A new study suggests that the Gulf Stream – an Atlantic Ocean current that plays a large role in shaping Earth’s weather patterns – is weaker now than at any point in the last 1,000 years. Source: https://earthsky.org/earth/gulf-stream-atlantic-weakest-in-over-1000-years…
Tag: rotation
What’s the coldest Earth has ever been?
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…
Why does this galaxy look older than its years?
To the extent that we can see them, galaxies in the very early universe should look relatively young and unformed. But galaxy ALESS 073.1 is a surprise to astronomers: it looks more mature than we’d have any reason to expect. Why? Source: https://earthsky.org/space/galaxy-looks-older-than-its-years-aless-073-1…
Do we all see the same moon phase?
No matter where you are on the globe, we all see the same moon. So why do photos from a distant location sometimes look different from what you’re seeing? Source: https://earthsky.org/astronomy-essentials/do-we-all-see-the-same-moon-phase…
Galaxies have magnetic fields, too! Images here
Until recently, magnetic fields in the outskirts of galaxies were too faint to be detected. Although it’s still not clear what causes them or how they’re maintained, astronomers have started to create images of their observations of galaxies’ magnetic fields producing beautiful aurora-like effects. See them here. Source: https://earthsky.org/space/images-of-magnetic-fields-in-galaxies…
What is the Sickle in Leo?
The Sickle in Leo is an easy-to-spot backward question mark shape made of stars that marks the head and shoulders of the constellation of the lion. The moon sometimes passes in front of the Sickle’s brightest star, Regulus. Source: https://earthsky.org/favorite-star-patterns/the-sickle-backward-question-mark-pattern-in-leo…
NASA “mole’s” attempts to dig into Mars failed. What’s next?
The mission team for NASA’s InSight lander called off its attempts to try to dig deeper into Mars with the heat probe known as “the mole.” Meanwhile, the rest of the mission gained an extension to December 2022. Source: https://earthsky.org/space/nasa-calls-halt-to-attempts-by-insight-mole-to-dig-into-mars…
Twisted light from the beginning of time could reveal brand-new physics
A new study on the rotation of the universe’s first light could suggest physicists need new rule-breaking subatomic particles Source: https://www.livescience.com/big-bang-light-twisted-new-physics.html
China’s huge FAST telescope to open to international observers
FAST’s 500-meter (1,640-foot) dish makes it the world’s largest single-dish radio observatory. It’s expected to open to international observers in 2021. Source: https://earthsky.org/space/worlds-largest-radio-telescope-china-fast…
Saturn’s tilt caused by its moons
Two scientists from CNRS and Sorbonne University working at the Institute of Celestial Mechanics and Ephemeris Calculation (Paris Observatory—PSL/CNRS) have just shown that the influence of Saturn’s satellites can explain the tilt of the rotation axis of the gas giant. Their work, published on 18 January 2021 in the journal Nature Astronomy, also predicts that the tilt will increase even further…