Planetary Science Research Discoveries

Planetary scientists sharing ideas and discoveries.

Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Planetary Science Division of NASA's Science Mission Directorate and by Hawai'i Space Grant Consortium and is a vital link for planetary and space sciences, and for learning how science works.

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Supported by NASA's SMD Planetary Science Division and Hawai'i Space Grant Consortium.     rss RSS feed     share Share

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» What Made the Doughnuts Inside Lunar Concentric Craters?

(posted August 30, 2016)

Link to article Lunar Concentric Craters. Concentric ridges inside small lunar craters may have formed when intrusion of magma caused uplift of the crater floor.
      You can also download a pdf version. pdf version   PSRD-Lunar-concentric-craters.pdf

Six recent Headline articles. The archive holds all articles in our collection.

6 RECENT HEADLINE ARTICLES.           [  V I E W     A L L  ]

» Rock and Roll at the Apollo 17 Site
The latest orbital images and topographic data offer new insights to the geologic context of Apollo 17 impact melt breccias.

» A Sample from an Ancient Sea of Impact Melt
A lunar breccia from the Apollo 16 site contains a fragment formed in a sea of impact melt 4.2 billion years ago.

» Primordial Molecular Cloud Material in Metal-Rich Carbonaceous Chondrites
Dust from the molecular cloud that gave birth to the Sun may be preserved in objects formed in the outer reaches of the Solar System.

» Primeval Water in the Earth
Hydrogen isotopes in lavas derived from the deep mantle suggest the presence of a component inside the Earth that came directly from the primordial solar nebula.

» Age Rules
Rules for determining the most reliable ages for Moon rocks shed light on what rocks formed when during construction of the ancient lunar highlands crust.

» Making and Differentiating Planets
A detailed study forming Earth and differentiating it into core and mantle shows that it accreted heterogeneously and most water is added after 60% of the Earth had formed.

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CosmoSparks--quick views of big advances. Click here for access to all reports in the series.

In this series of reports PSRD gives quick views of big advances in planetary sciences, with links to further details.

» Measuring and Modeling the Structure of the Best-Preserved Impact Basin on the Moon  -- Orientale basin formation and structure interpreted with GRAIL gravity data and quantitative modeling.

» Asteroids Up Close  -- Remote sensing, returned samples from asteroid missions, and meteorites all help us better understand asteroids.

» A Classic Returns  -- IMPACT! eBook novel tells a story centering around the threat of a big Earth-crossing asteroid that is heading right at us.

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See what PSRD is busy doing at these media links.

PSRDpresents slide sets with notes
This section of PSRD contains annotated slide sets that are associated with our headline articles. We hope you find the slides useful for your own talks and presentations.

Instruments of Cosmochemistry
In this series of articles PSRD highlights the essential tools and amazing technology used by talented scientists seeking to unravel how the solar system formed.

General Resources
This section of PSRD contains links to great information about meteorites, planetary science, and classroom activities.

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