Search results for Tunguska

Space Exploration Mar 22, 2019

Why dangerous asteroids heading to Earth are so hard to detect

Earth is often in the firing line of fragments of asteroids and comets, most of which burn up tens of kilometres above our heads. But occasionally, something larger gets through.

Space Exploration Feb 8, 2019

To save the Earth someday, team builds spacecraft to crash into an asteroid and shove it off course

A team of scientists, astronomers and engineers meets weekly in a conference room on a Howard County, Md., research campus and plans to save the world.

Space Exploration Feb 4, 2019

'Oumuamua could be the debris cloud of a disintegrated interstellar comet

Since it was first detected hurling through our solar system, the interstellar object known as 'Oumuamua has been a source of immense scientific interest. Aside from being extrasolar in origin, the fact that it has managed ...

Space Exploration Dec 5, 2018

A meteor may have exploded in the air 3,700 years ago, obliterating communities near the Dead Sea

A meteor that exploded in the air near the Dead Sea 3,700 years ago may have wiped out communities, killed tens of thousands of people, and provided the kernel of truth to an old Bible story. The area is in modern-day Jordan, ...

Optics & Photonics Nov 1, 2018

New photonic devices are said to be poised to enable the next leap in deep space exploration

New directed energy propulsion systems may enable the first interstellar missions, with small, robotic spacecraft exploring neighboring solar systems, according to experimental cosmologist Philip Lubin. He will present these ...

Space Exploration Jun 29, 2018

Image: Australian crater

For Asteroid Day, the Copernicus Sentinel-2A satellite takes us over the Gosses Bluff crater in the Northern Territory of Australia. The crater is visible in the left centre of the image and it is about 22 km in diameter. ...

Space Exploration Jun 7, 2018

Image: Tunguska devastation

Fallen trees at Tunguska, Imperial Russia, seen in 1929, 15 km from epicentre of aerial blast site, caused by explosion of a meteor in 1908 (Photo N. A. Setrukov, 1928).

Space Exploration May 14, 2018

Tracking the threat of asteroids and comets

In 1994, astronomers watched in awe as the comet Shoemaker-Levy 9 crashed into the planet Jupiter, creating massive fireballs exploding with the force of six million megatons of TNT—equivalent to 600 times the world's nuclear ...

Space Exploration Jan 18, 2018

Science Says: That Michigan meteor could have been meatier

The fireball that streaked through the Michigan sky put on quite a show but as far as potentially killer space rocks, it was merely a flash in the pan.

General Physics Oct 31, 2017

How electromagnetism haunts our everyday life

Electromagnetism has haunted the human imagination for thousands of years. From the ghostly Northern Lights of ancient aurora mythology to the evil electromagnetic forces in the popular TV show Twin Peaks, electromagnetic ...

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