About: Layered asteroids   Sponge Permalink

An Entity of Type : owl:Thing, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

This is an article about space. There are many asteroids, especially big asteroids, that have heavy element cores and lighter element outer layers, just like planets. It is common that asteroids are shattered into pieces, and pieces of shattered layered asteroids obviously comes from only one layer, just like pieces of planets blown into space. This means that their chemical element signature is not that of undifferentiated asteroids. And since undifferentiated asteroids are the standard by which traditional geology identifies asteroids that have once hit Earth (chemical signatures like "the iridium signature"), lots of asteroid impacts are therefore unknown. The low asteroid impact rate in present time can be explained by impacts being concentrated to time periods when a big asteroid have

AttributesValues
rdfs:label
  • Layered asteroids
rdfs:comment
  • This is an article about space. There are many asteroids, especially big asteroids, that have heavy element cores and lighter element outer layers, just like planets. It is common that asteroids are shattered into pieces, and pieces of shattered layered asteroids obviously comes from only one layer, just like pieces of planets blown into space. This means that their chemical element signature is not that of undifferentiated asteroids. And since undifferentiated asteroids are the standard by which traditional geology identifies asteroids that have once hit Earth (chemical signatures like "the iridium signature"), lots of asteroid impacts are therefore unknown. The low asteroid impact rate in present time can be explained by impacts being concentrated to time periods when a big asteroid have
dcterms:subject
abstract
  • This is an article about space. There are many asteroids, especially big asteroids, that have heavy element cores and lighter element outer layers, just like planets. It is common that asteroids are shattered into pieces, and pieces of shattered layered asteroids obviously comes from only one layer, just like pieces of planets blown into space. This means that their chemical element signature is not that of undifferentiated asteroids. And since undifferentiated asteroids are the standard by which traditional geology identifies asteroids that have once hit Earth (chemical signatures like "the iridium signature"), lots of asteroid impacts are therefore unknown. The low asteroid impact rate in present time can be explained by impacts being concentrated to time periods when a big asteroid have been recently shattered (and big asteroids tend to be layered).
Alternative Linked Data Views: ODE     Raw Data in: CXML | CSV | RDF ( N-Triples N3/Turtle JSON XML ) | OData ( Atom JSON ) | Microdata ( JSON HTML) | JSON-LD    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 07.20.3217, on Linux (x86_64-pc-linux-gnu), Standard Edition
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2012 OpenLink Software