Earth is exceeding ‘safe operating space for humanity’, study says

The planet’s climate, biodiversity, land, freshwater, nutrient pollution and “novel” chemicals are all out of place, according to a new scientific paper.

Pic: iStock

Earth is exceeding its “safe operating space for humanity” in six of nine key measurements of its health, and two of the remaining three are heading in the wrong direction, a new study has said.

The planet’s climate, biodiversity, land, freshwater, nutrient pollution and “novel” chemicals (human-made compounds like microplastics and nuclear waste) are all off-kilter, according to a group of international scientists.

Only the acidity of the oceans, the health of the air and the ozone layer are within the boundaries considered safe, and both ocean and air pollution are heading in the wrong direction, the study in the journal Science Advances found.

“We are in very bad shape,” said study co-author Johan Rockstrom, director of the Potsdam Institute for Climate Impact Research in Germany.

“We show in this analysis that the planet is losing resilience and the patient is sick.”

In 2009, Professor Rockstrom and other researchers created nine different broad boundary areas and used scientific measurements to judge Earth’s overall health.

The paper revealed on Wednesday was an update from 2015 and it added a sixth factor to the unsafe category.

Water went from “barely safe” to the “out-of-bounds” category because of worsening river run-off, better measurements and understanding of the problem, Professor Rockstrom said.

These boundaries “determine the fate of the planet”, he said, adding that nine factors have been “scientifically well established” by numerous outside studies.

Source: https://news.sky.com/story/earth-is-exceeding-safe-operating-space-for-humanity-study-says-12960795

Has a Harvard professor found the first-ever alien objects on Earth?

Avi Loeb, a theoretical physicist and professor at Harvard, has claimed that some spherules retrieved from the bottom of the Pacific Ocean in June show ‘extremely high abundances’ of a composition of heavy elements not known to man. However, some in the scientific community remain sceptical

An undated photo provided by EYOS Expeditions shows Dr Avi Loeb, left, searching the sled magnets for particleswith, from left, Charles Hoskinson, Ryan Weed and Jeff Wynn. The New York Times

A controversial Harvard professor has claimed to have found the first-ever alien objects on Earth.

Avi Loeb, a theoretical physicist and professor at Harvard, has claimed to have found particles on the bottom of the Pacific Ocean made of an alloy not seen on Earth.

“This is a historic discovery because it represents the first time that humans put their hand on materials from a large object that arrived on Earth from outside the solar system,” Loeb wrote on Tuesday on Medium.

“The success of the expedition illustrates the value of taking risks in science despite all odds as an opportunity for discovering new knowledge.”

But has Loeb, who was the longest-serving chair of astronomy at Harvard University, actually found discovered objects?

Let’s take a closer look:

What happened?

As per USA Today, a meteor burned up the Earth’s atmosphere in January 2014.

The meteor, which exploded into fragments, went down around 100 kilometers off the coast of Manus Island in Papua New Guinea.

But no one took note of it for the next few years – until Loeb and an undergraduate at Harvard drew attention to it in 2019 and published research on it.

Then, in 2022, US Space Command dropped a bombshell in a letter to NASA – the meteor was likely from another solar system.

As per Moneycontrol, Loeb and his team then determined that IM1 was tougher than all the meteors in NASA’s Center for Near Earth Object Studies (CNEOS) catalogue.

Loeb then declared that he would attempt to retrieve the fragments of the meteor from the ocean floor.

“Intrigued by this conclusion, I established a team that designed a two-week expedition to search for the meteor fragments at a depth of 1.7 kilometers on the ocean floor,” Loeb said.

Loeb and his team secured $1.5 million of funds for the expedition from entrepreneur Charles Hoskinson.

Loeb and his team in June employed EYOS Expeditions and set off in a boat named the Silver Star bound for Papa New Guinea.

The expedition team on the deck of the Silver Star in June. Image courtesy: Avi Loeb/ Medium

As per BBC, Loeb used a device he claimed to have invented called the “interstellar hook” to collect potential samples off the ocean floor.

As per The New York Times, the team dragged this ‘interstellar hook’ across the seafloor for weeks.

They found glimmering beads which were under a millimetre in diameter.

Loeb and his team claimed to have found 700 spherules at the bottom of the Pacific Ocean, as per Jerusalem Post.

Thus far, 57 of them have been analysed.

What is Loeb claiming?

Loeb is claiming that early examination shows that some of the spherules have “extremely high abundances” of a composition of heavy elements never been seen before, as per USA Today.

Researchers claim that the composition of Beryllium, Lanthanum and Uranium – which they have named “BeLaU” – does not match either terrestrial alloys found on the Earth or fallout from nuclear explosions.

Old NASA satellite falling to Earth, risk of danger ‘low’

An old NASA satellite is expected to fall to Earth this week, but experts tracking the spacecraft say chances are low it will pose any danger.

The defunct science satellite known as Rhessi will plummet through the atmosphere Wednesday night, according to NASA and the Defense Department.

NASA said Tuesday that the reentry location is not being disclosed, given lingering uncertainty over when and where it might go down. Most of the 660-pound (300-kilogram) satellite should burn up upon return, but some parts are expected to survive.

The space agency said in a statement the risk of anyone on Earth being harmed by plunging satellite pieces is “low” — about 1-in-2,467.

Rhessi — short for the Reuven Ramaty High Energy Solar Spectroscopic Imager — rocketed into orbit in 2002 to study the sun.

Before being shut down in 2018 because of communication problems, the satellite observed solar flares as well as coronal mass ejections from the sun. It captured images in high-energy X-rays and gamma rays, recording more than 100,000 solar events.

Source: https://apnews.com/article/nasa-satellite-space-falling-orbit-d9041dfa1034c622105d6954d521a5e6

110-foot Asteroid 2023 FT1 hurtling towards Earth, says NASA; travelling at blistering speed

Asteroid 2023 FT1 belongs to the Apollo group of asteroids. (Pixabay)

A huge asteroid is headed towards Earth and could make its closest approach to the planet soon. Although asteroids pass closely to Earth on a daily basis, none of them come close enough to impact the surface. However, their close approaches serve as a reminder of the potential danger that asteroids can pose to our planet. That is why agencies like NASA, ESA and others continue to keep an eye on these Near-Earth Objects which have the potential to cause major destruction on Earth if they ever impacted.

 

33% OFF

Realme Pad X
  • Glowing Grey
  • 4 GB RAM
  • 64 GB Storage

₹19,989₹29,999

Buy now

 

29% OFF

Xiaomi Mi Pad 5
  • Cosmic Gray
  • 6 GB RAM
  • 128 GB Storage

₹26,999₹37,999

Buy now

 

 

Realme Pad
  • Real Gold
  • 3 GB RAM
  • 32 GB Storage

₹21,999

Buy now

 

 

Apple IPad Mini 6
  • Pink
  • 4 GB RAM
  • 64 GB Storage

₹49,900

Buy now

 

Asteroid 2023 FT1 details

The asteroid has been named Asteroid 2023 FT1 by NASA’s Center for Near-Earth Object Studies. The same organization has also revealed its trajectory, distance of close approach and expected speed. Asteroid 2023 FT1 will pass Earth today, April 10, at a distance of 7.4 million kilometers. The asteroid is almost as big as an aircraft, with a width of 110 feet.

NASA has also revealed that this space rock is already rushing towards the planet, travelling at a fearsome speed of 23790 kilometers per hour.

It belongs to the Apollo group of asteroids, which are a group of Near-Earth asteroids named after the humongous 1862 Apollo asteroid, discovered by German astronomer Karl Reinmuth in the 1930s.

Protection against asteroids

To counter these asteroids which head for Earth for potential impact, NASA has already carried out the testing of its DART Mission for planetary protection. The space agency crashed a spacecraft into an oncoming asteroid to successfully divert it from its path.

Source: https://tech.hindustantimes.com/tech/news/110foot-asteroid-2023-ft1-hurtling-towards-earth-says-nasa-travelling-at-blistering-speed-71681089160230.html

Exit mobile version