100th lunar asteroid collision confirmed by second telescope

Since March 2017, ESA's NELIOTA project has been regularly looking out for 'lunar flashes' on the moon, to help us better understand the threat posed by small asteroid impacts. The project detects the flash of light produced ...

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 ...

How a speck of light becomes an asteroid

On the first day of the year 1801, Italian astronomer Gioacchino Giuseppe Maria Ubaldo Nicolò Piazzi found a previously uncharted "tiny star" near the constellation of Taurus. The following night Piazzi again observed this ...

Newly discovered comet is likely interstellar visitor

A newly discovered comet has excited the astronomical community this week because it appears to have originated from outside the solar system. The object—designated C/2019 Q4 (Borisov) - was discovered on Aug. 30, 2019, ...

NASA's asteroid-hunting spacecraft a discovery machine

NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission has released its third year of survey data, with the spacecraft discovering 97 previously unknown celestial objects in the last year. Of those, ...

Small asteroid is Earth's constant companion

A small asteroid has been discovered in an orbit around the sun that keeps it as a constant companion of Earth, and it will remain so for centuries to come.

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