asteroid impact – आवारा मुसाफिर

Dinosaur-killing asteroid impact fouled Earth’s atmosphere with dust

October 31, 2023581 Views

It was, to put it mildly, a bad day on Earth when an asteroid smacked Mexico's Yucatan Peninsula 66 million years ago, causing a global calamity that erased three-quarters of the world's species and ended the age of dinosaurs. The immediate effects included wildfires, quakes, a massive shockwave in the air and huge standing waves in the seas. But the coup de grâce for many species may have been the climate catastrophe that unfolded in the following years as the skies were darkened by clouds of debris and temperatures plunged. Researchers on Monday revealed the potent role that dust from pulverized rock ejected into the atmosphere from the impact site may have played in driving extinctions, choking the atmosphere and blocking plants from harnessing sunlight for life-sustaining energy...

अंतरिक्ष विज्ञान

What happened when NASA’s DART collided with asteroid Dimorphos

AWARA MUSAFIR BUREAU

March 22, 2023611 Views

First results are out from ESO telescopes on the aftermath of asteroid impact Using ESO’s Very Large Telescope (VLT), two teams of astronomers have observed the aftermath of the collision between NASA’s Double Asteroid Redirection Test (DART) spacecraft and the asteroid Dimorphos. The controlled impact was a test of planetary defence, but also gave astronomers a unique opportunity to learn more about the asteroid’s composition from the expelled material. This series of images, taken with the MUSE instrument on ESO’s Very Large Telescope, shows the evolution of the cloud of debris that was ejected when NASA’s DART spacecraft collided with the asteroid Dimorphos. The first image was taken on 26 September 2022, just before the impact, and the last one was taken almost one month later o...

खबरनामाघटनाएं

Dinosaurs’ Last Spring: Study pinpoints timing of Chicxulub asteroid impact

AWARA MUSAFIR BUREAU

December 11, 2021542 Views

Ground-breaking Study Confirms Time of Year When Asteroid Wiped Out Dinosaurs and 75 Percent of Life on Earth A ground-breaking study led by researchers at Florida Atlantic University and an international team of scientists conclusively confirms the time year of the catastrophic Chicxulub asteroid, responsible for the extinction of dinosaurs and 75 percent of life on Earth 66 million years ago. Springtime, the season of new beginnings, ended the 165-million-year reign of dinosaurs and changed the course of evolution on Earth. Results of the study, published in the journal Scientific Reports, greatly enhances the ability to trace the first stages of damage to life on Earth. FAU’s Robert DePalma, senior author and an adjunct professor in the Department of Geosciences, Charles E. S...