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Meteorite smashed through Oslo roof : Views and News from Norway - 0 views

  • sure when the meteorite actually crashed through the cabin’s roof, because the cabin had been closed during the winter.
  • cross-section that it contains bits of many different particles that are compressed together
  • indicates that another, larger meteorite smashed rock on another planet before the meteorite found in Oslo was propelled into outer space
Mars Base

Fikk meteorittstein gjennom taket i kolonihagen - VG Nett om Utrolige historier - 0 views

Mars Base

Mars Rover Curiosity Proves Some Earth Meteorites are Martian | Space.com - 0 views

  • New data collected by NASA's Mars rover Curiosity has pinned down the exact ratio of two forms of the inert gas argon in the Martian atmosphere
  • help confirm the origins of some meteorites
  • could also help researchers understand how and when Mars lost most of its atmosphere
  • ...6 more annotations...
  • By understanding exactly how much of the lighter isotope argon-36 is present in the Martian atmosphere and comparing it to the heavier isotope, argon-38, scientists were able to confirm what the composition of a Martian meteorite on Earth should be
  • Curiosity found that the argon ratio for Mars is 4.2. The lighter form of argon has escaped more readily than the heavier isotope
  • Before this new study, scientists had placed the argon ratio somewhere between 3.6 and 4.5 by analyzing gas trapped inside Martian meteors on Earth
  • Argon is the clearest signature of atmospheric loss because it's chemically inert and does not interact
  • Curiosity is unable to directly investigate how much atmosphere Mars is losing, NASA's next Mars mission is designed to do just that
  • The MAVEN spacecraft (the name is short for Mars Atmosphere and Volatile Evolution Mission) will launch toward the Red Planet in November
Mars Base

June 30 - Today in Science History - Scientists born on June 30th, died, and events - 0 views

  • Tunguska meteorite
  • In 1908, at around 7:15 am, northwest of Lake Baikal, Russia, a huge fireball nearly as bright as the Sun was seen crossing the sky. Minutes later, there was a huge flash and a shock wave felt up to 650 km (400 mi) away. Over Tunguska, a meteorite over 50-m diameter, travelling at over 25 km per second (60,000 mph) penetrated Earth's atmosphere, heated to about 10,000 ºC and detonated 6 to10 km above the ground. The blast released the energy of 10-50 Megatons of TNT, destroying 2,200 sq km of forest leaving no trace of life. The Tunguska rock came out of the Taurid Meteor storm that crosses Earth's orbit twice a year. The first scientific expedition for which records survive was made by Russian mineralogist Leonid Kulik in 1927
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