- The Giddiness of Time (streetsmartnaturalist.substack.com)
Although deep time manifests itself in many ways, it resonates more strongly in some locations. One such place is in downtown Seattle at the southwest corner of 2nd Avenue and Marion Street. There you will find a rather lovely art deco structure, the Exchange Building, originally built to house the city’s commodity exchanges. Alas, it opened in 1930 and the Depression prevented the building from meeting the owners’ great expectations. (Talk about bad timing!) But they did choose wisely with their building stone, the Morton Gneiss of Minnesota.
- G-type main-sequence star (Wikipedia)
A G-type main-sequence star (spectral type: G-V), also often, and imprecisely, called a yellow dwarf, or G star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.9 to 1.1 solar masses and an effective temperature between about 5,300 and 6,000 K. Like other main-sequence stars, a G-type main-sequence star converts the element hydrogen to helium in its core by means of nuclear fusion, but can also fuse helium when hydrogen runs out. The Sun, the star in the center of the Solar System to which the Earth is gravitationally bound, is an example of a G-type main-sequence star (G2V type). Each second, the Sun fuses approximately 600 million tons of hydrogen into helium in a process known as the proton–proton chain (4 hydrogens form 1 helium), converting about 4 million tons of matter to energy. Besides the Sun, other well-known examples of G-type main-sequence stars include Alpha Centauri, Tau Ceti, and 51 Pegasi.
- Exchange Building (Seattle) (Wikipedia)
The Exchange Building is a 23-story (275 ft) Art Deco office building located in the central business district of Seattle, Washington. It was designed to house the Seattle Stock Exchange by John Graham & Associates and completed in 1930.
