2015 in science and Impact crater

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Difference between 2015 in science and Impact crater

2015 in science vs. Impact crater

A number of significant scientific events occurred in 2015. An impact crater is an approximately circular depression in the surface of a planet, moon, or other solid body in the Solar System or elsewhere, formed by the hypervelocity impact of a smaller body.

Asteroid

Asteroids are minor planets, especially those of the inner Solar System.

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Atmosphere

An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

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Chicxulub crater

The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico.

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Cretaceous–Paleogene extinction event

The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of some three-quarters of the plant and animal species on Earth, approximately 66 million years ago.

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Ganymede (moon)

Ganymede (Jupiter III) is the largest and most massive moon of Jupiter and in the Solar System.

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Impact event

An impact event is a collision between astronomical objects causing measurable effects.

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Isidis Planitia

Isidis Planitia is a plain located inside a giant impact basin on Mars, centered at; Isidis Planitia is partly in the Syrtis Major quadrangle and partly in the Amenthes quadrangle.

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List of impact craters on Earth

This list of impact craters on Earth contains a selection of the 190 confirmed craters given in the Earth Impact Database.

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Mars

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

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Mercury (planet)

Mercury is the smallest and innermost planet in the Solar System.

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Moon

The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

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Porosity

Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%.

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Sinkhole

A sinkhole, also known as a cenote, sink, sink-hole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.

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Solar System

The Solar SystemCapitalization of the name varies.

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Titan (moon)

Titan is the largest moon of Saturn.

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Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.

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