Astronomy Picture Of The Day: Lightning over the Volcano of Water

 

#NASA, #Space, #astronomy, #διάστημα

 

Explanation: Have you ever watched a lightning storm in awe? You're not alone. Details of what causes lightning are still being researched, but it is known that inside some clouds, internal updrafts cause collisions between ice and snow that slowly separate charges between cloud tops and bottoms. The rapid electrical discharges that are lightning soon result. Lightning usually takes a jagged course, rapidly heating a thin column of air to about three times the surface temperature of the Sun. The resulting shock wave starts supersonically and decays into the loud sound known as thunder. On average, around the world, about 6,000 lightning bolts occur between clouds and the Earth every minute. Pictured in July 2019 in a two-image composite, lightning stems from communication antennas near the top of Volcán de Agua (Volcano of Water) in Guatemala.

https://apod.nasa.gov/apod/ap250727.html

Astronomy Picture of the Day: Villarrica Volcano Against the Sky

 

 #VillarricaVolcano, #MagellanicClouds,#Earth

Explanation: When Vulcan, the Roman god of fire, swings his blacksmith's hammer, the sky is lit on fire. A recent eruption of Chile's Villarrica volcano shows the delicate interplay between this fire -- actually glowing steam and ash from melted rock -- and the light from distant stars in our Milky Way galaxy and the Magellanic Clouds galaxies. In the featured timelapse video, the Earth rotates under the stars as Villarrica erupts. With about 1350 volcanoes, our planet Earth rivals Jupiter's moon Io as the most geologically active place in the Solar System. While both have magnificent beauty, the reasons for the existence of volcanoes on both worlds are different. Earth's volcanoes typically occur between slowly shifting outer shell plates, while Io's volcanoes are caused by gravitational flexing resulting from Jupiter's tidal gravitational pull.

https://apod.nasa.gov/apod/ap240717.html

Astronomy Picture of the Day: A Triply Glowing Night Sky over Iceland

 

#διάστημα,#space,#Universe,#earth,#Volcano,
 

Explanation: The Sun is not the quiet place it seems. It expels an unsteady stream of energetic electrons and protons known as the solar wind. These charged particles deform the Earth's magnetosphere, change paths, and collide with atoms in Earth's atmosphere, causing the generation of light in auroras like that visible in green in the image left. Earth itself is also geologically active and covered with volcanoes. For example, Fagradalsfjall volcano in Iceland, seen emitting hot gas in orange near the image center. Iceland is one of the most geologically active places on Earth. On the far right is the Svartsengi geothermal power plant which creates the famous human-made Blue Lagoon, shown emitting white gas plumes. The featured composition therefore highlights three different sky phenomena, including both natural and human-made phenomena.

https://apod.nasa.gov/apod/ap230815.html

Signs of impending volcanic activity have been happening on La Palma for the past decade

Signs of impending volcanic activity have been happening on La Palma for the past decade https://t.co/C1fJHUO9eM

— New Scientist (@newscientist) September 26, 2021

Astronomy Picture of the Day: Light Pillar over Volcanic Etna

 

What happening above that volcano? Something very unusual -- a volcanic light pillar. More typically, light pillars are caused by sunlight and so appear as a bright column that extends upward above a rising or setting Sun. Alternatively, other light pillars -- some quite colorful -- have been recorded above street and house lights. This light pillar, though, was illuminated by the red light emitted by the glowing magma of an erupting volcano. The volcano is Italy's Mount Etna, and the featured image was captured with a single shot a few hours after sunset in mid-June. Freezing temperatures above the volcano's ash cloud created ice-crystals either in cirrus clouds high above the volcano -- or in condensed water vapor expelled by Mount Etna. These ice crystals -- mostly flat toward the ground but fluttering -- then reflected away light from the volcano's caldera.https://apod.nasa.gov/apod/ap211115.html

Canary Islands volcano still erupting, ash worries locals

 

Κανάρια νησιά, η στάχτη σκεπάζει τα πάντα!!!

https://nypost.com/2021/10/31/with-no-sign-of-eruptions-end-ash-blankets-la-palma-island/

Lightning strike during the Taal Volcano eruption in the Philippines.

 

Insta Science

Flowing lava from Kilauea Volcano's

Amazing footage of fast flowing lava from Kilauea Volcano's Fissure 8 taken by the USGS in 2018. pic.twitter.com/C5UdBfXjeC

— Wonder of Science (@wonderofscience) May 31, 2021