Meteor Crater, Arizona. This crater is the result of an impact of a 50m meteor, whereas the impacts described in the current work may have been hundreds of times bigger. Credit: Dr. Dale Nations, AZGS Scientists know that the Earth was bombarded by huge impactors in distant time, but a […]

Artist’s concept of NASA’s WISE spacecraft, which was an infrared-wavelength astronomical space telescope active from December 2009 to February 2011. In September 2013 the spacecraft was assigned a new mission as NEOWISE to help find near-Earth asteroids and comets. Credit: NASA/JPL-Caltech NEOWISE has provided an estimate of the size of […]

A cross-polarized image of the Artracoona meteorite under 50 times magnification. Credit: Michael Lucas. One Friday evening in 1992, a meteorite ended a more than 150 million-mile journey by smashing into the trunk of a red Chevrolet Malibu in Peekskill, New York. The car’s owner reported that the 30-pound remnant […]

This illustration shows a near-Earth asteroid like asteroid 2020 SW traveling through space. Credit: NASA/JPL-Caltech Roughly 15 to 30 feet wide, the object will make its closest approach on September 24. A small near-Earth asteroid (or NEA) will briefly visit Earth’s neighborhood on Thursday, September 24, zooming past at a […]

The Earth is the only planet known to have liquid water on its surface, a fundamental characteristic when it comes to explaining the emergence of life. However, was this water always present in the rocks that made up our planet? Alternatively, was it delivered later by asteroids and comets that […]

OSIRIS-REx observed small bits of material leaping off the surface of the asteroid Bennu on January 19, 2019. (Credit: NASA/Goddard/University of Arizona/Lockheed Martin) In January 2019, NASA’s OSIRIS-REx spacecraft was orbiting the asteroid Bennu when the spacecraft’s cameras caught something unexpected: Thousands of tiny bits of material, some just the size of marbles, began […]

A new study published in Science finds that Earth’s water may have come from materials that were present in the inner solar system at the time the planet formed — instead of far-reaching comets or asteroids delivering such water. Enstatite chondrite meteorites, once considered ‘dry,’ contain enough water to fill […]

Artist’s concept of Lucy spacecraft at Trojan asteroid. Credit: NASA NASA’s first mission to explore the Trojan asteroids is one step closer to launch. The Discovery Program’s Lucy mission passed a critical milestone and is officially authorized to transition to its next phase. This major decision was made after a […]

This illustration shows asteroid 2020 QG’s trajectory bending during its close approach to Earth. The asteroid is the closest known nonimpacting asteroid ever detected. Credit: NASA/JPL-Caltech    ANIMATION An tiny aseroid flew past our planet over the weekend and was detected by aNASA-funded asteroid survey as it departed. Near Earth […]