A team of researchers from Sydney’s University of New South Wales and the South Australian Museum have investigated how the reversal of Earth’s magnetic pole about 42,000 years could have changed earth’s atmosphere. CNN reports: “Using the ancient trees we could measure, and date, the spike in atmospheric radiocarbon levels caused by the collapse of Earth’s magnetic field,” Chris Turney, a…
Tag: outer space
We heart the Earth and sky
This Valentine’s Day, we find so much to love in the many heart-shaped objects created by Mother Nature that can be found right here on Earth or all the way to the deepest reaches of the sky. Source: https://earthsky.org/space/heart-shaped-objects-in-nature-space-earth-valentines-day…
How to prevent crashes between orbiting satellites
Thousands more satellites will soon orbit Earth. We need better rules to prevent space crashes. Source: https://earthsky.org/space/satellites-prevent-space-crashes…
Are We Slowing Global Warming?
This week New York Magazine featured a new article by journalist David Wallace-Wells about the state of the fight against global warming. He warns that “Already, the planet is warmer, at just 1.2 degrees, than it has ever been…” But there’s also some good news:
Just a half-decade ago, it was widely believed that a “business as usual” emissions path would bring…
US Space Force Members Are Now Called ‘Guardians’
Slashdot reader destinyland writes: The U.S. Space Force celebrated its one-year anniversary Friday with a new announcement: that members of this branch of the military will be referred to as “guardians.” They’re describing it as “A name chosen by space professionals, for space professionals.” The site Space.com notes that the phrase is a nod to the original long-standing “Space Command” branch…
Device mimics life’s first steps in outer space
A device developed by scientists at the CY Cergy Paris University and Paris Observatory promises insight into how the building blocks of life form in outer space. Source: https://phys.org/news/2020-12-device-mimics-life-outer-space.html…
Virgin Galactic Unexpectedly Aborted a Test Flight of Its Space Plane
CNN reports:
Virgin Galactic’s supersonic rocket plane was scheduled to fire into the upper atmosphere Saturday, but after climbing more than 40,000 feet over New Mexico attached to its mothership, the space plane made an unexpected turn toward home rather than shooting skyward. The company confirmed that the space plane, which was carrying test pilots CJ Sturckow and Dave Mackay, safely landed….
Find the Geminids’ radiant point
Why is the Geminid meteor shower best around 2 a.m.? It’s because that’s when the shower’s radiant point – near the bright star Castor in the constellation Gemini – is highest in the sky. Source: https://earthsky.org/astronomy-essentials/radiant-point-for-geminid-meteor-shower…
The Geeky Advent Calendar Tradition Continues in 2020
Long-time Slashdot reader destinyland writes: Advent of Code isn’t the only geeky tradition that’s continuing in 2020. “This is going to be the first full year with Raku being called Raku,” notes the site raku-advent.blog. “However, it’s going to be the 12th year (after this first article) in a row with a Perl 6 or Raku calendar, previously published in the…
All Three Monoliths Gone — Two Removed By Activist Vandals
A Reddit user found Google Earth photos showing the Utah monolith may have appeared in its canyon up to five years ago, according to The Daily Beast. But it’s gone now: Last week, a team of four people removed the Utah obelisk. One of them, a Utah adventure guide, explained their actions in an Instagram post. “We removed the Utah Monolith…