Western-led team investigates interstellar bodies originating from beyond our solar system

Astonishingly, not one but two interstellar asteroids have been detected entering our solar system since 2017. The first was given the Hawaiian name ‘Oumuamua, meaning ‘messenger from afar,’ after its discovery by Canadian astronomer Robert Weryk. The second, 2I/Borisov, was named for its discoverer Gennadiy Borisov. Paul Wiegert from Western University’s Institute for Earth & … Read more Western-led team investigates interstellar bodies originating from beyond our solar system

It really was the asteroid

Fossil remains of tiny calcareous algae not only provide information about the end of the dinosaurs, but also show how the oceans recovered after the fatal asteroid impact. Experts agree that a collision with an asteroid caused a mass extinction on our planet, but there were hypotheses that ecosystems were already under pressure from increasing … Read more It really was the asteroid

Dust from a giant asteroid crash caused an ancient ice age

About 466 million years ago, long before the age of the dinosaurs, the Earth froze. The seas began to ice over at the Earth’s poles, and the new range of temperatures around the planet set the stage for a boom of new species evolving. The cause of this ice age was a mystery, until now: … Read more Dust from a giant asteroid crash caused an ancient ice age

Rare metallic asteroids might have erupted molten iron

The metallic asteroid Psyche has mystified scientists because it is less dense than it should be, given its iron-nickel composition. Now, a new theory could explain Psyche’s low density and metallic surface. Unlike most asteroids, Psyche appears to be composed largely of iron and nickel instead of rocky rubble. Metal-rich asteroids are thought to have … Read more Rare metallic asteroids might have erupted molten iron

Rocks at asteroid impact site record first day of dinosaur extinction

When the asteroid that wiped out the dinosaurs slammed into the planet, the impact set wildfires, triggered tsunamis and blasted so much sulfur into the atmosphere that it blocked the sun, which caused the global cooling that ultimately doomed the dinos. That’s the scenario scientists have hypothesized. Now, a new study led by The University … Read more Rocks at asteroid impact site record first day of dinosaur extinction

Images from the surface of asteroid Ryugu yield clues to its composition

New images taken by a lander on the surface of the near-Earth asteroid Ryugu have yielded clues into the composition and origins of its rocks, which bear strong similarities to primitive meteorites called carbonaceous chondrites. The findings from Ralf Jaumann and colleagues present evidence linking the asteroid to a particular class of meteorites, supporting theories … Read more Images from the surface of asteroid Ryugu yield clues to its composition

Laboratory analysis of meteorites have shown evidence that asteroids migrated towards the asteroid belt from the outer solar system

The international research team including W. Fujiya (Faculty of Science, Ibaraki University), P. Hoppe (Max Planck Institute for Chemistry in Germany), T. Ushikubo (Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology: JAMSTEC), and Y. Sano (Atmosphere and Ocean Research Institute, The University of Tokyo) estimated the amounts of dry ice … Read more Laboratory analysis of meteorites have shown evidence that asteroids migrated towards the asteroid belt from the outer solar system