A mystery of the moon that imperiled astronauts and spacecraft on lunar missions has been solved by a Purdue University-led team of scientists as part of NASA's GRAIL mission.
Space Exploration
May 30, 2013
12
1
Evidence that catastrophic geological events could have created evolutionary bottlenecks that changed the course of life on Earth may be buried within ancient rocks beneath our feet.
Astronomy
Oct 16, 2018
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216
(PhysOrg.com) -- Shortly after the Moon formed, an asteroid smacked into its southern hemisphere and gouged out a truly enormous crater, the South Pole-Aitken basin, almost 1,500 miles across and more than five miles deep.
Space Exploration
Mar 4, 2010
1
66
In a geological period 469 million years ago known as the Ordovicium Period, Earth's seas were inhabited by animals like trilobites (reminiscent of pillbugs), conodonts (eel-like vertebrates) and brachiopods (animals with ...
Plants & Animals
Nov 10, 2021
0
430
The moon was exposed to a heavy bombardment of asteroids 3.9 billion years ago. The origin of this bombardment, however, was previously unclear. Planetologists at Münster University have now tested these hypotheses with ...
Planetary Sciences
Nov 8, 2021
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475
Evidence from the fragments of a destroyed asteroid suggests that the shift in the positions of the giant planets in our solar system billions of years ago happened between 60–100 million years after the solar system's ...
Planetary Sciences
Apr 16, 2024
0
130
(PhysOrg.com) -- Moon's craters, together with samples of the surface returned during the Apollo program, tell the story of impacts from two different populations of small bodies. The first rocky collection was gradually ...
Space Exploration
Mar 19, 2012
0
0
(Phys.org) -- Researchers are learning details about asteroid impacts going back to the Earth's early history by using a new method for extracting precise information from tiny "spherules" embedded in layers of rock.
Earth Sciences
Apr 25, 2012
1
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