- A-type main-sequence star (Wikipedia)
An A-type main-sequence star (AV) or A dwarf star is a main-sequence (hydrogen burning) star of spectral type A and luminosity class V (five). These stars have spectra defined by strong hydrogen Balmer absorption lines. They measure between 1.4 and 2.1 solar masses (M☉) and have surface temperatures between 7,600 and 10,000 K. Bright and nearby examples are Altair (A7), Sirius A (A1), and Vega (A0). A-type stars do not have convective zones and thus are not expected to harbor magnetic dynamos. As a consequence, because they do not have strong stellar winds, they lack a means to generate X-ray emissions.
- Vincent van Gogh (Wikipedia)
Vincent Willem van Gogh (Dutch: [ˈvɪnsɛnt ˈʋɪləɱ vɑŋ ˈɣɔx]; 30 March 1853 – 29 July 1890) was a Dutch Post-Impressionist painter who is among the most famous and influential figures in the history of Western art. In just over a decade he created approximately 2100 artworks, including around 860 oil paintings, most of them in the last two years of his life. They include landscapes, still lifes, portraits and self-portraits, and are characterised by bold, symbolic colours, and dramatic, impulsive and highly expressive brushwork that contributed to the foundations of modern art. Only one of his paintings was known by name to have been sold during his lifetime. Van Gogh became famous after his suicide, aged 37, which followed years of poverty and mental illness.
