Friday November 24, 2017
Home Science & Technology Asteroids Str...

Asteroids Strike on Earth is Inevitable, Likely to Affect Millions of People: Study

Over 1800 Potentially Dangerous Objects Have Been Identified Near Earth

0
104
Earth , asteroid attacks
Earth is susceptible to asteroid attacks and it’s just a matter of time when it is going to happen. Pixabay
  • It is a case of when an asteroid collision will happen, rather than if it will happen
  • The asteroid warning comes ahead of the world asteroid day on 30th June
  • A Czech scientist who has analyzed 144 fireballs from meteor showers has already warned that the risk of a big-sized asteroid hitting earth surface is pretty high

June 23, 2017:

Earth is susceptible to asteroid attacks and it’s just a matter of time when it is going to happen. Any asteroid attack or outer space stuff on any major city could do a significant damage and millions of live would be affected.

Alan Fitzsimmons from Queen’s University Belfast in Britain, said “it is a case of when an asteroid collision will happen, rather than if it will happen.”

The asteroid warning comes ahead of the world asteroid day on 30th June. It is so because, on 30th June, 1908, an asteroid of small size exploded over Siberia which even out 2000 sq kilometres of area.

However this year’s world asteroid day would contain discussions and presentations which will be live streamed from Luxembourg in which Apollo 9 astronaut Rusty Schweickart and International Space Station astronaut Nicole Stott will answer questions from people on social media.

ALSO READ: NASA’s OSIRIS-REx Spacecraft begins 2-week search for Earth-Trojan asteroids

Mr Fitzsimmons told that scientists have worked at great lengths to recognise near earth asteroids and how much damage they can yield upon striking. He also told that over 1800 potentially dangerous objects have been identified near earth and many more are to be found.

However, he has said, “Astronomers find near-Earth asteroids every day and most are harmless. But it is still possible the next Tunguska would take us by surprise, and although we are much better at finding larger asteroids that does us no good if we are not prepared to do something about them.”

A Czech scientist who has analysed 144 fireballs from meteor showers has already warned that the risk of a big-sized asteroid hitting earth surface is pretty high.

– by Sumit Balodi of NewsGram. Twitter: @sumit_balodi

Next Story

Researchers Claim The Existence Of Planet Nine

Researchers from an American University have laid evidences to prove the presence of Planet Nine

0
558
Planet Nine
Kuiper Belt indicates the presence of Planet Nine
  • The science communities since a long time have been debating upon the existence of Planet Nine. 
  • Space highlights different shreds of evidence based on which scientists are stating the claim.

What Is Planet Nine?

Planet Nine is a hypothetical planet present in the far outer Solar System, whose mass is estimated to be 10 times more than the mass of Earth. The planet is said to be 20 times farther than the sun than Neptune is.

What Do Researchers Have To Say?

Dr Konstantin Batygin, a planetary astrophysicist at the California Institute of Technology, said that there were five different lines of observational evidence which pointed to the existence of Planet Nine. He stated that if this theory does not sound believable, then people would have to come up with the answers of the five pieces of evidence which could lead to further confusion.

Also Read: Five Students from Telangana Selected for the NASA Human Exploration Rover Challenge

Batygin in 2016 published a study examining the six known objects in the Kuiper Belt, a  circumstellar disc in the Solar System beyond the planets that extends from the orbit of Neptune towards interstellar space.

The study examines all the objects have elliptical orbits pointing in the same direction and are tilted the same way. These serve as evidence to the planet’s existence.

It is being said that the objects are tilted 30 degrees downward compared to the plane where the eight official planets circle the sun. Researchers also made use of computer simulations of the solar system including the Planet Nine and to demonstrate that there should be more objects tilted a whopping 90 degrees to solar plane. It was revealed that five such objects, which fit these parameters were already known.

The study led to the birth of two more ideas. Researchers said that this planet could have tilted the planets of the solar system during the last 4.5 billion years.

Planet Nine’s existence could also tell the reason as to why Kuiper Belt objects orbit in the opposite direction as compared to other things in the solar system.

-Prepared by Megha Acharya of NewsGram.

(the story was originally published in PTI)

Next Story

Earth lost 40% mass during formation

0
37
Earth lost 40% mass during formation
Earth lost 40% mass during formation. IANS

London, Sep 28: The violent and chaotic process that led to the formation of Earth resulted in the loss of more than 40 per cent of its mass, says a study.

Analysing a mixture of earth samples and meteorites, the scientists shed new light on the sequence of events that led to the creation of our home planet.

Planets grow by a process of accretion – a gradual accumulation of additional material – in which they collisionally combine with their neighbours.

This is often a chaotic process and material gets lost as well as gained, said the study published in the journal Nature.

Massive planetary bodies impacting at several kilometres per second can generate substantial heat which, in turn, produces magma oceans and temporary atmospheres of vaporised rock.

Repeated loss of this vapour envelope during continued collisional growth causes the planet’s composition to change substantially.

“We have provided evidence that such a sequence of events occurred in the formation of the Earth and Mars, using high precision measurements of their magnesium isotope compositions,” said lead researcher Remco Hin from University of Bristol in Britain.

“Magnesium isotope ratios change as a result of silicate vapour loss, which preferentially contains the lighter isotopes. In this way, we estimated that more than 40 per cent of the Earth’s mass was lost during its construction,” he said.

For the study, the researchers analysed samples of the Earth together with meteorites from Mars and the asteroid Vesta, using a new technique to get higher quality measurements of magnesium isotope ratios than previously obtained.

“We now show that vapour loss during the high energy collisions of planetary accretion has a profound effect on a planet’s composition,” Hin said.

“This process seems common to planet building in general, not just for Earth and Mars, but for all planets in our Solar System and probably beyond, but differences in the collision histories of planets will create a diversity in their compositions,” he added. (IANS)

Leave a Reply

Your email address will not be published.

Next Story

NASA’s Asteroid-chasing Spacecraft Osiris-Rex Swinging by Earth on Way to Space Rock

0
34
spacecraft
Artist concept of OSIRIS-REx at asteroid Bennu, a remnant from the dawn of the solar system that may hold clues to the origins of life. Credit: NASA’s Goddard Space Flight Center/Conceptual Image Lab. VOA

NASA’s asteroid-chasing spacecraft is swinging by Earth on its way to a space rock.

Launched a year ago, Osiris-Rex will pass within about 11,000 miles (17,700 kilometers) of the home planet Friday afternoon. It will use Earth’s gravity as a slingshot to put it on a path toward the asteroid Bennu.

Also Read: NASA’S OSIRIS-REX mission to flyby Earth on Friday 

If all goes well, Osiris-Rex should reach the small, roundish asteroid next year and, in 2020, collect some of its gravel for return to Earth.

Friday’s close approach will occur over Antarctica. It will be a quick hello: The spacecraft will speed by at about 19,000 mph (31,000 kph). NASA has taken precautions to ensure Osiris-Rex does not slam into any satellites. Ground telescopes, meanwhile, have been trying to observe the spacecraft while it’s in the neighborhood.

(VOA)