Our planet’s history includes episodes of cold so extreme that glaciers reached sea level in equatorial regions. Source: https://earthsky.org/earth/whats-coldest-earth-has-ever-been…
Tag: snowball
Gemini Observatory images reveal striking details of comet NEOWISE
When Comet NEOWISE (C/2020 F3) sped through the inner Solar System during the middle of 2020, astronomers and the general public watched in awe as this “dirty snowball” shed gas and dust into space, producing a striking show visible to the naked eye. Close-up observations, led by Michal Drahus and Piotr Guzik of Jagiellonian University in Krakow, used the international Gemini…
A Plunge In Incoming Sunlight May Have Triggered ‘Snowball Earths’
Jennifer Chu writes via Phys.Org: At least twice in Earth’s history, nearly the entire planet was encased in a sheet of snow and ice. These dramatic “Snowball Earth” events occurred in quick succession, somewhere around 700 million years ago, and evidence suggests that the consecutive global ice ages set the stage for the subsequent explosion of complex, multicellular life on Earth….
SpaceX’s Starlink Satellites Accused of ‘Photo-Bombing’ Shots of Comet Neowise
“Comet Neowise has been the brightest and most visible space snowball in a generation, but it’s also the first naked-eye comet to visit us in the new era of satellite mega-constellations like SpaceX’s Starlink,” writes CNET. “In just the latest episode of Starlink ‘trains’ irritating astronomers, a number of images have been circulating of the satellites photo-bombing Comet Neowise glamour shots…”…
The moon may have stopped the early Earth from being a frozen snowball
Astronomers have long been puzzled by the faint young sun paradox, which says the sun would not have been bright enough in the past to keep Earth warm. Now it seems the moon may have helped Source: https://www.newscientist.com/article/2248638-the-moon-may-have-stopped-the-early-earth-from-being-a-frozen-snowball/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Mental Health Tips for the COVID-19 Outbreak
Dr. Steve Joordens, a professor of psychology at the University of Toronto, Scarborough, regularly connects psychology to world events. Below, listen to the conversation or read the transcript, and hear Dr. Steve Joordens’s thoughts on: Tips to manage anxiety and fear around the new coronavirus pandemic How often you should check the news How parents […]
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This Australian meteor crater is oldest known, says study
“We found the world’s oldest asteroid strike in Western Australia. It might have triggered a global thaw.” Source: https://earthsky.org/earth/australian-yarrabubba-meteor-crater-oldest-known…
Data from antipodal places: First use of CMB polarization to detect gravitational lensing from galaxy clusters
Galaxies. Amalgamations of stars, interstellar gas, dust, stellar debris and dark matter. They waltz through the cold universe, gravity nurturing their embrace. Occasionally, galaxies snowball into enormous galaxy clusters with masses averaging 100 trillion times that of our sun. Source: https://phys.org/news/2020-01-antipodal-cmb-polarization-gravitational-lensing.html…
Frozen Earth in ‘Snowpiercer’ Is a Grim (and Possible) Future for Our Warming Planet
The grim future of new TNT sci-fi series “Snowpiercer” began with climate change. Could our rapidly warming world undergo a global deep freeze? Source: https://www.livescience.com/snowpiercer-snowball-earth.html
Saturn’s moon Enceladus is having a snowball fight with other moons
Three of Saturn’s icy moons are twice as shiny as we thought they were, and it’s partly because they are covered in a deep layer of snow from Enceladus’ geysers Source: https://www.newscientist.com/article/2216979-saturns-moon-enceladus-is-having-a-snowball-fight-with-other-moons/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…