Tuesday October 23, 2018
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
//
183
Earth , asteroid attacks
Earth is susceptible to asteroid attacks and it’s just a matter of time when it is going to happen. Pixabay
Republish
Reprint
  • 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

Click here for reuse options!
Copyright 2017 NewsGram

Next Story

Habitability Of Surrounding Planets Affected By Super Flares Of Red Dwarfs: NASA

Red dwarfs -- especially young red dwarfs -- are active stars, producing flares blast out energy

0
NASA, space, red dwarf
Superflares from red dwarfs may affect habitability of planets Pixabay

Using NASA’s Hubble Space Telescope, astronomers have found that violent outbursts, or superflares, from red dwarf stars could affect the habitability of any planets orbiting it.

Young low-mass stars flare much more frequently and more energetically than old stars and middle-age stars like our Sun, the findings of the study published in the Astrophysical Journal showed.

The findings are based on observations of the flare frequency of 12 red dwarfs.

Hubble is observing such stars through a large programme called HAZMAT — Habitable Zones and M dwarf Activity across Time.

“M dwarf” is the astronomical term for a red dwarf star — the smallest, most abundant and longest-living type of star in our galaxy.

Hubble Telescope. red dwarf
Hubble Telescope. Flickr

The HAZMAT programme is an ultraviolet survey of red dwarfs at three different ages — young, intermediate, and old.

“The goal of the HAZMAT programme is to help understand the habitability of planets around low-mass stars,” explained the programme’s principal investigator, Evgenya Shkolnik from Arizona State University.

“These low-mass stars are critically important in understanding planetary atmospheres,” Shkolnik added.

Stellar flares from red dwarfs are particularly bright in ultraviolet wavelengths, compared with Sun-like stars.

Red dwarf  planet
Artist’s view of planets transiting red dwarf star in TRAPPIST-1 system. Flickr

Hubble’s ultraviolet sensitivity makes the telescope very valuable for observing these flares.

The flares are believed to be powered by intense magnetic fields that get tangled by the roiling motions of the stellar atmosphere.

When the tangling gets too intense, the fields break and reconnect, unleashing tremendous amounts of energy.

The team found that the flares from the youngest red dwarfs they surveyed — just about 40 million years old — are 100 to 1,000 times more energetic than when the stars are older.

This younger age is when terrestrial planets are forming around their stars.

Red dwarf
This illustration shows a red dwarf star orbited by a hypothetical exoplanet. NASA

About three-quarters of the stars in our Milky Way galaxy are red dwarfs. Most of the galaxy’s “habitable-zone” planets — planets orbiting their stars at a distance where temperatures are moderate enough for liquid water to exist on their surface — orbit red dwarfs.

In fact, the nearest star to our Sun, a red dwarf named Proxima Centauri, has an Earth-size planet in its habitable zone.

Also Read: NASA Plans For Science Payloads For Delivery To Moon

However, red dwarfs — especially young red dwarfs — are active stars, producing flares that could blast out so much energy that it disrupts and possibly strips off the atmospheres of these fledgling planets. (IANS)