Astronomia e Ciências Espaciais 2024



fhff

fhff

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Merceana, Alenquer / Nafarros, Sintra
Pois, Galiza será mais arriscado. Tudo correndo pelo normal, provavelmente farei umas férias e avançarei mais para o interior (Valladolid, Soria ou um pouco para lá de Madrid). Vamos ver...
 
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Orion

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SE2026Aug12T.GIF


10º é baixo no céu.

so11FFS.png


Quanto mais alto, melhor. Preferencialmente sem grandes obstáculos.

Guardem -> https://eclipsophile.com/tse2026/
 
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Para os auroróloucos na tugalândia, os riscos não compensam.

-> https://www.scientificamerican.com/...n-20-years-did-little-damage-but-worse-space/

The most powerful recorded geomagnetic storms in history, the Carrington Event of 1859 and the New York Railroad Storm of 1921, both registered at around –900 nT, although the former was potentially as high as –1,750 nT. Last weekend’s storm came in at a more sedate –412 nT, Dahl says. “Even though this was historic, it was nowhere close to the level of 1921 and 1859,” he says.
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-> https://science.nasa.gov/science-research/planetary-science/23jul_superstorm/

In his study, Riley looked carefully at a parameter called Dst, short for "disturbance – storm time." This is a number calculated from magnetometer readings around the equator. Essentially, it measures how hard Earth's magnetic field shakes when a CME hits. The more negative Dst becomes, the worse the storm. Ordinary geomagnetic storms, which produce Northern Lights around the Arctic Circle, but otherwise do no harm, register Dst=-50 nT (nanoTesla). The worst geomagnetic storm of the Space Age, which knocked out power across Quebec in March 1989, registered Dst=-600 nT. Modern estimates of Dst for the Carrington Event itself range from -800 nT to a staggering -1750 nT.
In their Dec. 2013 paper, Baker et al. estimated Dst for the July 2012 storm. "If that CME had hit Earth, the resulting geomagnetic storm would have registered a Dst of -1200, comparable to the Carrington Event and twice as bad as the March 1989 Quebec blackout."
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