| DATE POSTED |
ARTICLES |
| 6 JULY 07
|
The Sun's Crowded Delivery Room
by G. Jeffrey Taylor
Isotopes in meteorites suggest that the Sun formed in a dense cluster of stars. |
 PSRD-iron-60.pdf |
| 18 APRIL 07
|
When Worlds Really Did Collide
by Edward Scott, Jijin Yang, and Joseph Goldstein
Cosmochemical studies and dynamical models of protoplanetary collisions suggest a new origin for iron meteorites. |
PSRD-irons.pdf |
| 25 JAN 07
|
Organic Globules from the Cold Far Reaches of the Proto-Solar Disk
by G. Jeffrey Taylor
Hollow organic globules in the Tagish Lake meteorite probably formed far from the proto-Sun, maybe even in interstellar space before our Solar System formed. |
PSRD-organicGlobules.pdf |
| 27 NOV 06
|
Hit-and-Run as Planets Formed
by G. Jeffrey Taylor
Collisions between large protoplanets as the planets formed may have ripped some of them to shreds, producing molten asteroid-sized bodies, driving off water and other volatiles, and scrambling partially molten protoplanets. |
PSRD-hit-and-run.pdf |
| 21 JULY 06
|
Iron Meteorites as the Not-So-Distant Cousins of Earth
by William F. Bottke and Linda M. V. Martel
Numerical simulations suggest that some iron meteorites are fragments of the long lost precursor material that formed the Earth and other terrestrial planets. |
PSRD-asteroidGatecrashers.pdf |
| 24 AUG 06
|
Wandering Gas Giants and Lunar Bombardment
by G. Jeffrey Taylor
Outward migration of Saturn might have triggered a dramatic increase in the bombardment rate on the Moon 3.9 billion years ago, an idea testable with lunar samples. |
PSRD-cataclysmDynamics.pdf |
| 31 JAN 06
|
Cosmochemistry from Nanometers to Light-Years
by G. Jeffrey Taylor
Cosmochemists and astronomers test theories on the formation of stars and planets. |
PSRD-protoplanetary.pdf
|
| 31 MAY 05
|
Making Sense of Droplets Inside Droplets
by G. Jeffrey Taylor
The vexing presence of chondrules inside supposedly older calcium-aluminum-rich inclusions (CAIs) in chondrites makes sense if the CAIs were remelted. |
PSRD-chondrulesCAIs.pdf
|
| 1 JUNE 04
|
Silicate Stardust in Meteorites
by G. Jeffrey Taylor
Silicates are the most abundant solids in disks around growing stars, but presolar silicates have not been found in even the most primitive meteorite--until now.
|
PSRD-silicatesMeteorites.pdf
|
| 29 AUG 03 |
A New Type of Stardust
by G. Jeffrey Taylor
Interplanetary dust particles contain rare grains that formed in stars older than the Sun.
|
PSRD-stardust.pdf
|
| 21 MAY 03 |
Triggering the Formation of the Solar System
by G. Jeffrey Taylor
New data from meteorites indicates that formation of the Solar System was triggered by a supernova.
|
PSRD-SolarSystemTrigger.pdf
|
| 12 DEC 02 |
Tagish Lake -- A Meteorite from the Far Reaches of the Asteroid Belt
by David W. Mittlefehldt
A new type of primitive meteorite with much to tell us about the formation of the solar system.
|
PSRD-TagishLake.pdf
|
| 24 OCT 02 |
The First Rock in the Solar System
by Steven B. Simon
An aggregate of corundum, hibonite, and perovskite may be among the first rocks to form in the Solar System.
|
PSRD-firstRock.pdf
|
| 30 SEPT 02 |
Using Aluminum-26 as a Clock for Early Solar System Events
by Ernst Zinner
Correspondence between 26Al and Pb-Pb ages shows that 26Al records a detailed record of events in the early solar system.
|
PSRD-Al26clock.pdf
|
| 25 SEPT 02 |
Dating the Earliest Solids in our Solar System
by Alexander N. Krot
Lead isotopic analyses give absolute formation ages of Ca-Al-rich inclusions and chondrules.
|
PSRD-isotopicAges.pdf
|
| 3 DEC 01 |
Oxygen Isotopes Give Clues to the Formation of Planets, Moons, and Asteroids
by Edward R. D. Scott
As they formed from gas and dust near the Sun, grains in some meteorites acquired oxygen that originated in numerous other stars that shone long before our solar system was born. |
PSRD-Oisotopes.pdf
|
| 21 AUG 01 |
Uranus, Neptune, and the Mountains of the Moon
by G. Jeffrey Taylor
The tardy formation of Uranus and Neptune might have caused the intense bombardment of the Moon 3.9 billion years ago. |
PSRD-bombardment.pdf
|
| 2 MAR 01 |
Relicts from the Birth of the Solar System
by G. Jeffrey Taylor
Rapidly cooled silicate droplets found in unusual meteorites may have formed directly from the cloud of gas and dust surrounding the young Sun. |
PSRD-relicts.pdf
|
| 30 SEPT 00 |
The Oldest Metal in the Solar System
by G. Jeffrey Taylor
Grains of metallic iron in some chondritic meteorites condensed from hot clouds of gas and dust while the Sun was forming. |
PSRD-primitiveFeNi.pdf
|
| 28 MAR 00 |
Supernova Debris in the Solar System
by G. Jeffrey Taylor
Calculations suggest that a supernova explosion would distribute its debris uniformly throughout the cloud of gas and dust from which the Solar System formed. |
PSRD-supernovaDebris.pdf
|
| 24 AUG 99 |
Honeycombed Asteroids
by G. Jeffrey Taylor
Asteroids have lower densities than expected, probably because they have been disrupted and then reassembled into porous rubble piles. |
PSRD-asteroidDensity.pdf
|
| 8 FEB 99 |
From a Cloud of Gas and Dust to an Asteroid with Percolating Hot Water
by G. Jeffrey Taylor
Isotopes of manganese and chromium indicate that chemical reactions involving hot water altered minerals on water-bearing asteroids during the same time interval that other asteroids were melted, between 7 and 16 million years after the first solids formed in the Solar System. |
PSRD-fayalite.pdf
|
| 12 NOV 98 |
Dry Droplets of Fiery Rain
by G. Jeffrey Taylor
Experiments test an idea for the origin of droplets of rocky material melted before the planets formed. |
PSRD-chondrules.pdf
|
| 8 JULY 97 |
Moving Stars and Shifting Sands of Presolar History.
by Donald D. Clayton
Meteorites contain tiny grains of minerals cast off from ancient stars before the birth of our own Solar System. These grains tell a story of element formation, motions inside stars, and migration of stars in the Galaxy. |
PSRD-Stardust.pdf
|
