impact crater

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impact crater

[′im‚pakt ‚krād·ər]
(geology)
A crater formed on a planetary surface by the impact of a projectile.
References in periodicals archive ?
NASA officials said the spacecraft will be designed to touch down on multiple locations like impact craters and dunes, to look for the building blocks of life.
This indicated that large impact craters formed over the same period and in the same terrains should also be preserved.
Ralph Lorenz's article about viewing impact craters from commercial airplane flights (S&T: June 2018, p.
The aerial survey confirmed there was a huge pit with an elevated, circular rim and uplifting structures in the centre, all telltale signs of an impact crater. The team's analysis showed that the Hiawatha crater was nearly 300 metres deep and 30 kilometres in diameter, placing it among Earth's 25 largest impact craters, although much smaller than the 140-kilometre crater left by the dino-busting Chicxulub impact.
So it was but natural that following the dream she read all she could find about impact craters, which are formed by the hypervelocity impact of a meteorite or other celestial object crashing onto a planet's (or moon's) surface.
Hundreds of impact craters have been identified across the planet, some measuring a few metres up to several miles across.
For the present analysis the raw images* obtained by the New Horizons' LORRI as of 14th September 2015 were visually inspected in order to find an image showing impact craters of Pluto with the highest resolution possible.
They cover the role of meteorite impact in the origin of life, making craters: from the small to the big, products of planetary impacts, and remote sensing methods to study impact craters. Among the topics are characteristics of impact craters in the northern hemisphere of Mars, scaling basin-sized impacts and the influence of target temperature, microscopic effects of shock metamorphism in zircons from the Haughton impact structure in Canada, and real-time crater profile analysis: visualizing high-resolution laser altimetry data sets on the graphics processing unit.
The data provide a clearer picture of dents on the moon's surface formed by impact craters, researchers report October 30 in Science Advances.
Spacecraft have snapped pictures of impact craters on Mercury, Venus and many of the moons of Jupiter, Saturn and Uranus (see slideshow below).
"In contrast, our study identifies ancient seawater that remains in place in its geologic setting, enabling us to provide a direct estimate of its age and salinity." The largest crater discovered in the United States, the Chesapeake Bay impact crater is one of only a few oceanic impact craters that have been documented worldwide.
All of the larger polar deposits are located on the floors or walls of impact craters. Deposits farther from the pole are seen to be concentrated on the north-facing sides of craters.