okt 092013
 
First Ever Evidence of a Comet Striking Earth

  The first ever evidence of a comet entering Earth’s atmosphere and exploding, raining down a shock wave of fire which obliterated every life form in its path, has been discovered by a team of South African scientists and international collaborators, and will be presented at a public lecture on Thursday. An artist’s rendition of [continue reading]

aug 312012
 
Dawn Prepares for Trek Toward Dwarf Planet Ceres

  NASA’s Dawn spacecraft is on track to become the first probe to orbit and study two distant Solar System destinations, to help scientists answer questions about the formation of our Solar System. The spacecraft is scheduled to leave the giant asteroid Vesta on Sept. 4 PDT (Sept. 5 EDT) to start its two-and-a-half-year journey [continue reading]

aug 032012
 
Supernova Explosions Polluted the Solar System

  For decades it has been thought that a shock wave from a supernova explosion triggered the formation of our Solar System. According to this theory, the shock wave also injected material from the exploding star into a cloud of dust and gas, and the newly polluted cloud collapsed to form the Sun and its [continue reading]

jul 182012
 
Astronomers Explain Earth's Lack of Water

  With large swaths of oceans, rivers that snake for hundreds of miles, and behemoth glaciers near the north and south poles, Earth doesn’t seem to have a water shortage. And yet, less than one percent of our planet’s mass is locked up in water, and even that may have been delivered by asteroids after [continue reading]

mei 042012
 
Lightning Signature Could Help Reveal Solar System's Origins

  Every second, lightning flashes some 50 times on Earth. Together these discharges coalesce and get stronger, creating electromagnetic waves circling around Earth, to create a beating pulse between the ground and the lower ionosphere, about 60 miles up in the atmosphere. This electromagnetic signature, known as Schumann Resonance, had only been observed from Earth’s [continue reading]

apr 032012
 
New Finding Affects Understanding of Formation of the Solar System

Notre Dame physicists determine new half-life for radioactive rare-earth atom A global collaboration including five University of Notre Dame researchers has revised the half-life of samarium-146 (146Sm), reducing it to 68 million years from 103 million years. The finding is published in the journal Science. The revised half-life, which is 34 percent shorter than the [continue reading]