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The solar wind is a stream of plasma released from the Sun's upper atmosphere. It consists of mostly electrons and protons with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy.
In ancient Greek religion and mythology, Helios (/ ˈ h iː l i ə s,-ɒ s /; Ancient Greek: Ἥλιος pronounced [hɛ̌ːlios], lit. 'Sun'; Homeric Greek: Ἠέλιος) is the god who personifies the Sun. His name is also Latinized as Helius, and he is often given the epithets Hyperion ("the one above") and Phaethon ("the shining").
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.
Stellar phenomena specifically associated with the Earth's Sun. ... Pages in category "Solar phenomena" The following 82 pages are in this category, out of 82 total. ...
Solar cycles are nearly periodic 11-year changes in the Sun's activity that are based on the number of sunspots present on the Sun's surface. The first solar cycle conventionally is said to have started in 1755. The source data are the revised International Sunspot Numbers (ISN v2.0), as available at SILSO. [1]
The text describes that a dou and mei were observed in the sun, where both words refer to a small obscuration. [7] The earliest record of a deliberate sunspot observation also comes from China, and dates to 364 BC, based on comments by astronomer Gan De (甘德) in a star catalogue . [ 8 ]
Under the U.S. Constitution, the officeholder leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces. [3] The first president, George Washington, won a unanimous vote of the Electoral College. [4] The incumbent president is Donald Trump, who assumed office on January 20, 2025.
Cryptic crossword clues consist typically of a definition and some type of word play. Cryptic crossword clues need to be viewed two ways. One is a surface reading and one a hidden meaning. [27] The surface reading is the basic reading of the clue to look for key words and how those words are constructed in the clue. The second way is the hidden ...