meteors appear to radiate from the constellation Leo, hence their name.
At their peak, the Leonids can produce a high number of meteors per hour, known as a meteor storm. This celestial event is popular among stargazers and astronomers due to the impressive display of bright, fast-moving meteors.
SOURCE – (CNN)
Science
Australia Asks Residents to Catch Deadly Funnel Web Spider
As summer approaches in Australia, residents are warned to look out for the funnel web spider, one of the country’s deadliest species.
In addition to advising the public to avoid funnel-web spiders during mating season, the Australian Reptile Park in New South Wales has even asked people to capture live funnel-web spiders so they can “milk” their venom.
Native to eastern Australia, the funnel web spider can kill humans in as little as fifteen minutes if they do not receive medical treatment for its poisonous bite.
There have been thirteen fatalities attributable to this species, but none since the development of antivenom in 1981. The Australian Reptile Park is appealing to the public for assistance capturing and donating spiders, as the serum relies on milking live spiders.
Hunting for the funnel net spider in residential areas is common practice after a particularly wet and warm season. Look for spiders in cool, dark places like pools, garden residue, heaps of dirty clothing, and outside shoes.
Australian Reptile Park spider keeper Emma Teni recently blogged about how they rely on spider donations more than ever, especially now that breeding season has arrived and the temperature is perfect.
“Male funnel-web spiders have short lifespans, and with approximately 150 spiders required to make just one vial of antivenom, we need the public’s help to ensure we have enough venom to meet demand.”
“If you spot an egg sac while collecting a spider, it’s important to safely collect that as well,” said Teni. “It can provide a robust supply of healthy young spiders to aid in our antivenom production.”
The spiders won’t be able to climb plastic or glass, but Teni suggests capturing funnel webs in a wide-mouthed jar with a cover. Then, you can lead the spiders into the container using a long spoon or something similar.
After that, fill the jar with moist soil, screw on the top, and bring it to the designated drop-off spot.
“We depend on the public for spider donations, and we want to make sure everyone stays safe during the collection process, especially with conditions being so favourable this year,” said Teni.
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Science
A Spacecraft Is On Its Way To A Harmless Asteroid Slammed By NASA In A Previous Save-The-Earth Test
CAPE CANAVERAL, Florida – A spacecraft launched Monday to probe the site of a cosmic accident.
The European Space Agency’s Hera spacecraft launched on a two-year trip to the little, harmless asteroid slammed by NASA two years ago as a practice run for the day when a murderous space rock threatens Earth. It’s the second phase of a planetary defense experiment that could one day save the globe.
SpaceX’s Falcon rocket vanished with Hera into the late morning clouds. An hour later, cheering erupted in the control center in Germany as the spacecraft split from the rocket’s upper stage and returned home. “It’s an amazing day,” the space agency’s director general, Josef Aschbacher, said later.
The 2022 crash of NASA’s Dart spacecraft reduced Dimorphos’ orbit around its larger companion, indicating that if a harmful rock was heading our way, it might be pushed off course with adequate warning.
A Spacecraft Is On Its Way To A Harmless Asteroid Slammed By NASA In A Previous Save-The-Earth Test
Scientists are eager to analyze the aftermath of the impact up close to determine how effective Dart was and what improvements may be required to protect Earth in the future.
“The more detail we can glean the better as it may be important for planning a future deflection mission should one be needed,” University of Maryland astronomer Derek Richardson stated before launch.
Researchers want to know if Dart (short for Double Asteroid Redirection Test) created a crater or changed the 500-foot (150-meter) asteroid more dramatically. It seemed to be a flying saucer before Dart’s blow and may now resemble a kidney bean, according to Richardson, who participated in the Dart mission and is assisting Hera.
Dart’s wallop sent rubble and boulders hurtling off Dimorphos, adding to the impact’s momentum. For months, the debris track extended thousands of miles (almost 10,000 kilometers) into space.
According to flight director Ignacio Tanco, some rocks and debris may still be hovering about the asteroid, posing a threat to Hera.
A Spacecraft Is On Its Way To A Harmless Asteroid Slammed By NASA In A Previous Save-The-Earth Test
“We don’t really know very well the environment in which we are going to operate,” Tanco informed me. “But that’s the whole point of the mission is to go there and find out.”
European authorities refer to the $400 million (363 million euros) effort as a “crash scene investigation.”
“Hera is going back to the crime scene and getting all the scientific and technical information,” said project manager Ian Carnelli.
Carrying a dozen science instruments, the compact car-sized Hera must swing past Mars in 2025 for a gravitational boost before landing at Dimorphos by the end of 2026. It’s a moonlet of Didymos, the Greek word for twin, a five-times larger asteroid that spins quickly. At that point, the asteroids will be 120 million miles (195 million kilometers) from Earth.
Hera will attempt to enter orbit around the rocky duo, progressively reducing flyby distances from 18 miles (30 kilometers) to a half-mile (1 kilometer). The spacecraft will examine the moonlet for at least six months to determine its mass, shape, composition, and orbit around Didymos.
Before the crash, Dimorphos circled its larger partner from three-quarters of a mile (1,189 meters) away. Scientists believe the orbit has become tighter and more oval-shaped, and that the moonlet may be tumbling.
Two shoebox-sized Cubesats will launch from Hera for even closer drone-like examinations, with one employing radar to peek beneath the moonlet’s boulder-strewn surface. Scientists believe Dimorphos was produced from particles shed by Didymos. The radar measurements should assist in determining whether Didymos is the small moon’s parent.
A Spacecraft Is On Its Way To A Harmless Asteroid Slammed By NASA In A Previous Save-The-Earth Test
After their survey, the CubeSats will attempt to land on the moonlet. If the moonlet tumbles, the situation will become more complicated. Hera may potentially conclude its mission with a perilous touchdown but on the bigger Didymos.
Asteroids, which are remnants of the solar system’s origin 4.6 billion years ago, circle the sun principally between Mars and Jupiter in what is known as the main asteroid belt, where millions of them live. When they fall from the belt and land in our area, they become near-Earth objects.
NASA now has around 36,000 near-Earth objects, the majority of which are asteroids, although there are also some comets. More than 2,400 of them are deemed potentially dangerous to the Earth.
SOURCE | AP
Science
A Rare Comet Brightens The Night Skies In October
NEW YORK — Prepare to spot a rare and dazzling comet.
The space rock is hurling toward Earth from the far reaches of the solar system and will make its closest approach on Saturday. It should be visible through the end of October, assuming clear skies.
A Rare Comet Brightens The Night Skies In October
Comet Tsuchinshan-Atlas should be visible to the naked eye, but binoculars and telescopes will provide a clearer view.
“It’ll be this fuzzy circle with a long tail stretching away from it,” explained Sally Brummel, planetarium manager at the Bell Museum in Minnesota.
What is a comet?
They are frozen remains from billions of years ago when the solar system was formed. They heat up as they swing toward the sun, revealing their distinctive streaming tails.
In 2023, a green one that had last visited Earth 50,000 years ago flew past again. Other significant flybys were Neowise in 2020 and Hale-Bopp and Hyakutake in the mid to late 1990s.
Where did Tsuchinshan-Atlas come from?
Also known as C/2023 A3, was found last year and named after the observatories in China and South Africa that spotted it.
It originated in the Oort Cloud, which extends far beyond Pluto. After making its closest approach to Earth at 44 million miles (71 million kilometers), it will not return for another 80,000 years, provided it survives the journey.
A Rare Comet Brightens The Night Skies In October
Every year, several comets are detected, but many of them burn up near the sun or are too far away to be observed without special equipment, according to Larry Denneau, a key researcher with the Atlas telescope that helped discover it.
How to View
Those seeking to see Tsuchinshan-Atlas should go outside about an hour after sunset on a clear night and look to the west.
The comet should be visible from both the Northern and Southern Hemispheres.
SOURCE | AP
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