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 Cosmochemistry Program 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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» A Sample from an Ancient Sea of Impact Melt

(posted June 2, 2016)

Link to article 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.
      You can also download a pdf version. pdf version   PSRD-Lunar-impact-melt.pdf

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

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

» 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.

» Chondritic Asteroids–When Did Aqueous Alteration Happen?
New dates determined for aqueous alteration on chondritic parent bodies, based on a new mineral standard, have big implications on the timing and location of accretion.

» Tungsten Isotopes, Formation of the Moon, and Lopsided Addition to Earth and Moon
A distinct difference in tungsten isotopic composition between the Moon and Earth is consistent with the Moon and Earth starting with the same isotopic composition, but then modified by late accretion of different amounts of chondritic asteroids.


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  Reports
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 cosmochemistry, with links to further details.

» An Improved Calibration of Reflectance Data from LOLA  -- An Icarus special issue presents new results from NASA's Lunar Reconnaissance Orbiter, including LOLA data, relevant to space weathering and many other topics of interest.

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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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