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2 giorni fa · The 2012 phenomenon was a range of eschatological beliefs that cataclysmic or transformative events would occur on or around 21 December 2012.
2 giorni fa · aurora, luminous phenomenon of Earth’s upper atmosphere that occurs primarily in high latitudes of both hemispheres; in the Northern Hemisphere auroras are called aurora borealis, aurora polaris, or northern lights, and in the Southern Hemisphere they are called aurora australis or southern lights.
- The Editors of Encyclopaedia Britannica
4 giorni fa · Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in the troposphere, the lowest level of the atmosphere, which extends from Earth’s surface up to a height of 6–11 miles.
- Human activity affects global surface temperatures by changing Earth’s radiative balance—the “give and take” between what comes in during the day a...
- Continued global warming is expected to impact everything from energy use to water availability to crop productivity throughout the world. Poor cou...
- Polar bears live in the Arctic, where they use the region’s ice floes as they hunt seals and other marine mammals. Temperature increases related to...
1 giorno fa · The research, published in the journal Earth, Planets and Space in April, finds that whereas STEVE appears before midnight and flows from east to west, a twin phenomenon occurs in the predawn hours, flowing in the opposite direction. STEVE stands for "strong thermal emission velocity enhancement." The phenomenon was first noticed in 2016 thanks ...
1 giorno fa · A new celestial phenomenon was discovered recently thanks to the keen eye of a photographer and the invaluable data from ESA’s Swarm satellites. This finding suggests that Steve, a mysterious purple ribbon of light in the night sky, may have a secret twin. Sota Nanjo, along with a team of international scientists, and Tromsø-based ...
4 giorni fa · There, the particles interact with gases in our atmosphere resulting in beautiful displays of light in the sky. Oxygen gives off green and red light. Nitrogen glows blue and purple. These green bands of light in the winter sky above Alaska are an aurora borealis. This is the name for an aurora in the Northern Hemisphere. Credit: Sarah Histand.
3 giorni fa · The rocket reached a height of 240 kilometers, achieving a state of almost complete weightlessness for nearly six minutes. During this period, the researchers were able to run their experiments ...
